/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/chl/array-int-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:23:27,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:23:27,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:23:27,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:23:27,392 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 [2021-08-06 14:23:27,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:23:27,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:23:27,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:23:27,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:23:27,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:23:27,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:23:27,426 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:23:27,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:23:27,426 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:23:27,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:23:27,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:23:27,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:23:27,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:23:27,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:23:27,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:23:27,427 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:23:27,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:23:27,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:23:27,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:23:27,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:23:27,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:23:27,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:23:27,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:23:27,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:23:27,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:23:27,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:23:27,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:23:27,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:23:27,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:23:27,429 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:23:27,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:23:27,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:23:27,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:23:27,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:23:27,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:23:27,833 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:23:27,834 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:23:27,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl [2021-08-06 14:23:27,835 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2021-08-06 14:23:27,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:23:27,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:23:27,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:23:27,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:23:27,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:23:27,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:23:27,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:23:27,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:23:27,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:23:27,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:23:27,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:23:27,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:23:27,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:23:27,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/1) ... [2021-08-06 14:23:27,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:23:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:27,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 14:23:27,997 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 [2021-08-06 14:23:28,009 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:23:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:23:28,009 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:23:28,009 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:23:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:23:28,009 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:23:28,009 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:23:28,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:23:28,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:23:28,010 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:23:28,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:23:28,174 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-06 14:23:28,174 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 14:23:28,175 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 14:23:28,176 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:23:28 BoogieIcfgContainer [2021-08-06 14:23:28,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:23:28,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:23:28,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:23:28,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:23:28,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:27" (1/2) ... [2021-08-06 14:23:28,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8f080f and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:23:28, skipping insertion in model container [2021-08-06 14:23:28,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:23:28" (2/2) ... [2021-08-06 14:23:28,181 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2021-08-06 14:23:28,184 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:23:28,184 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:23:28,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:23:28,184 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:23:28,204 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 14:23:28,231 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:23:28,236 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 14:23:28,236 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 14:23:28,243 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-08-06 14:23:28,252 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 14:23:28,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:28,257 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:28,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash -381977313, now seen corresponding path program 1 times [2021-08-06 14:23:28,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:28,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666827050] [2021-08-06 14:23:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:28,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:28,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:28,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666827050] [2021-08-06 14:23:28,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666827050] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:28,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:28,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:23:28,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127368822] [2021-08-06 14:23:28,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:23:28,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:28,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:23:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:23:28,445 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:28,493 INFO L93 Difference]: Finished difference Result 40 states and 72 transitions. [2021-08-06 14:23:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:23:28,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-06 14:23:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:28,501 INFO L225 Difference]: With dead ends: 40 [2021-08-06 14:23:28,501 INFO L226 Difference]: Without dead ends: 37 [2021-08-06 14:23:28,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-06 14:23:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-08-06 14:23:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2021-08-06 14:23:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-08-06 14:23:28,536 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 10 [2021-08-06 14:23:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:28,537 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-08-06 14:23:28,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-08-06 14:23:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 14:23:28,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:28,538 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:28,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:23:28,538 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -481455773, now seen corresponding path program 2 times [2021-08-06 14:23:28,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:28,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088816769] [2021-08-06 14:23:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:28,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:28,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:28,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088816769] [2021-08-06 14:23:28,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088816769] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:28,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:28,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:23:28,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323305797] [2021-08-06 14:23:28,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:23:28,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:28,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:23:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:23:28,679 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:28,724 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-08-06 14:23:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:23:28,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-06 14:23:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:28,725 INFO L225 Difference]: With dead ends: 46 [2021-08-06 14:23:28,726 INFO L226 Difference]: Without dead ends: 43 [2021-08-06 14:23:28,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-06 14:23:28,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-08-06 14:23:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 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) [2021-08-06 14:23:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-08-06 14:23:28,730 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 10 [2021-08-06 14:23:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:28,730 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-08-06 14:23:28,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-08-06 14:23:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:28,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:28,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:28,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:23:28,731 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1042522309, now seen corresponding path program 1 times [2021-08-06 14:23:28,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:28,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549886189] [2021-08-06 14:23:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:28,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:28,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:28,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549886189] [2021-08-06 14:23:28,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549886189] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:28,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:28,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:28,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578324814] [2021-08-06 14:23:28,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:28,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:28,799 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:28,842 INFO L93 Difference]: Finished difference Result 41 states and 72 transitions. [2021-08-06 14:23:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:28,843 INFO L225 Difference]: With dead ends: 41 [2021-08-06 14:23:28,843 INFO L226 Difference]: Without dead ends: 36 [2021-08-06 14:23:28,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-06 14:23:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-08-06 14:23:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2021-08-06 14:23:28,847 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 11 [2021-08-06 14:23:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:28,847 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2021-08-06 14:23:28,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2021-08-06 14:23:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:28,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:28,848 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:28,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:23:28,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:28,849 INFO L82 PathProgramCache]: Analyzing trace with hash -707752653, now seen corresponding path program 1 times [2021-08-06 14:23:28,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:28,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163082052] [2021-08-06 14:23:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:28,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:28,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:28,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163082052] [2021-08-06 14:23:28,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163082052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:28,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101445749] [2021-08-06 14:23:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:28,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:28,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:28,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:28,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 14:23:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:29,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:23:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:29,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101445749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:29,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:29,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:23:29,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429092553] [2021-08-06 14:23:29,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:23:29,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:23:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:23:29,225 INFO L87 Difference]: Start difference. First operand 27 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:29,272 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2021-08-06 14:23:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:29,273 INFO L225 Difference]: With dead ends: 39 [2021-08-06 14:23:29,273 INFO L226 Difference]: Without dead ends: 39 [2021-08-06 14:23:29,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:23:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-06 14:23:29,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-08-06 14:23:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 53 transitions. [2021-08-06 14:23:29,277 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 53 transitions. Word has length 11 [2021-08-06 14:23:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:29,277 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 53 transitions. [2021-08-06 14:23:29,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 53 transitions. [2021-08-06 14:23:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:29,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:29,278 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:29,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:29,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:29,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash -742242413, now seen corresponding path program 2 times [2021-08-06 14:23:29,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:29,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893182421] [2021-08-06 14:23:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:29,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:29,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:29,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893182421] [2021-08-06 14:23:29,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893182421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:29,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939267214] [2021-08-06 14:23:29,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:29,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:29,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:29,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:29,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 14:23:29,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:29,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:23:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:29,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939267214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:29,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:29,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:23:29,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469689997] [2021-08-06 14:23:29,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:23:29,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:29,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:23:29,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:29,734 INFO L87 Difference]: Start difference. First operand 28 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:29,772 INFO L93 Difference]: Finished difference Result 52 states and 92 transitions. [2021-08-06 14:23:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:29,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:29,773 INFO L225 Difference]: With dead ends: 52 [2021-08-06 14:23:29,773 INFO L226 Difference]: Without dead ends: 52 [2021-08-06 14:23:29,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:23:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-06 14:23:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-08-06 14:23:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 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) [2021-08-06 14:23:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 60 transitions. [2021-08-06 14:23:29,776 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 60 transitions. Word has length 11 [2021-08-06 14:23:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:29,777 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 60 transitions. [2021-08-06 14:23:29,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 60 transitions. [2021-08-06 14:23:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:29,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:29,778 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:29,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:29,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:29,995 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:29,996 INFO L82 PathProgramCache]: Analyzing trace with hash 59373815, now seen corresponding path program 2 times [2021-08-06 14:23:29,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:29,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719480111] [2021-08-06 14:23:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:29,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:30,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719480111] [2021-08-06 14:23:30,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719480111] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:30,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:30,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:30,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491969311] [2021-08-06 14:23:30,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:30,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:30,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:30,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:30,047 INFO L87 Difference]: Start difference. First operand 30 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:30,078 INFO L93 Difference]: Finished difference Result 42 states and 77 transitions. [2021-08-06 14:23:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:30,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:30,078 INFO L225 Difference]: With dead ends: 42 [2021-08-06 14:23:30,078 INFO L226 Difference]: Without dead ends: 41 [2021-08-06 14:23:30,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-06 14:23:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-08-06 14:23:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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) [2021-08-06 14:23:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-08-06 14:23:30,081 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 11 [2021-08-06 14:23:30,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:30,081 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-08-06 14:23:30,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-08-06 14:23:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:30,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:30,082 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:30,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 14:23:30,082 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash 865278773, now seen corresponding path program 3 times [2021-08-06 14:23:30,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:30,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243723494] [2021-08-06 14:23:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:30,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:30,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243723494] [2021-08-06 14:23:30,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243723494] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:30,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:30,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:30,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300303666] [2021-08-06 14:23:30,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:30,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:30,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:30,119 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:30,151 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-08-06 14:23:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:30,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:30,152 INFO L225 Difference]: With dead ends: 46 [2021-08-06 14:23:30,152 INFO L226 Difference]: Without dead ends: 44 [2021-08-06 14:23:30,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-06 14:23:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-08-06 14:23:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-08-06 14:23:30,155 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 11 [2021-08-06 14:23:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:30,155 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-08-06 14:23:30,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-08-06 14:23:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:30,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:30,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:30,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 14:23:30,156 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1777717521, now seen corresponding path program 3 times [2021-08-06 14:23:30,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:30,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68921957] [2021-08-06 14:23:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:30,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:30,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68921957] [2021-08-06 14:23:30,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68921957] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:30,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:30,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:30,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732088098] [2021-08-06 14:23:30,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:30,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:30,194 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:30,235 INFO L93 Difference]: Finished difference Result 38 states and 73 transitions. [2021-08-06 14:23:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:30,236 INFO L225 Difference]: With dead ends: 38 [2021-08-06 14:23:30,236 INFO L226 Difference]: Without dead ends: 38 [2021-08-06 14:23:30,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-06 14:23:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-08-06 14:23:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-08-06 14:23:30,238 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 11 [2021-08-06 14:23:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:30,238 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-08-06 14:23:30,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-08-06 14:23:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:30,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:30,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:30,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 14:23:30,239 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 617529755, now seen corresponding path program 4 times [2021-08-06 14:23:30,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:30,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308899530] [2021-08-06 14:23:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:30,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:30,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308899530] [2021-08-06 14:23:30,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308899530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:30,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257367293] [2021-08-06 14:23:30,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:30,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:30,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:30,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:30,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 14:23:30,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:30,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:23:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257367293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:30,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:30,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:23:30,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518816966] [2021-08-06 14:23:30,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:23:30,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:30,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:23:30,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:23:30,422 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:30,457 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2021-08-06 14:23:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:30,457 INFO L225 Difference]: With dead ends: 42 [2021-08-06 14:23:30,458 INFO L226 Difference]: Without dead ends: 42 [2021-08-06 14:23:30,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:23:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-06 14:23:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-08-06 14:23:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 57 transitions. [2021-08-06 14:23:30,460 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 57 transitions. Word has length 11 [2021-08-06 14:23:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:30,461 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 57 transitions. [2021-08-06 14:23:30,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 57 transitions. [2021-08-06 14:23:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:30,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:30,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:30,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:30,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:30,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2019920013, now seen corresponding path program 4 times [2021-08-06 14:23:30,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:30,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476072539] [2021-08-06 14:23:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:30,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:30,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476072539] [2021-08-06 14:23:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476072539] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:30,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:30,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:30,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851264298] [2021-08-06 14:23:30,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:30,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:30,719 INFO L87 Difference]: Start difference. First operand 29 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:30,750 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2021-08-06 14:23:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:30,751 INFO L225 Difference]: With dead ends: 41 [2021-08-06 14:23:30,751 INFO L226 Difference]: Without dead ends: 39 [2021-08-06 14:23:30,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-06 14:23:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-08-06 14:23:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-08-06 14:23:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-08-06 14:23:30,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-08-06 14:23:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:30,753 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-08-06 14:23:30,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-08-06 14:23:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:30,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:30,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:30,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 14:23:30,754 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1491865081, now seen corresponding path program 5 times [2021-08-06 14:23:30,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:30,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204085302] [2021-08-06 14:23:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:30,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:30,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204085302] [2021-08-06 14:23:30,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204085302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:30,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062078866] [2021-08-06 14:23:30,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:30,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:30,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:30,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:30,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 14:23:30,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:30,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:30,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:23:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:30,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062078866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:30,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:30,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 14:23:30,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146219029] [2021-08-06 14:23:30,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:23:30,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:23:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:30,925 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:30,952 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-08-06 14:23:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:30,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:30,953 INFO L225 Difference]: With dead ends: 44 [2021-08-06 14:23:30,953 INFO L226 Difference]: Without dead ends: 44 [2021-08-06 14:23:30,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:23:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-06 14:23:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-08-06 14:23:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-08-06 14:23:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-08-06 14:23:30,955 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-08-06 14:23:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:30,955 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-08-06 14:23:30,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-08-06 14:23:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:30,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:30,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:30,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:31,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:31,170 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:31,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:31,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2001485987, now seen corresponding path program 5 times [2021-08-06 14:23:31,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:31,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143594299] [2021-08-06 14:23:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:31,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:31,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:31,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143594299] [2021-08-06 14:23:31,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143594299] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:31,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:31,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:31,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602152577] [2021-08-06 14:23:31,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:31,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:31,205 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:31,235 INFO L93 Difference]: Finished difference Result 41 states and 73 transitions. [2021-08-06 14:23:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:31,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:31,236 INFO L225 Difference]: With dead ends: 41 [2021-08-06 14:23:31,236 INFO L226 Difference]: Without dead ends: 40 [2021-08-06 14:23:31,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-06 14:23:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-08-06 14:23:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 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) [2021-08-06 14:23:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 60 transitions. [2021-08-06 14:23:31,238 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 60 transitions. Word has length 11 [2021-08-06 14:23:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:31,238 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 60 transitions. [2021-08-06 14:23:31,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 60 transitions. [2021-08-06 14:23:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:31,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:31,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:31,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 14:23:31,238 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1195581029, now seen corresponding path program 6 times [2021-08-06 14:23:31,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:31,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642892636] [2021-08-06 14:23:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:31,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:31,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:31,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642892636] [2021-08-06 14:23:31,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642892636] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:31,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:31,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:31,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711283189] [2021-08-06 14:23:31,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:31,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:31,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:31,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:31,298 INFO L87 Difference]: Start difference. First operand 31 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:31,350 INFO L93 Difference]: Finished difference Result 35 states and 65 transitions. [2021-08-06 14:23:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:31,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:31,350 INFO L225 Difference]: With dead ends: 35 [2021-08-06 14:23:31,350 INFO L226 Difference]: Without dead ends: 33 [2021-08-06 14:23:31,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:31,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-06 14:23:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-08-06 14:23:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 59 transitions. [2021-08-06 14:23:31,352 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 59 transitions. Word has length 11 [2021-08-06 14:23:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:31,352 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 59 transitions. [2021-08-06 14:23:31,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 59 transitions. [2021-08-06 14:23:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 14:23:31,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:31,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:31,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-06 14:23:31,353 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash -283142281, now seen corresponding path program 6 times [2021-08-06 14:23:31,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:31,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567361978] [2021-08-06 14:23:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:31,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:31,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:31,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567361978] [2021-08-06 14:23:31,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567361978] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:31,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:31,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:31,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587871311] [2021-08-06 14:23:31,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:31,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:31,398 INFO L87 Difference]: Start difference. First operand 31 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:31,441 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2021-08-06 14:23:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 14:23:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:31,456 INFO L225 Difference]: With dead ends: 32 [2021-08-06 14:23:31,456 INFO L226 Difference]: Without dead ends: 32 [2021-08-06 14:23:31,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-06 14:23:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-08-06 14:23:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2021-08-06 14:23:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-08-06 14:23:31,458 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-08-06 14:23:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:31,458 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-08-06 14:23:31,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:31,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-08-06 14:23:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 14:23:31,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:31,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:31,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 14:23:31,458 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash -466578639, now seen corresponding path program 1 times [2021-08-06 14:23:31,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:31,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742030042] [2021-08-06 14:23:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:31,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:31,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:31,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742030042] [2021-08-06 14:23:31,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742030042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:31,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749543543] [2021-08-06 14:23:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:31,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:31,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:31,773 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:31,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 14:23:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:31,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:23:31,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:32,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 69 [2021-08-06 14:23:32,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 53 [2021-08-06 14:23:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:32,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749543543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:32,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:32,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-06 14:23:32,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967151782] [2021-08-06 14:23:32,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:23:32,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:23:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:23:32,253 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-08-06 14:23:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:32,397 INFO L93 Difference]: Finished difference Result 56 states and 104 transitions. [2021-08-06 14:23:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:32,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 12 [2021-08-06 14:23:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:32,398 INFO L225 Difference]: With dead ends: 56 [2021-08-06 14:23:32,398 INFO L226 Difference]: Without dead ends: 53 [2021-08-06 14:23:32,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-06 14:23:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2021-08-06 14:23:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 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) [2021-08-06 14:23:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 72 transitions. [2021-08-06 14:23:32,399 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 72 transitions. Word has length 12 [2021-08-06 14:23:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:32,400 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 72 transitions. [2021-08-06 14:23:32,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2021-08-06 14:23:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 72 transitions. [2021-08-06 14:23:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 14:23:32,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:32,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:32,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:32,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 14:23:32,609 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1514371261, now seen corresponding path program 2 times [2021-08-06 14:23:32,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:32,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257353674] [2021-08-06 14:23:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:32,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:32,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:32,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257353674] [2021-08-06 14:23:32,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257353674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:32,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088182847] [2021-08-06 14:23:32,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:32,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:32,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:32,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:32,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 14:23:32,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:32,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:23:32,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:33,080 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:33,080 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 74 treesize of output 65 [2021-08-06 14:23:33,087 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:33,087 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 62 treesize of output 53 [2021-08-06 14:23:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:33,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088182847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:33,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:33,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 14:23:33,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372982572] [2021-08-06 14:23:33,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:33,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:33,162 INFO L87 Difference]: Start difference. First operand 37 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:33,281 INFO L93 Difference]: Finished difference Result 57 states and 107 transitions. [2021-08-06 14:23:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:33,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 14:23:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:33,281 INFO L225 Difference]: With dead ends: 57 [2021-08-06 14:23:33,282 INFO L226 Difference]: Without dead ends: 54 [2021-08-06 14:23:33,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-06 14:23:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2021-08-06 14:23:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 42 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) [2021-08-06 14:23:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2021-08-06 14:23:33,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 12 [2021-08-06 14:23:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:33,284 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2021-08-06 14:23:33,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2021-08-06 14:23:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 14:23:33,284 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:33,284 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:33,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:33,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 14:23:33,501 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1506640863, now seen corresponding path program 3 times [2021-08-06 14:23:33,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:33,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605904903] [2021-08-06 14:23:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:33,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:33,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:33,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605904903] [2021-08-06 14:23:33,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605904903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:33,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401752900] [2021-08-06 14:23:33,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:33,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:33,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:33,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 14:23:33,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:23:33,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:23:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:33,994 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:33,994 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 97 treesize of output 84 [2021-08-06 14:23:34,002 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:34,002 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 81 treesize of output 68 [2021-08-06 14:23:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:34,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401752900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:34,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:34,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:34,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055473671] [2021-08-06 14:23:34,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:34,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:34,268 INFO L87 Difference]: Start difference. First operand 43 states and 88 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:34,322 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2021-08-06 14:23:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:23:34,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 14:23:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:34,322 INFO L225 Difference]: With dead ends: 54 [2021-08-06 14:23:34,322 INFO L226 Difference]: Without dead ends: 51 [2021-08-06 14:23:34,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-06 14:23:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-08-06 14:23:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 42 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) [2021-08-06 14:23:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2021-08-06 14:23:34,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 12 [2021-08-06 14:23:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:34,324 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2021-08-06 14:23:34,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2021-08-06 14:23:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 14:23:34,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:34,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:34,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:34,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:34,526 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1983860283, now seen corresponding path program 4 times [2021-08-06 14:23:34,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:34,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034255221] [2021-08-06 14:23:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:34,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:35,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:35,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034255221] [2021-08-06 14:23:35,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034255221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:35,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064563349] [2021-08-06 14:23:35,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:35,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:35,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:35,142 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:35,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 14:23:35,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:35,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:35,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:23:35,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:35,539 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:35,539 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 75 treesize of output 66 [2021-08-06 14:23:35,546 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:35,546 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 63 treesize of output 54 [2021-08-06 14:23:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:35,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064563349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:35,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:35,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-08-06 14:23:35,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737984134] [2021-08-06 14:23:35,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:35,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:35,634 INFO L87 Difference]: Start difference. First operand 43 states and 88 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:36,070 INFO L93 Difference]: Finished difference Result 70 states and 138 transitions. [2021-08-06 14:23:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:23:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 14:23:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:36,071 INFO L225 Difference]: With dead ends: 70 [2021-08-06 14:23:36,071 INFO L226 Difference]: Without dead ends: 67 [2021-08-06 14:23:36,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 448.8ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-06 14:23:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2021-08-06 14:23:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 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) [2021-08-06 14:23:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2021-08-06 14:23:36,074 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 12 [2021-08-06 14:23:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:36,074 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2021-08-06 14:23:36,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2021-08-06 14:23:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 14:23:36,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:36,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:36,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-06 14:23:36,282 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,SelfDestructingSolverStorable17 [2021-08-06 14:23:36,283 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash -976515683, now seen corresponding path program 5 times [2021-08-06 14:23:36,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:36,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931324524] [2021-08-06 14:23:36,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:36,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:36,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:36,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931324524] [2021-08-06 14:23:36,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931324524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:36,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930962619] [2021-08-06 14:23:36,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:36,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:36,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:36,437 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:36,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 14:23:36,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:36,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:36,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:23:36,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:36,815 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:36,815 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 74 treesize of output 65 [2021-08-06 14:23:36,821 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:36,821 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 62 treesize of output 53 [2021-08-06 14:23:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:36,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930962619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:36,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:36,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 14:23:36,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828300069] [2021-08-06 14:23:36,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:36,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:36,885 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:36,973 INFO L93 Difference]: Finished difference Result 66 states and 130 transitions. [2021-08-06 14:23:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:36,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 14:23:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:36,974 INFO L225 Difference]: With dead ends: 66 [2021-08-06 14:23:36,974 INFO L226 Difference]: Without dead ends: 63 [2021-08-06 14:23:36,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:36,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-06 14:23:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-08-06 14:23:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 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) [2021-08-06 14:23:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2021-08-06 14:23:36,977 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 12 [2021-08-06 14:23:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:36,977 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2021-08-06 14:23:36,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2021-08-06 14:23:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 14:23:36,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:36,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:37,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:37,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:37,200 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash -968785285, now seen corresponding path program 6 times [2021-08-06 14:23:37,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:37,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948981114] [2021-08-06 14:23:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:37,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:37,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948981114] [2021-08-06 14:23:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948981114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:37,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175793273] [2021-08-06 14:23:37,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:37,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:37,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:37,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 14:23:37,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:23:37,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:37,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 14:23:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:37,688 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:37,688 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 74 treesize of output 65 [2021-08-06 14:23:37,693 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:37,693 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 62 treesize of output 53 [2021-08-06 14:23:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:37,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175793273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:37,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:37,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 14:23:37,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210010756] [2021-08-06 14:23:37,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:37,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:37,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:37,764 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:37,889 INFO L93 Difference]: Finished difference Result 58 states and 117 transitions. [2021-08-06 14:23:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:23:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 14:23:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:37,889 INFO L225 Difference]: With dead ends: 58 [2021-08-06 14:23:37,889 INFO L226 Difference]: Without dead ends: 55 [2021-08-06 14:23:37,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:37,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-06 14:23:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2021-08-06 14:23:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 93 transitions. [2021-08-06 14:23:37,891 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 93 transitions. Word has length 12 [2021-08-06 14:23:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:37,891 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 93 transitions. [2021-08-06 14:23:37,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 93 transitions. [2021-08-06 14:23:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:37,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:37,892 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:37,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:38,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:38,092 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1580118797, now seen corresponding path program 7 times [2021-08-06 14:23:38,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:38,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449885863] [2021-08-06 14:23:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:38,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:38,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:38,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449885863] [2021-08-06 14:23:38,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449885863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:38,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627435616] [2021-08-06 14:23:38,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:38,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:38,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:38,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 14:23:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:38,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:23:38,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:23:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:38,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627435616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:38,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:38,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:38,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564396670] [2021-08-06 14:23:38,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:38,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:38,632 INFO L87 Difference]: Start difference. First operand 45 states and 93 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:38,867 INFO L93 Difference]: Finished difference Result 65 states and 127 transitions. [2021-08-06 14:23:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:23:38,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:38,868 INFO L225 Difference]: With dead ends: 65 [2021-08-06 14:23:38,868 INFO L226 Difference]: Without dead ends: 58 [2021-08-06 14:23:38,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-06 14:23:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-08-06 14:23:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 87 transitions. [2021-08-06 14:23:38,871 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 87 transitions. Word has length 13 [2021-08-06 14:23:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:38,872 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 87 transitions. [2021-08-06 14:23:38,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 87 transitions. [2021-08-06 14:23:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:38,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:38,873 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:38,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:39,090 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,SelfDestructingSolverStorable20 [2021-08-06 14:23:39,090 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:39,090 INFO L82 PathProgramCache]: Analyzing trace with hash -4067771, now seen corresponding path program 8 times [2021-08-06 14:23:39,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:39,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181204182] [2021-08-06 14:23:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:39,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:39,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:39,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181204182] [2021-08-06 14:23:39,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181204182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:39,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32774814] [2021-08-06 14:23:39,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:39,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:39,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:39,160 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:39,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 14:23:39,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:39,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:39,523 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:23:39,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:23:39,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:23:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:39,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32774814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:39,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:39,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:39,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253260368] [2021-08-06 14:23:39,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:39,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:39,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:39,564 INFO L87 Difference]: Start difference. First operand 42 states and 87 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:39,675 INFO L93 Difference]: Finished difference Result 64 states and 129 transitions. [2021-08-06 14:23:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:39,676 INFO L225 Difference]: With dead ends: 64 [2021-08-06 14:23:39,676 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 14:23:39,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 14:23:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2021-08-06 14:23:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 90 transitions. [2021-08-06 14:23:39,679 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 90 transitions. Word has length 13 [2021-08-06 14:23:39,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:39,679 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 90 transitions. [2021-08-06 14:23:39,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 90 transitions. [2021-08-06 14:23:39,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:39,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:39,680 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:39,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-06 14:23:39,888 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,SelfDestructingSolverStorable21 [2021-08-06 14:23:39,889 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:39,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1853476621, now seen corresponding path program 9 times [2021-08-06 14:23:39,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:39,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640381922] [2021-08-06 14:23:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:39,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:39,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640381922] [2021-08-06 14:23:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640381922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:39,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796579500] [2021-08-06 14:23:39,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:39,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:39,971 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:39,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:23:40,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:23:40,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:40,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:40,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:40,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:40,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:40,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:40,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796579500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:40,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:40,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:40,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223122901] [2021-08-06 14:23:40,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:40,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:40,373 INFO L87 Difference]: Start difference. First operand 43 states and 90 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:40,614 INFO L93 Difference]: Finished difference Result 109 states and 203 transitions. [2021-08-06 14:23:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:23:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:23:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:40,615 INFO L225 Difference]: With dead ends: 109 [2021-08-06 14:23:40,615 INFO L226 Difference]: Without dead ends: 109 [2021-08-06 14:23:40,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:40,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-06 14:23:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 47. [2021-08-06 14:23:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 105 transitions. [2021-08-06 14:23:40,617 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 105 transitions. Word has length 13 [2021-08-06 14:23:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:40,617 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 105 transitions. [2021-08-06 14:23:40,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 105 transitions. [2021-08-06 14:23:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:40,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:40,618 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:40,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:40,823 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,SelfDestructingSolverStorable22 [2021-08-06 14:23:40,823 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1051860393, now seen corresponding path program 10 times [2021-08-06 14:23:40,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:40,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157614290] [2021-08-06 14:23:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:40,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:40,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:40,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157614290] [2021-08-06 14:23:40,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157614290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:40,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638853616] [2021-08-06 14:23:40,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:40,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:40,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:40,913 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:40,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:23:41,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:41,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:41,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:41,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:41,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:41,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:41,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:41,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638853616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:41,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:41,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:41,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262551444] [2021-08-06 14:23:41,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:41,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:41,360 INFO L87 Difference]: Start difference. First operand 47 states and 105 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:41,704 INFO L93 Difference]: Finished difference Result 96 states and 186 transitions. [2021-08-06 14:23:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:23:41,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:41,705 INFO L225 Difference]: With dead ends: 96 [2021-08-06 14:23:41,705 INFO L226 Difference]: Without dead ends: 91 [2021-08-06 14:23:41,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:23:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-06 14:23:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2021-08-06 14:23:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 48 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 107 transitions. [2021-08-06 14:23:41,707 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 107 transitions. Word has length 13 [2021-08-06 14:23:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:41,707 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 107 transitions. [2021-08-06 14:23:41,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 107 transitions. [2021-08-06 14:23:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:41,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:41,707 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:41,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:41,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:41,917 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash 666483313, now seen corresponding path program 11 times [2021-08-06 14:23:41,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:41,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077730501] [2021-08-06 14:23:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:41,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:42,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:42,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077730501] [2021-08-06 14:23:42,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077730501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:42,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746200547] [2021-08-06 14:23:42,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:42,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:42,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:42,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:42,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 14:23:42,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:23:42,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:42,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:42,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:42,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:42,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746200547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:42,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:42,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:42,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067966582] [2021-08-06 14:23:42,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:42,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:42,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:42,460 INFO L87 Difference]: Start difference. First operand 49 states and 107 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:42,705 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-08-06 14:23:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:23:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:42,706 INFO L225 Difference]: With dead ends: 90 [2021-08-06 14:23:42,706 INFO L226 Difference]: Without dead ends: 90 [2021-08-06 14:23:42,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:23:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-06 14:23:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 48. [2021-08-06 14:23:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-08-06 14:23:42,708 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-08-06 14:23:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:42,708 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-08-06 14:23:42,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-08-06 14:23:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:42,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:42,709 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:42,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:42,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:42,917 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1044129995, now seen corresponding path program 12 times [2021-08-06 14:23:42,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:42,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569402919] [2021-08-06 14:23:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:42,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:42,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:42,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569402919] [2021-08-06 14:23:42,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569402919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:42,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232263034] [2021-08-06 14:23:42,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:42,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:42,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:42,998 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:42,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 14:23:43,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:23:43,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:43,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:43,397 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:43,397 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 41 treesize of output 38 [2021-08-06 14:23:43,402 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:43,402 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 34 treesize of output 29 [2021-08-06 14:23:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:43,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232263034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:43,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:43,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:43,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286172475] [2021-08-06 14:23:43,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:43,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:43,442 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:43,523 INFO L93 Difference]: Finished difference Result 74 states and 153 transitions. [2021-08-06 14:23:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:43,524 INFO L225 Difference]: With dead ends: 74 [2021-08-06 14:23:43,524 INFO L226 Difference]: Without dead ends: 74 [2021-08-06 14:23:43,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-06 14:23:43,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2021-08-06 14:23:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-08-06 14:23:43,526 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-08-06 14:23:43,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:43,526 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-08-06 14:23:43,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-08-06 14:23:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:43,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:43,526 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:43,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:43,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 14:23:43,745 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1239138935, now seen corresponding path program 13 times [2021-08-06 14:23:43,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:43,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993886798] [2021-08-06 14:23:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:43,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:43,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:43,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993886798] [2021-08-06 14:23:43,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993886798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:43,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206003925] [2021-08-06 14:23:43,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:43,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:43,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:43,812 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:43,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 14:23:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:44,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:44,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:23:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:44,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:23:44,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:44,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:23:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:44,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206003925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:44,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:44,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:44,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135507971] [2021-08-06 14:23:44,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:44,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:44,241 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:44,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:44,323 INFO L93 Difference]: Finished difference Result 81 states and 162 transitions. [2021-08-06 14:23:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:23:44,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:23:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:44,324 INFO L225 Difference]: With dead ends: 81 [2021-08-06 14:23:44,324 INFO L226 Difference]: Without dead ends: 81 [2021-08-06 14:23:44,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-06 14:23:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2021-08-06 14:23:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.30188679245283) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 122 transitions. [2021-08-06 14:23:44,326 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 122 transitions. Word has length 13 [2021-08-06 14:23:44,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:44,326 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 122 transitions. [2021-08-06 14:23:44,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:44,326 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 122 transitions. [2021-08-06 14:23:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:44,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:44,327 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:44,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:44,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 14:23:44,544 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:44,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:44,545 INFO L82 PathProgramCache]: Analyzing trace with hash 319438227, now seen corresponding path program 14 times [2021-08-06 14:23:44,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:44,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622087221] [2021-08-06 14:23:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:44,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:44,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:44,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622087221] [2021-08-06 14:23:44,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622087221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:44,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804831369] [2021-08-06 14:23:44,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:44,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:44,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:44,620 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:44,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 14:23:44,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:44,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:44,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:45,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:45,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:23:45,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:45,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:23:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804831369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:45,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:45,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:45,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665914464] [2021-08-06 14:23:45,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:45,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:45,071 INFO L87 Difference]: Start difference. First operand 54 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:45,241 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2021-08-06 14:23:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:23:45,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:45,242 INFO L225 Difference]: With dead ends: 73 [2021-08-06 14:23:45,242 INFO L226 Difference]: Without dead ends: 70 [2021-08-06 14:23:45,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:23:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-06 14:23:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2021-08-06 14:23:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 121 transitions. [2021-08-06 14:23:45,243 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 121 transitions. Word has length 13 [2021-08-06 14:23:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:45,244 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 121 transitions. [2021-08-06 14:23:45,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 121 transitions. [2021-08-06 14:23:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:45,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:45,244 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:45,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:45,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 14:23:45,453 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:45,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1246869333, now seen corresponding path program 15 times [2021-08-06 14:23:45,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:45,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703420127] [2021-08-06 14:23:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:45,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:45,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:45,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703420127] [2021-08-06 14:23:45,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703420127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:45,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061339146] [2021-08-06 14:23:45,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:45,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:45,528 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:45,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 14:23:45,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:23:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:45,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:45,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:45,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:45,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:45,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061339146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:46,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:46,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:46,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468565765] [2021-08-06 14:23:46,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:46,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:46,032 INFO L87 Difference]: Start difference. First operand 54 states and 121 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:46,164 INFO L93 Difference]: Finished difference Result 90 states and 171 transitions. [2021-08-06 14:23:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:23:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:23:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:46,165 INFO L225 Difference]: With dead ends: 90 [2021-08-06 14:23:46,165 INFO L226 Difference]: Without dead ends: 89 [2021-08-06 14:23:46,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:23:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-06 14:23:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2021-08-06 14:23:46,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 119 transitions. [2021-08-06 14:23:46,167 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 119 transitions. Word has length 13 [2021-08-06 14:23:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:46,167 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 119 transitions. [2021-08-06 14:23:46,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 119 transitions. [2021-08-06 14:23:46,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:46,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:46,167 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:46,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:46,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 14:23:46,385 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2048485561, now seen corresponding path program 16 times [2021-08-06 14:23:46,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:46,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779422913] [2021-08-06 14:23:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:46,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:46,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779422913] [2021-08-06 14:23:46,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779422913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:46,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126282421] [2021-08-06 14:23:46,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:46,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:46,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:46,453 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:46,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 14:23:46,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:46,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:46,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:46,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:46,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:46,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126282421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:46,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:46,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:46,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090720037] [2021-08-06 14:23:46,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:46,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:46,949 INFO L87 Difference]: Start difference. First operand 54 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:47,121 INFO L93 Difference]: Finished difference Result 80 states and 160 transitions. [2021-08-06 14:23:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:23:47,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:47,122 INFO L225 Difference]: With dead ends: 80 [2021-08-06 14:23:47,122 INFO L226 Difference]: Without dead ends: 76 [2021-08-06 14:23:47,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:23:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-06 14:23:47,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-08-06 14:23:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2021-08-06 14:23:47,123 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 13 [2021-08-06 14:23:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:47,123 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2021-08-06 14:23:47,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2021-08-06 14:23:47,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:47,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:47,124 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:47,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:47,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:47,333 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -528138029, now seen corresponding path program 17 times [2021-08-06 14:23:47,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:47,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445728838] [2021-08-06 14:23:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:47,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:47,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:47,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445728838] [2021-08-06 14:23:47,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445728838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:47,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887753026] [2021-08-06 14:23:47,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:47,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:47,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:47,427 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:47,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 14:23:47,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:23:47,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:47,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:47,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:47,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:47,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:47,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:47,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:47,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887753026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:47,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:47,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:47,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471114091] [2021-08-06 14:23:47,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:47,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:47,909 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:48,039 INFO L93 Difference]: Finished difference Result 73 states and 154 transitions. [2021-08-06 14:23:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:23:48,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:48,040 INFO L225 Difference]: With dead ends: 73 [2021-08-06 14:23:48,040 INFO L226 Difference]: Without dead ends: 73 [2021-08-06 14:23:48,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:23:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-06 14:23:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2021-08-06 14:23:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 116 transitions. [2021-08-06 14:23:48,042 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 116 transitions. Word has length 13 [2021-08-06 14:23:48,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:48,042 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 116 transitions. [2021-08-06 14:23:48,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 116 transitions. [2021-08-06 14:23:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:48,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:48,042 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:48,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:48,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:48,260 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash -242535663, now seen corresponding path program 18 times [2021-08-06 14:23:48,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:48,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764458378] [2021-08-06 14:23:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:48,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:48,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:48,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764458378] [2021-08-06 14:23:48,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764458378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:48,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318881474] [2021-08-06 14:23:48,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:48,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:48,336 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:48,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 14:23:48,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:23:48,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:48,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:48,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:48,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:48,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:48,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:48,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318881474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:48,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:48,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:48,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033290174] [2021-08-06 14:23:48,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:48,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:48,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:48,852 INFO L87 Difference]: Start difference. First operand 54 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:48,968 INFO L93 Difference]: Finished difference Result 102 states and 197 transitions. [2021-08-06 14:23:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:23:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:23:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:48,968 INFO L225 Difference]: With dead ends: 102 [2021-08-06 14:23:48,969 INFO L226 Difference]: Without dead ends: 102 [2021-08-06 14:23:48,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:23:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-06 14:23:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 58. [2021-08-06 14:23:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 57 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 131 transitions. [2021-08-06 14:23:48,970 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 131 transitions. Word has length 13 [2021-08-06 14:23:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:48,970 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 131 transitions. [2021-08-06 14:23:48,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 131 transitions. [2021-08-06 14:23:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:48,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:48,971 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:48,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:49,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:49,189 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:49,189 INFO L82 PathProgramCache]: Analyzing trace with hash 559080565, now seen corresponding path program 19 times [2021-08-06 14:23:49,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:49,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212844864] [2021-08-06 14:23:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:49,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:49,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:49,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212844864] [2021-08-06 14:23:49,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212844864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:49,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447809331] [2021-08-06 14:23:49,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:49,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:49,253 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:49,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 14:23:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:49,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:49,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:49,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:49,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:49,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:49,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447809331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:49,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:49,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:49,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204797005] [2021-08-06 14:23:49,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:49,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:49,776 INFO L87 Difference]: Start difference. First operand 58 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:50,035 INFO L93 Difference]: Finished difference Result 88 states and 176 transitions. [2021-08-06 14:23:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:23:50,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:50,036 INFO L225 Difference]: With dead ends: 88 [2021-08-06 14:23:50,036 INFO L226 Difference]: Without dead ends: 83 [2021-08-06 14:23:50,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:23:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-06 14:23:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2021-08-06 14:23:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 132 transitions. [2021-08-06 14:23:50,038 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 132 transitions. Word has length 13 [2021-08-06 14:23:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:50,038 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 132 transitions. [2021-08-06 14:23:50,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 132 transitions. [2021-08-06 14:23:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:50,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:50,038 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:50,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:50,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:50,239 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:50,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2017543025, now seen corresponding path program 20 times [2021-08-06 14:23:50,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:50,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115150069] [2021-08-06 14:23:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:50,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:50,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:50,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115150069] [2021-08-06 14:23:50,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115150069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:50,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679460397] [2021-08-06 14:23:50,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:50,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:50,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:50,318 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:50,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:23:50,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:50,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:50,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:50,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:50,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:50,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679460397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:50,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:50,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:50,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772629683] [2021-08-06 14:23:50,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:50,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:50,843 INFO L87 Difference]: Start difference. First operand 59 states and 132 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:51,011 INFO L93 Difference]: Finished difference Result 82 states and 169 transitions. [2021-08-06 14:23:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:23:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:51,012 INFO L225 Difference]: With dead ends: 82 [2021-08-06 14:23:51,012 INFO L226 Difference]: Without dead ends: 82 [2021-08-06 14:23:51,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:23:51,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-06 14:23:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2021-08-06 14:23:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 118 transitions. [2021-08-06 14:23:51,013 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 118 transitions. Word has length 13 [2021-08-06 14:23:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:51,013 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 118 transitions. [2021-08-06 14:23:51,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 118 transitions. [2021-08-06 14:23:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:51,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:51,014 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:51,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:51,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:51,229 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash 566810963, now seen corresponding path program 21 times [2021-08-06 14:23:51,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:51,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395989388] [2021-08-06 14:23:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:51,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:51,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:51,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395989388] [2021-08-06 14:23:51,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395989388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:51,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393516808] [2021-08-06 14:23:51,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:51,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:51,305 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:51,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:23:51,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:23:51,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:51,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:51,821 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:51,821 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 41 treesize of output 38 [2021-08-06 14:23:51,827 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:51,827 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 34 treesize of output 29 [2021-08-06 14:23:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:51,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393516808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:51,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:51,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:51,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629608352] [2021-08-06 14:23:51,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:51,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:51,869 INFO L87 Difference]: Start difference. First operand 55 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:51,957 INFO L93 Difference]: Finished difference Result 76 states and 161 transitions. [2021-08-06 14:23:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:23:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:51,958 INFO L225 Difference]: With dead ends: 76 [2021-08-06 14:23:51,958 INFO L226 Difference]: Without dead ends: 76 [2021-08-06 14:23:51,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-06 14:23:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2021-08-06 14:23:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 123 transitions. [2021-08-06 14:23:51,960 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 123 transitions. Word has length 13 [2021-08-06 14:23:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:51,960 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 123 transitions. [2021-08-06 14:23:51,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 123 transitions. [2021-08-06 14:23:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:51,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:51,961 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:51,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:52,181 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,SelfDestructingSolverStorable34 [2021-08-06 14:23:52,181 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1546997875, now seen corresponding path program 22 times [2021-08-06 14:23:52,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:52,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138087662] [2021-08-06 14:23:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:52,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:52,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:52,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138087662] [2021-08-06 14:23:52,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138087662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:52,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811268615] [2021-08-06 14:23:52,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:52,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:52,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:52,270 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:52,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 14:23:52,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:52,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:23:52,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:23:52,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:23:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:52,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811268615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:52,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:52,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:52,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451647700] [2021-08-06 14:23:52,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:52,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:52,809 INFO L87 Difference]: Start difference. First operand 57 states and 123 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:52,919 INFO L93 Difference]: Finished difference Result 83 states and 173 transitions. [2021-08-06 14:23:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:52,920 INFO L225 Difference]: With dead ends: 83 [2021-08-06 14:23:52,920 INFO L226 Difference]: Without dead ends: 83 [2021-08-06 14:23:52,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-06 14:23:52,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-08-06 14:23:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2181818181818183) internal successors, (122), 55 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 122 transitions. [2021-08-06 14:23:52,922 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 122 transitions. Word has length 13 [2021-08-06 14:23:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:52,922 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 122 transitions. [2021-08-06 14:23:52,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 122 transitions. [2021-08-06 14:23:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:52,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:52,922 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:52,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:53,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 14:23:53,141 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1390433691, now seen corresponding path program 23 times [2021-08-06 14:23:53,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:53,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582650748] [2021-08-06 14:23:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:53,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:53,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:53,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582650748] [2021-08-06 14:23:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582650748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:53,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802909021] [2021-08-06 14:23:53,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:53,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:53,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:53,214 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:53,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 14:23:53,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:53,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:53,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:53,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:53,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:23:53,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:23:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:53,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802909021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:53,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:53,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:53,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168312672] [2021-08-06 14:23:53,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:53,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:53,797 INFO L87 Difference]: Start difference. First operand 56 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:53,978 INFO L93 Difference]: Finished difference Result 81 states and 166 transitions. [2021-08-06 14:23:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:23:53,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:53,978 INFO L225 Difference]: With dead ends: 81 [2021-08-06 14:23:53,978 INFO L226 Difference]: Without dead ends: 78 [2021-08-06 14:23:53,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:53,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-06 14:23:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-08-06 14:23:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 121 transitions. [2021-08-06 14:23:53,980 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 121 transitions. Word has length 13 [2021-08-06 14:23:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:53,980 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 121 transitions. [2021-08-06 14:23:53,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 121 transitions. [2021-08-06 14:23:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:53,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:53,981 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:53,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:54,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 14:23:54,193 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1413378091, now seen corresponding path program 24 times [2021-08-06 14:23:54,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:54,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46911817] [2021-08-06 14:23:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:54,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:54,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:54,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46911817] [2021-08-06 14:23:54,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46911817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:54,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091583811] [2021-08-06 14:23:54,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:54,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:54,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:54,264 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:54,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 14:23:54,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:23:54,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:54,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:54,774 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:54,774 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 41 treesize of output 38 [2021-08-06 14:23:54,782 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:54,782 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 34 treesize of output 29 [2021-08-06 14:23:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:54,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091583811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:54,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:54,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:54,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109475620] [2021-08-06 14:23:54,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:54,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:54,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:54,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:54,816 INFO L87 Difference]: Start difference. First operand 56 states and 121 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:54,872 INFO L93 Difference]: Finished difference Result 83 states and 172 transitions. [2021-08-06 14:23:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:23:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:54,873 INFO L225 Difference]: With dead ends: 83 [2021-08-06 14:23:54,873 INFO L226 Difference]: Without dead ends: 83 [2021-08-06 14:23:54,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-06 14:23:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-08-06 14:23:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2) internal successors, (121), 55 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 121 transitions. [2021-08-06 14:23:54,875 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 121 transitions. Word has length 13 [2021-08-06 14:23:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:54,875 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 121 transitions. [2021-08-06 14:23:54,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 121 transitions. [2021-08-06 14:23:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:54,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:54,875 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:54,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:55,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:55,093 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1961888497, now seen corresponding path program 25 times [2021-08-06 14:23:55,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:55,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013966832] [2021-08-06 14:23:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:55,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:55,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:55,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013966832] [2021-08-06 14:23:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013966832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:55,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599050651] [2021-08-06 14:23:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:55,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:55,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:55,180 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:55,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 14:23:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:55,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:55,769 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:55,769 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 43 treesize of output 40 [2021-08-06 14:23:55,774 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:23:55,774 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 34 [2021-08-06 14:23:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:55,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599050651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:55,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:55,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:55,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950292261] [2021-08-06 14:23:55,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:55,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:55,853 INFO L87 Difference]: Start difference. First operand 56 states and 121 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:56,047 INFO L93 Difference]: Finished difference Result 82 states and 167 transitions. [2021-08-06 14:23:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:23:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:56,048 INFO L225 Difference]: With dead ends: 82 [2021-08-06 14:23:56,048 INFO L226 Difference]: Without dead ends: 80 [2021-08-06 14:23:56,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:23:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-06 14:23:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2021-08-06 14:23:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 120 transitions. [2021-08-06 14:23:56,049 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 120 transitions. Word has length 13 [2021-08-06 14:23:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:56,049 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 120 transitions. [2021-08-06 14:23:56,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 120 transitions. [2021-08-06 14:23:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:56,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:56,050 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:56,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:56,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 14:23:56,250 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:56,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1405647693, now seen corresponding path program 26 times [2021-08-06 14:23:56,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:56,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76580269] [2021-08-06 14:23:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:56,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:56,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:56,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76580269] [2021-08-06 14:23:56,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76580269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:56,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756978469] [2021-08-06 14:23:56,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:56,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:56,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:56,334 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:56,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 14:23:56,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:56,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:56,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:56,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:56,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:56,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:56,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756978469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:56,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:56,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:56,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712697126] [2021-08-06 14:23:56,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:56,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:56,968 INFO L87 Difference]: Start difference. First operand 56 states and 120 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:57,218 INFO L93 Difference]: Finished difference Result 122 states and 232 transitions. [2021-08-06 14:23:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:23:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:23:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:57,219 INFO L225 Difference]: With dead ends: 122 [2021-08-06 14:23:57,219 INFO L226 Difference]: Without dead ends: 122 [2021-08-06 14:23:57,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:23:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-06 14:23:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2021-08-06 14:23:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.2586206896551726) internal successors, (131), 58 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2021-08-06 14:23:57,221 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 13 [2021-08-06 14:23:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:57,221 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2021-08-06 14:23:57,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:23:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2021-08-06 14:23:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:57,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:57,221 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:57,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:57,422 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,SelfDestructingSolverStorable39 [2021-08-06 14:23:57,422 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:57,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash -604031465, now seen corresponding path program 27 times [2021-08-06 14:23:57,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:57,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423329146] [2021-08-06 14:23:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:57,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:57,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:57,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423329146] [2021-08-06 14:23:57,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423329146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:57,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078486742] [2021-08-06 14:23:57,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:57,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:57,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:57,511 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:57,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 14:23:57,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:23:57,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:58,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:58,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:58,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:58,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:58,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078486742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:58,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:58,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:58,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192454020] [2021-08-06 14:23:58,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:58,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:58,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:58,206 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:58,650 INFO L93 Difference]: Finished difference Result 115 states and 220 transitions. [2021-08-06 14:23:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:23:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:58,651 INFO L225 Difference]: With dead ends: 115 [2021-08-06 14:23:58,651 INFO L226 Difference]: Without dead ends: 112 [2021-08-06 14:23:58,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:23:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-06 14:23:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 60. [2021-08-06 14:23:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 133 transitions. [2021-08-06 14:23:58,652 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 133 transitions. Word has length 13 [2021-08-06 14:23:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:58,653 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 133 transitions. [2021-08-06 14:23:58,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 133 transitions. [2021-08-06 14:23:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:58,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:58,653 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:58,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 14:23:58,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:58,853 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:23:58,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1114312241, now seen corresponding path program 28 times [2021-08-06 14:23:58,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:58,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795930017] [2021-08-06 14:23:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:58,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:58,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:58,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795930017] [2021-08-06 14:23:58,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795930017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:58,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270304472] [2021-08-06 14:23:58,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:58,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:58,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:58,940 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 14:23:59,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:59,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:59,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:23:59,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:59,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:59,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:23:59,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:23:59,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:23:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:59,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270304472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:59,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:59,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:59,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978942686] [2021-08-06 14:23:59,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:59,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:59,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:59,600 INFO L87 Difference]: Start difference. First operand 60 states and 133 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:59,837 INFO L93 Difference]: Finished difference Result 105 states and 205 transitions. [2021-08-06 14:23:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:23:59,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:23:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:59,838 INFO L225 Difference]: With dead ends: 105 [2021-08-06 14:23:59,838 INFO L226 Difference]: Without dead ends: 105 [2021-08-06 14:23:59,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:23:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-06 14:23:59,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 58. [2021-08-06 14:23:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 125 transitions. [2021-08-06 14:23:59,840 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 125 transitions. Word has length 13 [2021-08-06 14:23:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:59,840 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 125 transitions. [2021-08-06 14:23:59,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 125 transitions. [2021-08-06 14:23:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:23:59,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:59,840 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:59,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:00,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:00,041 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash 732792669, now seen corresponding path program 29 times [2021-08-06 14:24:00,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:00,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683340915] [2021-08-06 14:24:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:00,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:00,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:00,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683340915] [2021-08-06 14:24:00,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683340915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:00,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371586545] [2021-08-06 14:24:00,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:00,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:00,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:00,118 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:00,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 14:24:00,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:00,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:24:00,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:00,762 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:00,762 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 41 treesize of output 38 [2021-08-06 14:24:00,767 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:00,768 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 34 treesize of output 29 [2021-08-06 14:24:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:00,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371586545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:00,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:00,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:00,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574493112] [2021-08-06 14:24:00,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:00,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:00,801 INFO L87 Difference]: Start difference. First operand 58 states and 125 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:24:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:00,896 INFO L93 Difference]: Finished difference Result 94 states and 191 transitions. [2021-08-06 14:24:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:24:00,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:24:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:00,896 INFO L225 Difference]: With dead ends: 94 [2021-08-06 14:24:00,896 INFO L226 Difference]: Without dead ends: 94 [2021-08-06 14:24:00,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-06 14:24:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2021-08-06 14:24:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 61 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 140 transitions. [2021-08-06 14:24:00,898 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 140 transitions. Word has length 13 [2021-08-06 14:24:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:00,898 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 140 transitions. [2021-08-06 14:24:00,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:24:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 140 transitions. [2021-08-06 14:24:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:24:00,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:00,899 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:00,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:01,115 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,SelfDestructingSolverStorable42 [2021-08-06 14:24:01,116 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash -186908039, now seen corresponding path program 30 times [2021-08-06 14:24:01,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:01,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521021051] [2021-08-06 14:24:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:01,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:01,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:01,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521021051] [2021-08-06 14:24:01,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521021051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:01,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173667195] [2021-08-06 14:24:01,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:01,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:01,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:01,179 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:01,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 14:24:01,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:24:01,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:01,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:24:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:01,820 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:01,820 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 43 treesize of output 40 [2021-08-06 14:24:01,825 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:01,825 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 34 [2021-08-06 14:24:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:01,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173667195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:01,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:01,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:01,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822800069] [2021-08-06 14:24:01,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:01,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:01,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:01,887 INFO L87 Difference]: Start difference. First operand 62 states and 140 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:02,054 INFO L93 Difference]: Finished difference Result 82 states and 168 transitions. [2021-08-06 14:24:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:24:02,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:24:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:02,055 INFO L225 Difference]: With dead ends: 82 [2021-08-06 14:24:02,055 INFO L226 Difference]: Without dead ends: 79 [2021-08-06 14:24:02,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:24:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-06 14:24:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-08-06 14:24:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.278688524590164) internal successors, (139), 61 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 139 transitions. [2021-08-06 14:24:02,057 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 139 transitions. Word has length 13 [2021-08-06 14:24:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:02,057 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 139 transitions. [2021-08-06 14:24:02,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 139 transitions. [2021-08-06 14:24:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:24:02,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:02,057 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:02,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:02,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:02,258 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash 740523067, now seen corresponding path program 31 times [2021-08-06 14:24:02,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:02,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875147219] [2021-08-06 14:24:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:02,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:02,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:02,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875147219] [2021-08-06 14:24:02,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875147219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:02,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678471123] [2021-08-06 14:24:02,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:02,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:02,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:02,326 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:02,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 14:24:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:02,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:24:02,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:02,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:02,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:02,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:02,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:03,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678471123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:03,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:03,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:03,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257356521] [2021-08-06 14:24:03,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:03,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:03,009 INFO L87 Difference]: Start difference. First operand 62 states and 139 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:24:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:03,154 INFO L93 Difference]: Finished difference Result 104 states and 201 transitions. [2021-08-06 14:24:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:24:03,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:24:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:03,159 INFO L225 Difference]: With dead ends: 104 [2021-08-06 14:24:03,159 INFO L226 Difference]: Without dead ends: 103 [2021-08-06 14:24:03,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-06 14:24:03,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2021-08-06 14:24:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 137 transitions. [2021-08-06 14:24:03,162 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 137 transitions. Word has length 13 [2021-08-06 14:24:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:03,162 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 137 transitions. [2021-08-06 14:24:03,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:24:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 137 transitions. [2021-08-06 14:24:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:24:03,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:03,163 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:03,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:03,380 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,SelfDestructingSolverStorable44 [2021-08-06 14:24:03,381 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1542139295, now seen corresponding path program 32 times [2021-08-06 14:24:03,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:03,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071153854] [2021-08-06 14:24:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:03,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:03,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:03,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071153854] [2021-08-06 14:24:03,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071153854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:03,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197341337] [2021-08-06 14:24:03,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:03,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:03,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:03,451 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:03,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 14:24:03,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:03,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:24:03,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:04,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:04,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:04,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:04,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:04,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197341337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:04,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:04,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:04,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389488905] [2021-08-06 14:24:04,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:04,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:04,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:04,156 INFO L87 Difference]: Start difference. First operand 62 states and 137 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:04,329 INFO L93 Difference]: Finished difference Result 83 states and 167 transitions. [2021-08-06 14:24:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:24:04,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:24:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:04,330 INFO L225 Difference]: With dead ends: 83 [2021-08-06 14:24:04,330 INFO L226 Difference]: Without dead ends: 79 [2021-08-06 14:24:04,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-06 14:24:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-08-06 14:24:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 138 transitions. [2021-08-06 14:24:04,332 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 138 transitions. Word has length 13 [2021-08-06 14:24:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:04,332 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 138 transitions. [2021-08-06 14:24:04,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 138 transitions. [2021-08-06 14:24:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:24:04,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:04,332 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:04,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:04,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:04,533 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:04,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1034484295, now seen corresponding path program 33 times [2021-08-06 14:24:04,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:04,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256576777] [2021-08-06 14:24:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:04,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:04,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:04,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256576777] [2021-08-06 14:24:04,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256576777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:04,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917061963] [2021-08-06 14:24:04,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:04,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:04,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:04,607 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:04,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 14:24:05,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:24:05,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:05,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 14:24:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:05,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:05,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:05,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:05,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:05,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917061963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:05,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:05,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:05,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125110004] [2021-08-06 14:24:05,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:05,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:05,331 INFO L87 Difference]: Start difference. First operand 63 states and 138 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:05,430 INFO L93 Difference]: Finished difference Result 76 states and 161 transitions. [2021-08-06 14:24:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:24:05,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:24:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:05,443 INFO L225 Difference]: With dead ends: 76 [2021-08-06 14:24:05,443 INFO L226 Difference]: Without dead ends: 76 [2021-08-06 14:24:05,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-06 14:24:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2021-08-06 14:24:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 125 transitions. [2021-08-06 14:24:05,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 125 transitions. Word has length 13 [2021-08-06 14:24:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:05,445 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 125 transitions. [2021-08-06 14:24:05,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:05,445 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 125 transitions. [2021-08-06 14:24:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:24:05,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:05,445 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:05,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 14:24:05,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 14:24:05,664 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:05,665 INFO L82 PathProgramCache]: Analyzing trace with hash -748881929, now seen corresponding path program 34 times [2021-08-06 14:24:05,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:05,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177791133] [2021-08-06 14:24:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:05,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:05,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:05,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177791133] [2021-08-06 14:24:05,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177791133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:05,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277810066] [2021-08-06 14:24:05,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:05,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:05,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:05,737 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:05,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 14:24:06,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:06,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:24:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:06,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:06,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:06,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:06,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277810066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:06,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:06,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:06,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506505149] [2021-08-06 14:24:06,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:06,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:06,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:06,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:06,463 INFO L87 Difference]: Start difference. First operand 58 states and 125 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:24:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:06,603 INFO L93 Difference]: Finished difference Result 108 states and 206 transitions. [2021-08-06 14:24:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:24:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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 13 [2021-08-06 14:24:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:06,604 INFO L225 Difference]: With dead ends: 108 [2021-08-06 14:24:06,604 INFO L226 Difference]: Without dead ends: 108 [2021-08-06 14:24:06,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-06 14:24:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 60. [2021-08-06 14:24:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 133 transitions. [2021-08-06 14:24:06,605 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 133 transitions. Word has length 13 [2021-08-06 14:24:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:06,606 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 133 transitions. [2021-08-06 14:24:06,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 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) [2021-08-06 14:24:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 133 transitions. [2021-08-06 14:24:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:24:06,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:06,606 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:06,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:06,824 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,SelfDestructingSolverStorable47 [2021-08-06 14:24:06,824 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash 52734299, now seen corresponding path program 35 times [2021-08-06 14:24:06,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:06,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078184379] [2021-08-06 14:24:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:06,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:06,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:06,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078184379] [2021-08-06 14:24:06,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078184379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:06,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124367162] [2021-08-06 14:24:06,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:06,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:06,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:06,899 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:06,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 14:24:07,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:24:07,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:24:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:07,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:07,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:07,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:07,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:07,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124367162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:07,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:07,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:07,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647208690] [2021-08-06 14:24:07,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:07,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:07,683 INFO L87 Difference]: Start difference. First operand 60 states and 133 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:07,858 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-08-06 14:24:07,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:24:07,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:24:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:07,859 INFO L225 Difference]: With dead ends: 88 [2021-08-06 14:24:07,859 INFO L226 Difference]: Without dead ends: 83 [2021-08-06 14:24:07,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-06 14:24:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-08-06 14:24:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 60 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 134 transitions. [2021-08-06 14:24:07,861 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 134 transitions. Word has length 13 [2021-08-06 14:24:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:07,861 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 134 transitions. [2021-08-06 14:24:07,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 134 transitions. [2021-08-06 14:24:07,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:24:07,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:07,861 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:07,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 14:24:08,062 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,SelfDestructingSolverStorable48 [2021-08-06 14:24:08,062 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:08,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1771078005, now seen corresponding path program 36 times [2021-08-06 14:24:08,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:08,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197208847] [2021-08-06 14:24:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:08,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:08,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:08,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197208847] [2021-08-06 14:24:08,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197208847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:08,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277337034] [2021-08-06 14:24:08,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:08,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:08,164 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:08,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 14:24:08,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:24:08,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:24:08,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:08,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:08,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:08,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:08,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:08,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277337034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:08,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:08,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:08,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998091972] [2021-08-06 14:24:08,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:08,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:08,931 INFO L87 Difference]: Start difference. First operand 61 states and 134 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:09,061 INFO L93 Difference]: Finished difference Result 82 states and 166 transitions. [2021-08-06 14:24:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:24:09,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:24:09,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:09,062 INFO L225 Difference]: With dead ends: 82 [2021-08-06 14:24:09,062 INFO L226 Difference]: Without dead ends: 82 [2021-08-06 14:24:09,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-06 14:24:09,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 57. [2021-08-06 14:24:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 120 transitions. [2021-08-06 14:24:09,063 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 120 transitions. Word has length 13 [2021-08-06 14:24:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:09,063 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 120 transitions. [2021-08-06 14:24:09,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 120 transitions. [2021-08-06 14:24:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 14:24:09,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:09,064 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:09,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 14:24:09,281 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,SelfDestructingSolverStorable49 [2021-08-06 14:24:09,282 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:09,282 INFO L82 PathProgramCache]: Analyzing trace with hash 60464697, now seen corresponding path program 37 times [2021-08-06 14:24:09,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:09,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169624636] [2021-08-06 14:24:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:09,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:09,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:09,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169624636] [2021-08-06 14:24:09,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169624636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:09,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806560937] [2021-08-06 14:24:09,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:09,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:09,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:09,343 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:09,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 14:24:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:09,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 14:24:09,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:10,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:10,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:24:10,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:10,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:24:10,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:10,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:24:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:10,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806560937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:10,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:10,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:10,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117270273] [2021-08-06 14:24:10,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:10,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:10,116 INFO L87 Difference]: Start difference. First operand 57 states and 120 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:10,206 INFO L93 Difference]: Finished difference Result 76 states and 158 transitions. [2021-08-06 14:24:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:24:10,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 14:24:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:10,207 INFO L225 Difference]: With dead ends: 76 [2021-08-06 14:24:10,208 INFO L226 Difference]: Without dead ends: 76 [2021-08-06 14:24:10,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-06 14:24:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-08-06 14:24:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 54 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 116 transitions. [2021-08-06 14:24:10,209 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 116 transitions. Word has length 13 [2021-08-06 14:24:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:10,209 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 116 transitions. [2021-08-06 14:24:10,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:10,209 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 116 transitions. [2021-08-06 14:24:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:10,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:10,210 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:10,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:10,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:10,426 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:10,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:10,426 INFO L82 PathProgramCache]: Analyzing trace with hash -127183777, now seen corresponding path program 38 times [2021-08-06 14:24:10,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:10,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446252082] [2021-08-06 14:24:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:10,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:10,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:10,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446252082] [2021-08-06 14:24:10,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446252082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:10,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940511912] [2021-08-06 14:24:10,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:10,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:10,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:10,899 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:10,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 14:24:11,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:11,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:11,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:12,185 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:12,185 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 85 treesize of output 72 [2021-08-06 14:24:12,191 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:12,191 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 62 treesize of output 53 [2021-08-06 14:24:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:12,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940511912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:12,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:12,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 14:24:12,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74934652] [2021-08-06 14:24:12,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:12,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:12,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:12,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:12,271 INFO L87 Difference]: Start difference. First operand 55 states and 116 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:13,560 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-08-06 14:24:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:24:13,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 14 [2021-08-06 14:24:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:13,561 INFO L225 Difference]: With dead ends: 106 [2021-08-06 14:24:13,561 INFO L226 Difference]: Without dead ends: 97 [2021-08-06 14:24:13,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1344.9ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:24:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-06 14:24:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2021-08-06 14:24:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 142 transitions. [2021-08-06 14:24:13,563 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 142 transitions. Word has length 14 [2021-08-06 14:24:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:13,563 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 142 transitions. [2021-08-06 14:24:13,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 142 transitions. [2021-08-06 14:24:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:13,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:13,563 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:13,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 14:24:13,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:13,764 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:13,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1602893341, now seen corresponding path program 39 times [2021-08-06 14:24:13,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:13,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487193310] [2021-08-06 14:24:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:13,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:14,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:14,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487193310] [2021-08-06 14:24:14,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487193310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:14,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214627397] [2021-08-06 14:24:14,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:14,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:14,100 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:14,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 14:24:14,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:24:14,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:14,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:15,261 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 14:24:15,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 70 [2021-08-06 14:24:15,267 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:15,267 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 62 treesize of output 53 [2021-08-06 14:24:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:15,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214627397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:15,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:15,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 14:24:15,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627471502] [2021-08-06 14:24:15,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:24:15,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:15,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:24:15,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:15,332 INFO L87 Difference]: Start difference. First operand 67 states and 142 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:15,898 INFO L93 Difference]: Finished difference Result 131 states and 264 transitions. [2021-08-06 14:24:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:24:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:24:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:15,899 INFO L225 Difference]: With dead ends: 131 [2021-08-06 14:24:15,899 INFO L226 Difference]: Without dead ends: 128 [2021-08-06 14:24:15,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:24:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-06 14:24:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 82. [2021-08-06 14:24:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2962962962962963) internal successors, (186), 81 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 186 transitions. [2021-08-06 14:24:15,901 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 186 transitions. Word has length 14 [2021-08-06 14:24:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:15,901 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 186 transitions. [2021-08-06 14:24:15,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 186 transitions. [2021-08-06 14:24:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:15,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:15,902 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:15,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:16,102 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,SelfDestructingSolverStorable52 [2021-08-06 14:24:16,102 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1595162943, now seen corresponding path program 40 times [2021-08-06 14:24:16,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:16,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704689807] [2021-08-06 14:24:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:16,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:16,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:16,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704689807] [2021-08-06 14:24:16,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704689807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:16,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579792925] [2021-08-06 14:24:16,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:16,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:16,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:16,399 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:16,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 14:24:17,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:17,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:17,572 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:17,573 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 85 treesize of output 72 [2021-08-06 14:24:17,578 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:17,578 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 62 treesize of output 53 [2021-08-06 14:24:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:17,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579792925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:17,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:17,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 14:24:17,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498535320] [2021-08-06 14:24:17,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:24:17,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:24:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:17,637 INFO L87 Difference]: Start difference. First operand 82 states and 186 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-08-06 14:24:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:18,158 INFO L93 Difference]: Finished difference Result 106 states and 228 transitions. [2021-08-06 14:24:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:24:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 14 [2021-08-06 14:24:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:18,158 INFO L225 Difference]: With dead ends: 106 [2021-08-06 14:24:18,158 INFO L226 Difference]: Without dead ends: 99 [2021-08-06 14:24:18,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:24:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-06 14:24:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-08-06 14:24:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.292682926829268) internal successors, (188), 82 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 188 transitions. [2021-08-06 14:24:18,160 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 188 transitions. Word has length 14 [2021-08-06 14:24:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:18,160 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 188 transitions. [2021-08-06 14:24:18,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-08-06 14:24:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 188 transitions. [2021-08-06 14:24:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:18,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:18,161 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:18,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:18,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:18,361 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:18,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1210399357, now seen corresponding path program 41 times [2021-08-06 14:24:18,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:18,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455404769] [2021-08-06 14:24:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:18,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:18,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:18,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455404769] [2021-08-06 14:24:18,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455404769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:18,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526188624] [2021-08-06 14:24:18,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:18,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:18,753 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:18,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 14:24:19,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:24:19,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:19,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:19,961 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:19,961 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 86 treesize of output 73 [2021-08-06 14:24:19,967 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:19,967 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 63 treesize of output 54 [2021-08-06 14:24:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:20,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526188624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:20,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:20,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 14:24:20,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555505972] [2021-08-06 14:24:20,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:20,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:20,058 INFO L87 Difference]: Start difference. First operand 83 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:20,441 INFO L93 Difference]: Finished difference Result 102 states and 225 transitions. [2021-08-06 14:24:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:24:20,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 14 [2021-08-06 14:24:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:20,442 INFO L225 Difference]: With dead ends: 102 [2021-08-06 14:24:20,443 INFO L226 Difference]: Without dead ends: 99 [2021-08-06 14:24:20,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:24:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-06 14:24:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2021-08-06 14:24:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2021-08-06 14:24:20,445 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 14 [2021-08-06 14:24:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:20,445 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2021-08-06 14:24:20,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2021-08-06 14:24:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:20,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:20,445 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:20,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 14:24:20,645 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,SelfDestructingSolverStorable54 [2021-08-06 14:24:20,646 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash -221091617, now seen corresponding path program 42 times [2021-08-06 14:24:20,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:20,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066170447] [2021-08-06 14:24:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:20,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:20,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:20,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066170447] [2021-08-06 14:24:20,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066170447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:20,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261590577] [2021-08-06 14:24:20,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:20,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:20,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:20,908 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:20,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 14:24:21,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:24:21,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:21,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:22,038 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 14:24:22,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 70 [2021-08-06 14:24:22,044 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:22,045 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 62 treesize of output 53 [2021-08-06 14:24:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:22,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261590577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:22,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:22,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 14:24:22,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278655733] [2021-08-06 14:24:22,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:24:22,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:24:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:22,104 INFO L87 Difference]: Start difference. First operand 84 states and 191 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:22,355 INFO L93 Difference]: Finished difference Result 97 states and 216 transitions. [2021-08-06 14:24:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:24:22,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:24:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:22,356 INFO L225 Difference]: With dead ends: 97 [2021-08-06 14:24:22,356 INFO L226 Difference]: Without dead ends: 94 [2021-08-06 14:24:22,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:22,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-06 14:24:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-08-06 14:24:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 198 transitions. [2021-08-06 14:24:22,357 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 198 transitions. Word has length 14 [2021-08-06 14:24:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:22,358 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 198 transitions. [2021-08-06 14:24:22,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 198 transitions. [2021-08-06 14:24:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:22,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:22,358 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:22,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:22,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:22,559 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash 26281119, now seen corresponding path program 43 times [2021-08-06 14:24:22,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:22,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136075106] [2021-08-06 14:24:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:22,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:22,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:22,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136075106] [2021-08-06 14:24:22,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136075106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:22,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086460090] [2021-08-06 14:24:22,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:22,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:22,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:22,961 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:22,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 14:24:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:23,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:24,245 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:24,246 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 85 treesize of output 72 [2021-08-06 14:24:24,251 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:24,251 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 62 treesize of output 53 [2021-08-06 14:24:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086460090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:24,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:24,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-06 14:24:24,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102990970] [2021-08-06 14:24:24,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:24:24,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:24,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:24:24,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:24,325 INFO L87 Difference]: Start difference. First operand 87 states and 198 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2021-08-06 14:24:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:24,794 INFO L93 Difference]: Finished difference Result 103 states and 227 transitions. [2021-08-06 14:24:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:24:24,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 14 [2021-08-06 14:24:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:24,795 INFO L225 Difference]: With dead ends: 103 [2021-08-06 14:24:24,795 INFO L226 Difference]: Without dead ends: 100 [2021-08-06 14:24:24,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:24:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-06 14:24:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2021-08-06 14:24:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.32183908045977) internal successors, (202), 87 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 202 transitions. [2021-08-06 14:24:24,797 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 202 transitions. Word has length 14 [2021-08-06 14:24:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:24,797 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 202 transitions. [2021-08-06 14:24:24,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2021-08-06 14:24:24,797 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 202 transitions. [2021-08-06 14:24:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:24,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:24,798 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:24,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:24,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:24,998 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:24,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -390038497, now seen corresponding path program 44 times [2021-08-06 14:24:24,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:24,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602068690] [2021-08-06 14:24:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:24,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:25,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:25,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602068690] [2021-08-06 14:24:25,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602068690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:25,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124166828] [2021-08-06 14:24:25,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:25,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:25,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:25,169 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:25,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 14:24:25,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:26,388 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:26,388 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 85 treesize of output 72 [2021-08-06 14:24:26,394 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:26,394 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 62 treesize of output 53 [2021-08-06 14:24:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:26,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124166828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:26,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:26,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 14:24:26,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164304213] [2021-08-06 14:24:26,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:24:26,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:26,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:24:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:26,482 INFO L87 Difference]: Start difference. First operand 88 states and 202 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2021-08-06 14:24:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:26,711 INFO L93 Difference]: Finished difference Result 147 states and 311 transitions. [2021-08-06 14:24:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:24:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 14 [2021-08-06 14:24:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:26,712 INFO L225 Difference]: With dead ends: 147 [2021-08-06 14:24:26,712 INFO L226 Difference]: Without dead ends: 144 [2021-08-06 14:24:26,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-06 14:24:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 103. [2021-08-06 14:24:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.411764705882353) internal successors, (246), 102 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 246 transitions. [2021-08-06 14:24:26,714 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 246 transitions. Word has length 14 [2021-08-06 14:24:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:26,714 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 246 transitions. [2021-08-06 14:24:26,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2021-08-06 14:24:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 246 transitions. [2021-08-06 14:24:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:26,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:26,715 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:26,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:26,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-06 14:24:26,915 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash 732600931, now seen corresponding path program 45 times [2021-08-06 14:24:26,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:26,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601345684] [2021-08-06 14:24:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:26,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:27,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:27,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601345684] [2021-08-06 14:24:27,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601345684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:27,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335124909] [2021-08-06 14:24:27,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:27,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:27,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:27,521 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:27,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 14:24:28,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:24:28,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:28,907 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:28,908 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 85 treesize of output 72 [2021-08-06 14:24:28,914 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:28,915 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 62 treesize of output 53 [2021-08-06 14:24:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:29,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335124909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:29,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:29,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-06 14:24:29,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81602509] [2021-08-06 14:24:29,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:24:29,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:29,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:24:29,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:29,002 INFO L87 Difference]: Start difference. First operand 103 states and 246 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2021-08-06 14:24:29,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:29,820 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2021-08-06 14:24:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:24:29,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 14 [2021-08-06 14:24:29,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:29,821 INFO L225 Difference]: With dead ends: 157 [2021-08-06 14:24:29,821 INFO L226 Difference]: Without dead ends: 154 [2021-08-06 14:24:29,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 863.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:24:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-06 14:24:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 105. [2021-08-06 14:24:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.4038461538461537) internal successors, (250), 104 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 250 transitions. [2021-08-06 14:24:29,823 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 250 transitions. Word has length 14 [2021-08-06 14:24:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:29,823 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 250 transitions. [2021-08-06 14:24:29,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2021-08-06 14:24:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 250 transitions. [2021-08-06 14:24:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:29,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:29,824 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:29,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:30,032 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,SelfDestructingSolverStorable58 [2021-08-06 14:24:30,033 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:30,033 INFO L82 PathProgramCache]: Analyzing trace with hash -844740799, now seen corresponding path program 46 times [2021-08-06 14:24:30,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:30,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533187883] [2021-08-06 14:24:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:30,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:30,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:30,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533187883] [2021-08-06 14:24:30,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533187883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:30,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373040056] [2021-08-06 14:24:30,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:30,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:30,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:30,348 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:30,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 14:24:31,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:31,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:31,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:31,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:31,738 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:31,738 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 85 treesize of output 72 [2021-08-06 14:24:31,743 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:31,743 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 62 treesize of output 53 [2021-08-06 14:24:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:31,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373040056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:31,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:31,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 14:24:31,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083142633] [2021-08-06 14:24:31,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:31,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:31,809 INFO L87 Difference]: Start difference. First operand 105 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:32,243 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2021-08-06 14:24:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:24:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 14 [2021-08-06 14:24:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:32,243 INFO L225 Difference]: With dead ends: 134 [2021-08-06 14:24:32,244 INFO L226 Difference]: Without dead ends: 131 [2021-08-06 14:24:32,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:24:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-06 14:24:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2021-08-06 14:24:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.4038461538461537) internal successors, (250), 104 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 250 transitions. [2021-08-06 14:24:32,246 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 250 transitions. Word has length 14 [2021-08-06 14:24:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:32,246 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 250 transitions. [2021-08-06 14:24:32,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 250 transitions. [2021-08-06 14:24:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:32,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:32,246 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:32,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 14:24:32,447 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,SelfDestructingSolverStorable59 [2021-08-06 14:24:32,447 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash -605098461, now seen corresponding path program 47 times [2021-08-06 14:24:32,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:32,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797918409] [2021-08-06 14:24:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:32,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:32,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:32,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797918409] [2021-08-06 14:24:32,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797918409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:32,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413230770] [2021-08-06 14:24:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:32,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:32,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:32,715 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:32,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 14:24:33,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:33,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:33,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:33,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:34,169 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:34,170 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 85 treesize of output 72 [2021-08-06 14:24:34,176 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2021-08-06 14:24:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:34,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413230770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:34,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:34,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 14:24:34,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056717074] [2021-08-06 14:24:34,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:34,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:34,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:34,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:34,250 INFO L87 Difference]: Start difference. First operand 105 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:34,777 INFO L93 Difference]: Finished difference Result 151 states and 333 transitions. [2021-08-06 14:24:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:24:34,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 14 [2021-08-06 14:24:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:34,778 INFO L225 Difference]: With dead ends: 151 [2021-08-06 14:24:34,778 INFO L226 Difference]: Without dead ends: 144 [2021-08-06 14:24:34,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 631.3ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:24:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-06 14:24:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 106. [2021-08-06 14:24:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.4095238095238094) internal successors, (253), 105 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 253 transitions. [2021-08-06 14:24:34,780 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 253 transitions. Word has length 14 [2021-08-06 14:24:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:34,781 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 253 transitions. [2021-08-06 14:24:34,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 253 transitions. [2021-08-06 14:24:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:34,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:34,781 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:34,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:34,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:34,982 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:34,982 INFO L82 PathProgramCache]: Analyzing trace with hash -597368063, now seen corresponding path program 48 times [2021-08-06 14:24:34,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:34,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241953545] [2021-08-06 14:24:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:34,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:35,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:35,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241953545] [2021-08-06 14:24:35,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241953545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:35,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530205440] [2021-08-06 14:24:35,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:35,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:35,446 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:35,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 14:24:36,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:24:36,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:36,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:36,943 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 14:24:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 71 [2021-08-06 14:24:36,950 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:36,950 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 63 treesize of output 54 [2021-08-06 14:24:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:37,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530205440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:37,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:37,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-06 14:24:37,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658636086] [2021-08-06 14:24:37,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:24:37,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:37,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:24:37,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:37,043 INFO L87 Difference]: Start difference. First operand 106 states and 253 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2021-08-06 14:24:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:37,915 INFO L93 Difference]: Finished difference Result 153 states and 341 transitions. [2021-08-06 14:24:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:24:37,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 14 [2021-08-06 14:24:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:37,917 INFO L225 Difference]: With dead ends: 153 [2021-08-06 14:24:37,917 INFO L226 Difference]: Without dead ends: 147 [2021-08-06 14:24:37,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1043.5ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:24:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-06 14:24:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 109. [2021-08-06 14:24:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4444444444444446) internal successors, (264), 108 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 264 transitions. [2021-08-06 14:24:37,921 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 264 transitions. Word has length 14 [2021-08-06 14:24:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:37,921 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 264 transitions. [2021-08-06 14:24:37,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2021-08-06 14:24:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 264 transitions. [2021-08-06 14:24:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:37,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:37,922 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:37,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:38,139 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,SelfDestructingSolverStorable61 [2021-08-06 14:24:38,139 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:38,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1262043321, now seen corresponding path program 49 times [2021-08-06 14:24:38,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:38,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411199639] [2021-08-06 14:24:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:38,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:38,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:38,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411199639] [2021-08-06 14:24:38,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411199639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:38,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775282252] [2021-08-06 14:24:38,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:38,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:38,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:38,376 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:38,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 14:24:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:39,827 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:39,827 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 85 treesize of output 72 [2021-08-06 14:24:39,832 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:39,832 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 62 treesize of output 53 [2021-08-06 14:24:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:39,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775282252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:39,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:39,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 14:24:39,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527087473] [2021-08-06 14:24:39,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:24:39,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:24:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:39,888 INFO L87 Difference]: Start difference. First operand 109 states and 264 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:40,063 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2021-08-06 14:24:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:24:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:24:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:40,064 INFO L225 Difference]: With dead ends: 126 [2021-08-06 14:24:40,064 INFO L226 Difference]: Without dead ends: 123 [2021-08-06 14:24:40,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-06 14:24:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2021-08-06 14:24:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4444444444444446) internal successors, (264), 108 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 264 transitions. [2021-08-06 14:24:40,066 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 264 transitions. Word has length 14 [2021-08-06 14:24:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:40,066 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 264 transitions. [2021-08-06 14:24:40,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 264 transitions. [2021-08-06 14:24:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:40,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:40,067 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:40,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 14:24:40,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:40,287 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:40,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1509416057, now seen corresponding path program 50 times [2021-08-06 14:24:40,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:40,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011515407] [2021-08-06 14:24:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:40,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:40,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011515407] [2021-08-06 14:24:40,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011515407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:40,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384651802] [2021-08-06 14:24:40,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:40,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:40,711 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:40,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 14:24:41,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:41,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:41,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 14:24:41,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:42,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:24:42,222 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:42,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 89 [2021-08-06 14:24:42,229 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:42,230 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 81 treesize of output 68 [2021-08-06 14:24:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:42,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384651802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:42,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:42,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:24:42,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508490786] [2021-08-06 14:24:42,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:24:42,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:42,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:24:42,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:42,455 INFO L87 Difference]: Start difference. First operand 109 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-08-06 14:24:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:43,083 INFO L93 Difference]: Finished difference Result 164 states and 362 transitions. [2021-08-06 14:24:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:24:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 14 [2021-08-06 14:24:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:43,084 INFO L225 Difference]: With dead ends: 164 [2021-08-06 14:24:43,084 INFO L226 Difference]: Without dead ends: 157 [2021-08-06 14:24:43,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:24:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-06 14:24:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 112. [2021-08-06 14:24:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.4954954954954953) internal successors, (277), 111 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2021-08-06 14:24:43,087 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 14 [2021-08-06 14:24:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:43,087 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2021-08-06 14:24:43,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-08-06 14:24:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2021-08-06 14:24:43,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:43,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:43,087 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:43,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 14:24:43,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:43,288 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:43,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1720196257, now seen corresponding path program 51 times [2021-08-06 14:24:43,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:43,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380616229] [2021-08-06 14:24:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:43,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:43,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:43,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380616229] [2021-08-06 14:24:43,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380616229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:43,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212243870] [2021-08-06 14:24:43,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:43,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:43,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:43,551 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:43,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 14:24:44,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:24:44,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:44,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:45,144 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:24:45,145 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 85 treesize of output 72 [2021-08-06 14:24:45,151 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:45,151 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 62 treesize of output 53 [2021-08-06 14:24:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:45,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212243870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:45,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:45,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 14:24:45,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297461423] [2021-08-06 14:24:45,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:45,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:45,232 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:45,623 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2021-08-06 14:24:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:24:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 14 [2021-08-06 14:24:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:45,624 INFO L225 Difference]: With dead ends: 140 [2021-08-06 14:24:45,624 INFO L226 Difference]: Without dead ends: 137 [2021-08-06 14:24:45,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:24:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-06 14:24:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2021-08-06 14:24:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.4954954954954953) internal successors, (277), 111 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2021-08-06 14:24:45,626 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 14 [2021-08-06 14:24:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:45,626 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2021-08-06 14:24:45,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-08-06 14:24:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2021-08-06 14:24:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:24:45,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:45,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:45,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 14:24:45,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:45,833 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:45,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:45,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1093096441, now seen corresponding path program 52 times [2021-08-06 14:24:45,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:45,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529040622] [2021-08-06 14:24:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:45,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:46,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:46,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529040622] [2021-08-06 14:24:46,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529040622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:46,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131613874] [2021-08-06 14:24:46,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:46,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:46,033 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:46,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 14:24:47,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:47,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:47,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:24:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:47,478 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 14:24:47,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 70 [2021-08-06 14:24:47,484 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:47,484 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 62 treesize of output 53 [2021-08-06 14:24:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:47,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131613874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:47,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:47,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 14:24:47,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209684464] [2021-08-06 14:24:47,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:24:47,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:24:47,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:47,564 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2021-08-06 14:24:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:47,819 INFO L93 Difference]: Finished difference Result 174 states and 389 transitions. [2021-08-06 14:24:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:24:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 14 [2021-08-06 14:24:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:47,820 INFO L225 Difference]: With dead ends: 174 [2021-08-06 14:24:47,820 INFO L226 Difference]: Without dead ends: 171 [2021-08-06 14:24:47,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:24:47,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-06 14:24:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2021-08-06 14:24:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.4954954954954953) internal successors, (277), 111 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2021-08-06 14:24:47,822 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 14 [2021-08-06 14:24:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:47,822 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2021-08-06 14:24:47,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2021-08-06 14:24:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2021-08-06 14:24:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:47,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:47,823 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:47,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 14:24:48,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:48,043 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1964128883, now seen corresponding path program 53 times [2021-08-06 14:24:48,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:48,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640239789] [2021-08-06 14:24:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:48,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:48,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:48,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640239789] [2021-08-06 14:24:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640239789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:48,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062559047] [2021-08-06 14:24:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:48,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:48,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:48,152 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:48,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 14:24:49,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:24:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:49,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:24:49,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:49,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:24:49,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:24:49,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:24:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:49,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062559047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:49,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:49,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 14:24:49,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937823044] [2021-08-06 14:24:49,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:24:49,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:24:49,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:49,523 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:49,645 INFO L93 Difference]: Finished difference Result 154 states and 369 transitions. [2021-08-06 14:24:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:49,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:49,646 INFO L225 Difference]: With dead ends: 154 [2021-08-06 14:24:49,646 INFO L226 Difference]: Without dead ends: 154 [2021-08-06 14:24:49,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-06 14:24:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-08-06 14:24:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.5) internal successors, (280), 112 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 280 transitions. [2021-08-06 14:24:49,648 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 280 transitions. Word has length 15 [2021-08-06 14:24:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:49,648 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 280 transitions. [2021-08-06 14:24:49,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 280 transitions. [2021-08-06 14:24:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:49,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:49,648 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:49,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:49,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 14:24:49,861 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash -313196909, now seen corresponding path program 54 times [2021-08-06 14:24:49,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:49,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896104332] [2021-08-06 14:24:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:49,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:49,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:49,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896104332] [2021-08-06 14:24:49,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896104332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:49,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753767168] [2021-08-06 14:24:49,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:49,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:49,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:49,941 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:49,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 14:24:51,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:24:51,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:51,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:24:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:51,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:51,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:51,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:51,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:51,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753767168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:51,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:51,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:24:51,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900332143] [2021-08-06 14:24:51,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:51,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:51,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:51,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:51,385 INFO L87 Difference]: Start difference. First operand 113 states and 280 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:51,680 INFO L93 Difference]: Finished difference Result 199 states and 441 transitions. [2021-08-06 14:24:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:24:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:51,681 INFO L225 Difference]: With dead ends: 199 [2021-08-06 14:24:51,681 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 14:24:51,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:24:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 14:24:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 117. [2021-08-06 14:24:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.543103448275862) internal successors, (295), 116 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 295 transitions. [2021-08-06 14:24:51,683 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 295 transitions. Word has length 15 [2021-08-06 14:24:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:51,684 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 295 transitions. [2021-08-06 14:24:51,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 295 transitions. [2021-08-06 14:24:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:51,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:51,684 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:51,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:51,884 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,SelfDestructingSolverStorable67 [2021-08-06 14:24:51,885 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash 488419319, now seen corresponding path program 55 times [2021-08-06 14:24:51,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:51,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096579894] [2021-08-06 14:24:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:51,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:52,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:52,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096579894] [2021-08-06 14:24:52,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096579894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:52,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249877517] [2021-08-06 14:24:52,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:52,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:52,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:52,013 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:52,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 14:24:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:53,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:24:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:53,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:53,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:53,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249877517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:53,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:53,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:24:53,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147886594] [2021-08-06 14:24:53,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:53,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:53,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:53,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:53,464 INFO L87 Difference]: Start difference. First operand 117 states and 295 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:53,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:53,946 INFO L93 Difference]: Finished difference Result 211 states and 464 transitions. [2021-08-06 14:24:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:24:53,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:53,947 INFO L225 Difference]: With dead ends: 211 [2021-08-06 14:24:53,947 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 14:24:53,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:24:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 14:24:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 118. [2021-08-06 14:24:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.58974358974359) internal successors, (303), 117 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 303 transitions. [2021-08-06 14:24:53,950 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 303 transitions. Word has length 15 [2021-08-06 14:24:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:53,950 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 303 transitions. [2021-08-06 14:24:53,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 303 transitions. [2021-08-06 14:24:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:53,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:53,950 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:53,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:54,164 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,SelfDestructingSolverStorable68 [2021-08-06 14:24:54,165 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2088204271, now seen corresponding path program 56 times [2021-08-06 14:24:54,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:54,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326990047] [2021-08-06 14:24:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:54,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:54,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:54,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326990047] [2021-08-06 14:24:54,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326990047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:54,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387024494] [2021-08-06 14:24:54,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:54,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:54,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:54,323 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:54,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 14:24:55,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:55,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:55,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:24:55,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:55,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:55,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:24:55,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:24:55,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:24:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:55,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387024494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:55,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:55,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:24:55,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940261999] [2021-08-06 14:24:55,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:55,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:55,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:55,769 INFO L87 Difference]: Start difference. First operand 118 states and 303 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:56,174 INFO L93 Difference]: Finished difference Result 193 states and 442 transitions. [2021-08-06 14:24:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:24:56,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:56,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:56,175 INFO L225 Difference]: With dead ends: 193 [2021-08-06 14:24:56,175 INFO L226 Difference]: Without dead ends: 193 [2021-08-06 14:24:56,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 366.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:24:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-06 14:24:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 118. [2021-08-06 14:24:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.572649572649573) internal successors, (301), 117 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 301 transitions. [2021-08-06 14:24:56,178 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 301 transitions. Word has length 15 [2021-08-06 14:24:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:56,178 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 301 transitions. [2021-08-06 14:24:56,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 301 transitions. [2021-08-06 14:24:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:56,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:56,178 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:56,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:56,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:56,384 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash 496149717, now seen corresponding path program 57 times [2021-08-06 14:24:56,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:56,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62901926] [2021-08-06 14:24:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:56,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:56,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:56,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62901926] [2021-08-06 14:24:56,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62901926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:56,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337135138] [2021-08-06 14:24:56,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:56,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:56,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:56,490 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:56,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 14:24:57,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:24:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:57,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:24:57,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:57,873 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:57,873 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 41 treesize of output 38 [2021-08-06 14:24:57,877 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:57,878 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 34 treesize of output 29 [2021-08-06 14:24:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337135138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:57,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:57,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:24:57,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192331253] [2021-08-06 14:24:57,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:57,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:57,915 INFO L87 Difference]: Start difference. First operand 118 states and 301 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:58,175 INFO L93 Difference]: Finished difference Result 180 states and 431 transitions. [2021-08-06 14:24:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:24:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:58,176 INFO L225 Difference]: With dead ends: 180 [2021-08-06 14:24:58,176 INFO L226 Difference]: Without dead ends: 180 [2021-08-06 14:24:58,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:24:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-06 14:24:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 120. [2021-08-06 14:24:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.5714285714285716) internal successors, (306), 119 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 306 transitions. [2021-08-06 14:24:58,178 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 306 transitions. Word has length 15 [2021-08-06 14:24:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:58,178 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 306 transitions. [2021-08-06 14:24:58,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:58,178 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 306 transitions. [2021-08-06 14:24:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:58,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:58,179 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:58,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:58,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:58,389 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:24:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash -993255279, now seen corresponding path program 58 times [2021-08-06 14:24:58,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:58,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474249736] [2021-08-06 14:24:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:58,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:58,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:58,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474249736] [2021-08-06 14:24:58,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474249736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:58,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567670965] [2021-08-06 14:24:58,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:58,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:58,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:58,497 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:58,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 14:24:59,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:24:59,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:59,896 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:59,897 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 41 treesize of output 38 [2021-08-06 14:24:59,902 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:59,902 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 34 treesize of output 29 [2021-08-06 14:24:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:59,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567670965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:59,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:59,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:24:59,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372610722] [2021-08-06 14:24:59,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:24:59,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:24:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:59,939 INFO L87 Difference]: Start difference. First operand 120 states and 306 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:00,025 INFO L93 Difference]: Finished difference Result 163 states and 401 transitions. [2021-08-06 14:25:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:25:00,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:00,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:00,026 INFO L225 Difference]: With dead ends: 163 [2021-08-06 14:25:00,026 INFO L226 Difference]: Without dead ends: 163 [2021-08-06 14:25:00,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-06 14:25:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-08-06 14:25:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.5714285714285716) internal successors, (306), 119 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 306 transitions. [2021-08-06 14:25:00,028 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 306 transitions. Word has length 15 [2021-08-06 14:25:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:00,028 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 306 transitions. [2021-08-06 14:25:00,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 306 transitions. [2021-08-06 14:25:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:00,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:00,028 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:00,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:00,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:00,250 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:00,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1505045545, now seen corresponding path program 59 times [2021-08-06 14:25:00,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:00,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284749110] [2021-08-06 14:25:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:00,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:00,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:00,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284749110] [2021-08-06 14:25:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284749110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37101982] [2021-08-06 14:25:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:00,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:00,343 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:00,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 14:25:01,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:25:01,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:01,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:01,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:01,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:01,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:25:01,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:01,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:25:01,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:01,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:25:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:01,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37101982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:01,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:01,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:01,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58793132] [2021-08-06 14:25:01,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:01,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:01,846 INFO L87 Difference]: Start difference. First operand 120 states and 306 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:02,047 INFO L93 Difference]: Finished difference Result 199 states and 466 transitions. [2021-08-06 14:25:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:25:02,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:02,048 INFO L225 Difference]: With dead ends: 199 [2021-08-06 14:25:02,048 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 14:25:02,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 14:25:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 135. [2021-08-06 14:25:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.701492537313433) internal successors, (362), 134 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 362 transitions. [2021-08-06 14:25:02,051 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 362 transitions. Word has length 15 [2021-08-06 14:25:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:02,052 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 362 transitions. [2021-08-06 14:25:02,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 362 transitions. [2021-08-06 14:25:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:02,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:02,052 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:02,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:02,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:02,253 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1870221043, now seen corresponding path program 60 times [2021-08-06 14:25:02,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:02,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575442852] [2021-08-06 14:25:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:02,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:02,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:02,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575442852] [2021-08-06 14:25:02,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575442852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:02,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031528459] [2021-08-06 14:25:02,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:02,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:02,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:02,361 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:02,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 14:25:03,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:25:03,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:03,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:03,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:25:03,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:03,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:03,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031528459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:03,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:03,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:03,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678622127] [2021-08-06 14:25:03,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:03,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:03,891 INFO L87 Difference]: Start difference. First operand 135 states and 362 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:04,154 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2021-08-06 14:25:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:25:04,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:04,155 INFO L225 Difference]: With dead ends: 182 [2021-08-06 14:25:04,155 INFO L226 Difference]: Without dead ends: 178 [2021-08-06 14:25:04,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:25:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-06 14:25:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2021-08-06 14:25:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.6814814814814816) internal successors, (362), 135 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 362 transitions. [2021-08-06 14:25:04,157 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 362 transitions. Word has length 15 [2021-08-06 14:25:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:04,157 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 362 transitions. [2021-08-06 14:25:04,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 362 transitions. [2021-08-06 14:25:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:04,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:04,158 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:04,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:04,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:04,379 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1497315147, now seen corresponding path program 61 times [2021-08-06 14:25:04,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:04,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67526346] [2021-08-06 14:25:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:04,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:04,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:04,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67526346] [2021-08-06 14:25:04,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67526346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:04,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674659565] [2021-08-06 14:25:04,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:04,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:04,510 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:04,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 14:25:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:05,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:05,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:05,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:05,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:05,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:05,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:06,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674659565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:06,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:06,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:06,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424058984] [2021-08-06 14:25:06,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:06,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:06,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:06,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:06,092 INFO L87 Difference]: Start difference. First operand 136 states and 362 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:06,399 INFO L93 Difference]: Finished difference Result 222 states and 495 transitions. [2021-08-06 14:25:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:25:06,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:06,401 INFO L225 Difference]: With dead ends: 222 [2021-08-06 14:25:06,401 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 14:25:06,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:25:06,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 14:25:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 138. [2021-08-06 14:25:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.7007299270072993) internal successors, (370), 137 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) [2021-08-06 14:25:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 370 transitions. [2021-08-06 14:25:06,404 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 370 transitions. Word has length 15 [2021-08-06 14:25:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:06,404 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 370 transitions. [2021-08-06 14:25:06,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 370 transitions. [2021-08-06 14:25:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:06,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:06,405 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:06,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 14:25:06,612 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,SelfDestructingSolverStorable74 [2021-08-06 14:25:06,613 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash -695698919, now seen corresponding path program 62 times [2021-08-06 14:25:06,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:06,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080752611] [2021-08-06 14:25:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:06,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:06,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:06,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080752611] [2021-08-06 14:25:06,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080752611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:06,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539541572] [2021-08-06 14:25:06,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:06,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:06,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:06,733 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:06,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 14:25:08,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:08,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:08,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:08,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:08,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:08,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:08,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539541572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:08,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:08,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:08,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095480587] [2021-08-06 14:25:08,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:08,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:08,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:08,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:08,257 INFO L87 Difference]: Start difference. First operand 138 states and 370 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:08,651 INFO L93 Difference]: Finished difference Result 219 states and 493 transitions. [2021-08-06 14:25:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:25:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:08,652 INFO L225 Difference]: With dead ends: 219 [2021-08-06 14:25:08,652 INFO L226 Difference]: Without dead ends: 215 [2021-08-06 14:25:08,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:25:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-06 14:25:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 140. [2021-08-06 14:25:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.697841726618705) internal successors, (375), 139 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 375 transitions. [2021-08-06 14:25:08,654 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 375 transitions. Word has length 15 [2021-08-06 14:25:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:08,655 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 375 transitions. [2021-08-06 14:25:08,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 375 transitions. [2021-08-06 14:25:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:08,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:08,655 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:08,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:08,860 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,SelfDestructingSolverStorable75 [2021-08-06 14:25:08,861 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1022644787, now seen corresponding path program 63 times [2021-08-06 14:25:08,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:08,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606260173] [2021-08-06 14:25:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:08,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:08,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:08,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606260173] [2021-08-06 14:25:08,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606260173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:08,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864534168] [2021-08-06 14:25:08,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:08,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:08,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:08,985 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:08,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 14:25:10,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:25:10,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:10,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:10,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:10,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:10,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:10,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:10,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:10,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864534168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:10,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:10,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:10,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001205051] [2021-08-06 14:25:10,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:10,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:10,484 INFO L87 Difference]: Start difference. First operand 140 states and 375 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:10,781 INFO L93 Difference]: Finished difference Result 205 states and 477 transitions. [2021-08-06 14:25:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:25:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:10,782 INFO L225 Difference]: With dead ends: 205 [2021-08-06 14:25:10,782 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 14:25:10,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:25:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 14:25:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 138. [2021-08-06 14:25:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.664233576642336) internal successors, (365), 137 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:10,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 365 transitions. [2021-08-06 14:25:10,784 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 365 transitions. Word has length 15 [2021-08-06 14:25:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 365 transitions. [2021-08-06 14:25:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 365 transitions. [2021-08-06 14:25:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:10,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:10,785 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:10,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:10,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-06 14:25:10,993 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:10,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:10,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1379198957, now seen corresponding path program 64 times [2021-08-06 14:25:10,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:10,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771135170] [2021-08-06 14:25:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:10,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:11,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:11,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771135170] [2021-08-06 14:25:11,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771135170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:11,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441970615] [2021-08-06 14:25:11,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:11,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:11,082 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:11,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 14:25:12,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:12,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:12,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:12,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:12,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441970615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:12,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:12,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:12,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625522262] [2021-08-06 14:25:12,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:12,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:12,614 INFO L87 Difference]: Start difference. First operand 138 states and 365 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:13,123 INFO L93 Difference]: Finished difference Result 211 states and 481 transitions. [2021-08-06 14:25:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:25:13,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:13,124 INFO L225 Difference]: With dead ends: 211 [2021-08-06 14:25:13,124 INFO L226 Difference]: Without dead ends: 207 [2021-08-06 14:25:13,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:25:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-06 14:25:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 144. [2021-08-06 14:25:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6573426573426575) internal successors, (380), 143 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 380 transitions. [2021-08-06 14:25:13,127 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 380 transitions. Word has length 15 [2021-08-06 14:25:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:13,127 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 380 transitions. [2021-08-06 14:25:13,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 380 transitions. [2021-08-06 14:25:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:13,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:13,127 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:13,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:13,336 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,SelfDestructingSolverStorable77 [2021-08-06 14:25:13,337 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:13,337 INFO L82 PathProgramCache]: Analyzing trace with hash 349848377, now seen corresponding path program 65 times [2021-08-06 14:25:13,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:13,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28284723] [2021-08-06 14:25:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:13,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:13,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28284723] [2021-08-06 14:25:13,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28284723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705692395] [2021-08-06 14:25:13,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:13,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:13,425 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:13,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 14:25:14,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:14,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:14,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:14,958 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:14,958 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 43 treesize of output 40 [2021-08-06 14:25:14,963 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:14,964 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 34 [2021-08-06 14:25:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:15,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705692395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:15,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:15,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:15,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792006438] [2021-08-06 14:25:15,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:15,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:15,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:15,029 INFO L87 Difference]: Start difference. First operand 144 states and 380 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:15,424 INFO L93 Difference]: Finished difference Result 180 states and 432 transitions. [2021-08-06 14:25:15,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:25:15,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:15,425 INFO L225 Difference]: With dead ends: 180 [2021-08-06 14:25:15,425 INFO L226 Difference]: Without dead ends: 172 [2021-08-06 14:25:15,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 327.1ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:25:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-06 14:25:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 146. [2021-08-06 14:25:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.627586206896552) internal successors, (381), 145 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 381 transitions. [2021-08-06 14:25:15,428 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 381 transitions. Word has length 15 [2021-08-06 14:25:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:15,428 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 381 transitions. [2021-08-06 14:25:15,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 381 transitions. [2021-08-06 14:25:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:15,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:15,429 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:15,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 14:25:15,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:15,637 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2117593779, now seen corresponding path program 66 times [2021-08-06 14:25:15,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:15,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027365958] [2021-08-06 14:25:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:15,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:15,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:15,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027365958] [2021-08-06 14:25:15,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027365958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:15,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582965137] [2021-08-06 14:25:15,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:15,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:15,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:15,738 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:15,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 14:25:17,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:25:17,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:17,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:17,260 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:17,260 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 41 treesize of output 38 [2021-08-06 14:25:17,265 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:17,265 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 34 treesize of output 29 [2021-08-06 14:25:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:17,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582965137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:17,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:17,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:17,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439191849] [2021-08-06 14:25:17,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:17,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:17,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:17,303 INFO L87 Difference]: Start difference. First operand 146 states and 381 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,491 INFO L93 Difference]: Finished difference Result 224 states and 523 transitions. [2021-08-06 14:25:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,493 INFO L225 Difference]: With dead ends: 224 [2021-08-06 14:25:17,493 INFO L226 Difference]: Without dead ends: 224 [2021-08-06 14:25:17,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-06 14:25:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 150. [2021-08-06 14:25:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.6442953020134228) internal successors, (394), 149 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 394 transitions. [2021-08-06 14:25:17,495 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 394 transitions. Word has length 15 [2021-08-06 14:25:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,495 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 394 transitions. [2021-08-06 14:25:17,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 394 transitions. [2021-08-06 14:25:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:17,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,496 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:17,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:17,702 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1913634763, now seen corresponding path program 67 times [2021-08-06 14:25:17,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922931545] [2021-08-06 14:25:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:17,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922931545] [2021-08-06 14:25:17,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922931545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:17,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307193767] [2021-08-06 14:25:17,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:17,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:17,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:17,817 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:17,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 14:25:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:19,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:19,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:19,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:19,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307193767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:19,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:19,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:19,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509661583] [2021-08-06 14:25:19,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:19,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:19,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:19,428 INFO L87 Difference]: Start difference. First operand 150 states and 394 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:19,641 INFO L93 Difference]: Finished difference Result 223 states and 518 transitions. [2021-08-06 14:25:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:25:19,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:19,642 INFO L225 Difference]: With dead ends: 223 [2021-08-06 14:25:19,643 INFO L226 Difference]: Without dead ends: 223 [2021-08-06 14:25:19,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-06 14:25:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 157. [2021-08-06 14:25:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.6923076923076925) internal successors, (420), 156 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 420 transitions. [2021-08-06 14:25:19,645 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 420 transitions. Word has length 15 [2021-08-06 14:25:19,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:19,645 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 420 transitions. [2021-08-06 14:25:19,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 420 transitions. [2021-08-06 14:25:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:19,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:19,646 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:19,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 14:25:19,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:19,853 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1112018535, now seen corresponding path program 68 times [2021-08-06 14:25:19,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:19,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745808807] [2021-08-06 14:25:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:19,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:19,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:19,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745808807] [2021-08-06 14:25:19,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745808807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:19,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282941586] [2021-08-06 14:25:19,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:19,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:19,958 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:19,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 14:25:21,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:21,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:21,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:21,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:21,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:21,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282941586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:21,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:21,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:21,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339482384] [2021-08-06 14:25:21,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:21,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:21,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:21,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:21,560 INFO L87 Difference]: Start difference. First operand 157 states and 420 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:22,050 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2021-08-06 14:25:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:25:22,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:22,051 INFO L225 Difference]: With dead ends: 222 [2021-08-06 14:25:22,051 INFO L226 Difference]: Without dead ends: 215 [2021-08-06 14:25:22,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:25:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-06 14:25:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 160. [2021-08-06 14:25:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.691823899371069) internal successors, (428), 159 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 428 transitions. [2021-08-06 14:25:22,055 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 428 transitions. Word has length 15 [2021-08-06 14:25:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:22,055 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 428 transitions. [2021-08-06 14:25:22,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:22,055 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 428 transitions. [2021-08-06 14:25:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:22,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:22,056 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:22,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:22,268 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,SelfDestructingSolverStorable81 [2021-08-06 14:25:22,269 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 606325171, now seen corresponding path program 69 times [2021-08-06 14:25:22,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:22,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517466850] [2021-08-06 14:25:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:22,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:22,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:22,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517466850] [2021-08-06 14:25:22,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517466850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:22,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661123105] [2021-08-06 14:25:22,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:22,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:22,365 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:22,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 14:25:23,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:25:23,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:23,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:23,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:23,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:23,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:23,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:23,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:23,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661123105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:23,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:23,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:23,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864319394] [2021-08-06 14:25:23,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:23,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:23,953 INFO L87 Difference]: Start difference. First operand 160 states and 428 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:24,295 INFO L93 Difference]: Finished difference Result 209 states and 506 transitions. [2021-08-06 14:25:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:25:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:24,296 INFO L225 Difference]: With dead ends: 209 [2021-08-06 14:25:24,296 INFO L226 Difference]: Without dead ends: 209 [2021-08-06 14:25:24,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:25:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-06 14:25:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 155. [2021-08-06 14:25:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.642857142857143) internal successors, (407), 154 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 407 transitions. [2021-08-06 14:25:24,299 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 407 transitions. Word has length 15 [2021-08-06 14:25:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:24,299 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 407 transitions. [2021-08-06 14:25:24,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 407 transitions. [2021-08-06 14:25:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:24,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:24,299 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:24,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 14:25:24,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:24,508 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:24,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1104288137, now seen corresponding path program 70 times [2021-08-06 14:25:24,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:24,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329045688] [2021-08-06 14:25:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:24,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:24,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:24,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329045688] [2021-08-06 14:25:24,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329045688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:24,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198174918] [2021-08-06 14:25:24,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:24,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:24,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:24,607 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:24,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 14:25:25,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:26,166 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:26,166 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 41 treesize of output 38 [2021-08-06 14:25:26,171 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:26,171 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 34 treesize of output 29 [2021-08-06 14:25:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:26,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198174918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:26,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:26,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:26,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757248319] [2021-08-06 14:25:26,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:26,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:26,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:26,223 INFO L87 Difference]: Start difference. First operand 155 states and 407 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:26,427 INFO L93 Difference]: Finished difference Result 192 states and 482 transitions. [2021-08-06 14:25:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:25:26,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:26,428 INFO L225 Difference]: With dead ends: 192 [2021-08-06 14:25:26,428 INFO L226 Difference]: Without dead ends: 192 [2021-08-06 14:25:26,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:25:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-06 14:25:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 155. [2021-08-06 14:25:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.642857142857143) internal successors, (407), 154 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 407 transitions. [2021-08-06 14:25:26,448 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 407 transitions. Word has length 15 [2021-08-06 14:25:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:26,448 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 407 transitions. [2021-08-06 14:25:26,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 407 transitions. [2021-08-06 14:25:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:26,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:26,449 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:26,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:26,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:26,665 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:26,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1701274163, now seen corresponding path program 71 times [2021-08-06 14:25:26,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:26,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876542380] [2021-08-06 14:25:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:26,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:26,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:26,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876542380] [2021-08-06 14:25:26,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876542380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:26,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814201675] [2021-08-06 14:25:26,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:26,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:26,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:26,763 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:26,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 14:25:28,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:25:28,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:28,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:28,369 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:28,369 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 41 treesize of output 38 [2021-08-06 14:25:28,374 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:28,374 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 34 treesize of output 29 [2021-08-06 14:25:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:28,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814201675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:28,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:28,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:28,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258435009] [2021-08-06 14:25:28,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:28,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:28,412 INFO L87 Difference]: Start difference. First operand 155 states and 407 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:28,531 INFO L93 Difference]: Finished difference Result 183 states and 464 transitions. [2021-08-06 14:25:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:25:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:28,532 INFO L225 Difference]: With dead ends: 183 [2021-08-06 14:25:28,532 INFO L226 Difference]: Without dead ends: 183 [2021-08-06 14:25:28,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-06 14:25:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 156. [2021-08-06 14:25:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6451612903225805) internal successors, (410), 155 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 410 transitions. [2021-08-06 14:25:28,534 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 410 transitions. Word has length 15 [2021-08-06 14:25:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:28,534 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 410 transitions. [2021-08-06 14:25:28,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 410 transitions. [2021-08-06 14:25:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:28,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:28,535 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:28,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 14:25:28,744 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,SelfDestructingSolverStorable84 [2021-08-06 14:25:28,745 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 202352403, now seen corresponding path program 72 times [2021-08-06 14:25:28,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:28,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731233790] [2021-08-06 14:25:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:28,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:28,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:28,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731233790] [2021-08-06 14:25:28,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731233790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:28,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959098324] [2021-08-06 14:25:28,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:28,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:28,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:28,847 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:28,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 14:25:30,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:25:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:30,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:30,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:25:30,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:30,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:25:30,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:30,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:25:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:30,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959098324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:30,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:30,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:30,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855627403] [2021-08-06 14:25:30,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:30,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:30,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:30,597 INFO L87 Difference]: Start difference. First operand 156 states and 410 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:30,741 INFO L93 Difference]: Finished difference Result 233 states and 554 transitions. [2021-08-06 14:25:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 15 [2021-08-06 14:25:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:30,743 INFO L225 Difference]: With dead ends: 233 [2021-08-06 14:25:30,743 INFO L226 Difference]: Without dead ends: 233 [2021-08-06 14:25:30,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-06 14:25:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 172. [2021-08-06 14:25:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.7017543859649122) internal successors, (462), 171 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 462 transitions. [2021-08-06 14:25:30,746 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 462 transitions. Word has length 15 [2021-08-06 14:25:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:30,746 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 462 transitions. [2021-08-06 14:25:30,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 462 transitions. [2021-08-06 14:25:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:30,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:30,747 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:30,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 14:25:30,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:30,965 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:30,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1756401527, now seen corresponding path program 73 times [2021-08-06 14:25:30,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:30,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581834828] [2021-08-06 14:25:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:30,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:31,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:31,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581834828] [2021-08-06 14:25:31,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581834828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:31,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336840167] [2021-08-06 14:25:31,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:31,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:31,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:31,069 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:31,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 14:25:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:32,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:32,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:25:32,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:32,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336840167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:32,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:32,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:32,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851882244] [2021-08-06 14:25:32,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:32,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:32,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:32,793 INFO L87 Difference]: Start difference. First operand 172 states and 462 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:33,079 INFO L93 Difference]: Finished difference Result 218 states and 522 transitions. [2021-08-06 14:25:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:25:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:33,080 INFO L225 Difference]: With dead ends: 218 [2021-08-06 14:25:33,080 INFO L226 Difference]: Without dead ends: 215 [2021-08-06 14:25:33,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:25:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-06 14:25:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 176. [2021-08-06 14:25:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.662857142857143) internal successors, (466), 175 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 466 transitions. [2021-08-06 14:25:33,083 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 466 transitions. Word has length 15 [2021-08-06 14:25:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:33,083 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 466 transitions. [2021-08-06 14:25:33,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 466 transitions. [2021-08-06 14:25:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:33,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:33,083 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:33,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 14:25:33,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:33,293 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 441994741, now seen corresponding path program 74 times [2021-08-06 14:25:33,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:33,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173317168] [2021-08-06 14:25:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:33,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:33,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:33,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173317168] [2021-08-06 14:25:33,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173317168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:33,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429864385] [2021-08-06 14:25:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:33,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:33,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:33,392 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:33,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 14:25:34,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:34,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:34,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:34,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:34,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:25:34,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:34,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:25:34,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:25:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:35,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429864385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:35,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:35,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:35,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307887512] [2021-08-06 14:25:35,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:35,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:35,013 INFO L87 Difference]: Start difference. First operand 176 states and 466 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:35,447 INFO L93 Difference]: Finished difference Result 249 states and 585 transitions. [2021-08-06 14:25:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:25:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 15 [2021-08-06 14:25:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:35,448 INFO L225 Difference]: With dead ends: 249 [2021-08-06 14:25:35,448 INFO L226 Difference]: Without dead ends: 249 [2021-08-06 14:25:35,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:25:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-06 14:25:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 174. [2021-08-06 14:25:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.6820809248554913) internal successors, (464), 173 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 464 transitions. [2021-08-06 14:25:35,451 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 464 transitions. Word has length 15 [2021-08-06 14:25:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:35,451 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 464 transitions. [2021-08-06 14:25:35,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 464 transitions. [2021-08-06 14:25:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:35,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:35,452 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:35,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:35,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:35,659 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash -477705967, now seen corresponding path program 75 times [2021-08-06 14:25:35,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:35,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352556648] [2021-08-06 14:25:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:35,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:35,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:35,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352556648] [2021-08-06 14:25:35,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352556648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:35,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518000251] [2021-08-06 14:25:35,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:35,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:35,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:35,777 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:35,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 14:25:37,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:25:37,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:37,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:37,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:25:37,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:37,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:37,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518000251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:37,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:37,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:37,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563553230] [2021-08-06 14:25:37,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:37,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:37,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:37,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:37,559 INFO L87 Difference]: Start difference. First operand 174 states and 464 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:37,953 INFO L93 Difference]: Finished difference Result 219 states and 529 transitions. [2021-08-06 14:25:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:25:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:37,954 INFO L225 Difference]: With dead ends: 219 [2021-08-06 14:25:37,954 INFO L226 Difference]: Without dead ends: 215 [2021-08-06 14:25:37,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:25:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-06 14:25:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 175. [2021-08-06 14:25:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.6724137931034484) internal successors, (465), 174 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 465 transitions. [2021-08-06 14:25:37,961 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 465 transitions. Word has length 15 [2021-08-06 14:25:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:37,961 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 465 transitions. [2021-08-06 14:25:37,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 465 transitions. [2021-08-06 14:25:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:37,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:37,963 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:37,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:38,176 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,SelfDestructingSolverStorable88 [2021-08-06 14:25:38,177 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash 449725139, now seen corresponding path program 76 times [2021-08-06 14:25:38,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:38,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993663203] [2021-08-06 14:25:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:38,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:38,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:38,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993663203] [2021-08-06 14:25:38,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993663203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:38,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224653799] [2021-08-06 14:25:38,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:38,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:38,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:38,327 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:38,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 14:25:39,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:39,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:39,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:39,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:39,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:39,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:40,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224653799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:40,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:40,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:40,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320998774] [2021-08-06 14:25:40,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:40,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:40,100 INFO L87 Difference]: Start difference. First operand 175 states and 465 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:40,377 INFO L93 Difference]: Finished difference Result 262 states and 584 transitions. [2021-08-06 14:25:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:25:40,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 15 [2021-08-06 14:25:40,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:40,378 INFO L225 Difference]: With dead ends: 262 [2021-08-06 14:25:40,378 INFO L226 Difference]: Without dead ends: 261 [2021-08-06 14:25:40,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:25:40,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-06 14:25:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 171. [2021-08-06 14:25:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.6588235294117646) internal successors, (452), 170 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 452 transitions. [2021-08-06 14:25:40,381 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 452 transitions. Word has length 15 [2021-08-06 14:25:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:40,381 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 452 transitions. [2021-08-06 14:25:40,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 452 transitions. [2021-08-06 14:25:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:40,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:40,382 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:40,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 14:25:40,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 14:25:40,597 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1251341367, now seen corresponding path program 77 times [2021-08-06 14:25:40,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:40,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318752311] [2021-08-06 14:25:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:40,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:40,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:40,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318752311] [2021-08-06 14:25:40,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318752311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:40,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880525188] [2021-08-06 14:25:40,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:40,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:40,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:40,741 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 14:25:42,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:25:42,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:42,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:42,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:42,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:42,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:42,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880525188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:42,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:42,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:42,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998507941] [2021-08-06 14:25:42,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:42,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:42,610 INFO L87 Difference]: Start difference. First operand 171 states and 452 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:43,013 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-08-06 14:25:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:25:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:43,014 INFO L225 Difference]: With dead ends: 234 [2021-08-06 14:25:43,014 INFO L226 Difference]: Without dead ends: 230 [2021-08-06 14:25:43,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:25:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-08-06 14:25:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 174. [2021-08-06 14:25:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.6647398843930636) internal successors, (461), 173 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 461 transitions. [2021-08-06 14:25:43,018 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 461 transitions. Word has length 15 [2021-08-06 14:25:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:43,018 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 461 transitions. [2021-08-06 14:25:43,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 461 transitions. [2021-08-06 14:25:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:43,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:43,018 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:43,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 14:25:43,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:43,229 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1325282223, now seen corresponding path program 78 times [2021-08-06 14:25:43,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:43,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123046221] [2021-08-06 14:25:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:43,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:43,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:43,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123046221] [2021-08-06 14:25:43,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123046221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:43,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262087819] [2021-08-06 14:25:43,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:43,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:43,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:43,346 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:43,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 14:25:44,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:25:44,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:44,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:44,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:45,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:45,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:45,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262087819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:45,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:45,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:45,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619049925] [2021-08-06 14:25:45,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:45,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:45,129 INFO L87 Difference]: Start difference. First operand 174 states and 461 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:45,353 INFO L93 Difference]: Finished difference Result 225 states and 536 transitions. [2021-08-06 14:25:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:45,354 INFO L225 Difference]: With dead ends: 225 [2021-08-06 14:25:45,354 INFO L226 Difference]: Without dead ends: 225 [2021-08-06 14:25:45,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:25:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-06 14:25:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 171. [2021-08-06 14:25:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.6411764705882352) internal successors, (449), 170 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 449 transitions. [2021-08-06 14:25:45,357 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 449 transitions. Word has length 15 [2021-08-06 14:25:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:45,357 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 449 transitions. [2021-08-06 14:25:45,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 449 transitions. [2021-08-06 14:25:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:45,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:45,358 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:45,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 14:25:45,581 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,SelfDestructingSolverStorable91 [2021-08-06 14:25:45,581 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1164635591, now seen corresponding path program 79 times [2021-08-06 14:25:45,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:45,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843301853] [2021-08-06 14:25:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:45,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:45,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:45,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843301853] [2021-08-06 14:25:45,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843301853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:45,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617716877] [2021-08-06 14:25:45,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:45,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:45,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:45,661 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:45,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 14:25:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:47,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:47,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:47,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:47,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:47,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617716877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:47,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:47,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:25:47,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91733766] [2021-08-06 14:25:47,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:47,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:47,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:47,452 INFO L87 Difference]: Start difference. First operand 171 states and 449 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:47,645 INFO L93 Difference]: Finished difference Result 183 states and 467 transitions. [2021-08-06 14:25:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:25:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:47,646 INFO L225 Difference]: With dead ends: 183 [2021-08-06 14:25:47,646 INFO L226 Difference]: Without dead ends: 179 [2021-08-06 14:25:47,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:25:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-06 14:25:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171. [2021-08-06 14:25:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.6294117647058823) internal successors, (447), 170 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 447 transitions. [2021-08-06 14:25:47,648 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 447 transitions. Word has length 15 [2021-08-06 14:25:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:47,648 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 447 transitions. [2021-08-06 14:25:47,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 447 transitions. [2021-08-06 14:25:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:47,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:47,649 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:47,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 14:25:47,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:47,870 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash 33405523, now seen corresponding path program 80 times [2021-08-06 14:25:47,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:47,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368330456] [2021-08-06 14:25:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:47,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:48,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:48,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368330456] [2021-08-06 14:25:48,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368330456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:48,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221609671] [2021-08-06 14:25:48,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:48,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:48,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:48,010 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:48,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 14:25:49,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:49,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:49,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:49,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:49,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:49,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221609671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:49,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:49,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:25:49,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611537559] [2021-08-06 14:25:49,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:49,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:49,874 INFO L87 Difference]: Start difference. First operand 171 states and 447 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:50,088 INFO L93 Difference]: Finished difference Result 255 states and 592 transitions. [2021-08-06 14:25:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:50,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 15 [2021-08-06 14:25:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:50,089 INFO L225 Difference]: With dead ends: 255 [2021-08-06 14:25:50,089 INFO L226 Difference]: Without dead ends: 255 [2021-08-06 14:25:50,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-06 14:25:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 180. [2021-08-06 14:25:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.6815642458100557) internal successors, (480), 179 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 480 transitions. [2021-08-06 14:25:50,092 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 480 transitions. Word has length 15 [2021-08-06 14:25:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:50,092 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 480 transitions. [2021-08-06 14:25:50,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 480 transitions. [2021-08-06 14:25:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:50,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:50,093 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:50,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:50,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:50,301 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash 835021751, now seen corresponding path program 81 times [2021-08-06 14:25:50,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:50,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547468982] [2021-08-06 14:25:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:50,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:50,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:50,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547468982] [2021-08-06 14:25:50,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547468982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:50,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969664620] [2021-08-06 14:25:50,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:50,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:50,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:50,399 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:50,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 14:25:52,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:25:52,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:52,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:52,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:52,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:52,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:52,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:52,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969664620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:52,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:52,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:25:52,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492723260] [2021-08-06 14:25:52,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:52,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:52,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:52,309 INFO L87 Difference]: Start difference. First operand 180 states and 480 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:52,652 INFO L93 Difference]: Finished difference Result 247 states and 577 transitions. [2021-08-06 14:25:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:25:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:52,653 INFO L225 Difference]: With dead ends: 247 [2021-08-06 14:25:52,653 INFO L226 Difference]: Without dead ends: 241 [2021-08-06 14:25:52,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:25:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-06 14:25:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 182. [2021-08-06 14:25:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.6740331491712706) internal successors, (484), 181 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 484 transitions. [2021-08-06 14:25:52,656 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 484 transitions. Word has length 15 [2021-08-06 14:25:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:52,656 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 484 transitions. [2021-08-06 14:25:52,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 484 transitions. [2021-08-06 14:25:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:52,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:52,656 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:52,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:52,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:52,865 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:52,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1741601839, now seen corresponding path program 82 times [2021-08-06 14:25:52,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:52,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681348924] [2021-08-06 14:25:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:52,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:52,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:52,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681348924] [2021-08-06 14:25:52,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681348924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:52,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8000181] [2021-08-06 14:25:52,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:52,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:52,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:52,967 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:52,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 14:25:54,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:54,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:54,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:54,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:54,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:54,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8000181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:54,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:54,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:25:54,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679712055] [2021-08-06 14:25:54,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:54,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:54,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:54,861 INFO L87 Difference]: Start difference. First operand 182 states and 484 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:55,063 INFO L93 Difference]: Finished difference Result 233 states and 560 transitions. [2021-08-06 14:25:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:25:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:55,064 INFO L225 Difference]: With dead ends: 233 [2021-08-06 14:25:55,064 INFO L226 Difference]: Without dead ends: 233 [2021-08-06 14:25:55,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:25:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-06 14:25:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 180. [2021-08-06 14:25:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.653631284916201) internal successors, (475), 179 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 475 transitions. [2021-08-06 14:25:55,067 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 475 transitions. Word has length 15 [2021-08-06 14:25:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:55,067 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 475 transitions. [2021-08-06 14:25:55,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 475 transitions. [2021-08-06 14:25:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:55,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:55,067 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:55,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 14:25:55,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:55,277 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:55,277 INFO L82 PathProgramCache]: Analyzing trace with hash 842752149, now seen corresponding path program 83 times [2021-08-06 14:25:55,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:55,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110149258] [2021-08-06 14:25:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:55,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:55,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:55,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110149258] [2021-08-06 14:25:55,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110149258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:55,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240825435] [2021-08-06 14:25:55,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:55,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:55,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:55,359 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:55,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 14:25:57,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:25:57,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:57,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:57,201 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:57,201 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 41 treesize of output 38 [2021-08-06 14:25:57,206 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:57,206 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 34 treesize of output 29 [2021-08-06 14:25:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:57,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240825435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:57,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:57,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:25:57,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092759412] [2021-08-06 14:25:57,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:57,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:57,241 INFO L87 Difference]: Start difference. First operand 180 states and 475 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:57,381 INFO L93 Difference]: Finished difference Result 241 states and 579 transitions. [2021-08-06 14:25:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:25:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:25:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:57,382 INFO L225 Difference]: With dead ends: 241 [2021-08-06 14:25:57,382 INFO L226 Difference]: Without dead ends: 241 [2021-08-06 14:25:57,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-06 14:25:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 180. [2021-08-06 14:25:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.653631284916201) internal successors, (475), 179 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 475 transitions. [2021-08-06 14:25:57,390 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 475 transitions. Word has length 15 [2021-08-06 14:25:57,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:57,390 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 475 transitions. [2021-08-06 14:25:57,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 475 transitions. [2021-08-06 14:25:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:57,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:57,390 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:57,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:57,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:57,612 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:25:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash 12399315, now seen corresponding path program 84 times [2021-08-06 14:25:57,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:57,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661572977] [2021-08-06 14:25:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:57,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:57,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:57,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661572977] [2021-08-06 14:25:57,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661572977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:57,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516359775] [2021-08-06 14:25:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:57,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:57,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:57,739 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:57,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 14:25:59,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:25:59,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:59,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:25:59,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:59,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:59,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:25:59,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:25:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:59,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516359775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:59,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:59,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:59,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358204199] [2021-08-06 14:25:59,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:59,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:59,619 INFO L87 Difference]: Start difference. First operand 180 states and 475 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:59,874 INFO L93 Difference]: Finished difference Result 278 states and 651 transitions. [2021-08-06 14:25:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 15 [2021-08-06 14:25:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:59,876 INFO L225 Difference]: With dead ends: 278 [2021-08-06 14:25:59,876 INFO L226 Difference]: Without dead ends: 278 [2021-08-06 14:25:59,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:25:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-06 14:25:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 192. [2021-08-06 14:25:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.7068062827225132) internal successors, (517), 191 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 517 transitions. [2021-08-06 14:25:59,879 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 517 transitions. Word has length 15 [2021-08-06 14:25:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:59,879 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 517 transitions. [2021-08-06 14:25:59,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 517 transitions. [2021-08-06 14:25:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:25:59,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:59,879 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:59,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:00,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 14:26:00,089 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash 814015543, now seen corresponding path program 85 times [2021-08-06 14:26:00,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:00,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933889998] [2021-08-06 14:26:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:00,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:00,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:00,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933889998] [2021-08-06 14:26:00,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933889998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:00,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204464193] [2021-08-06 14:26:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:00,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:00,205 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:00,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 14:26:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:01,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:02,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:02,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:26:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:02,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:26:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:02,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204464193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:02,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:02,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:26:02,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603854726] [2021-08-06 14:26:02,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:02,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:02,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:02,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:02,134 INFO L87 Difference]: Start difference. First operand 192 states and 517 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:02,657 INFO L93 Difference]: Finished difference Result 282 states and 667 transitions. [2021-08-06 14:26:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:26:02,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:02,658 INFO L225 Difference]: With dead ends: 282 [2021-08-06 14:26:02,658 INFO L226 Difference]: Without dead ends: 273 [2021-08-06 14:26:02,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:26:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-06 14:26:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 201. [2021-08-06 14:26:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.725) internal successors, (545), 200 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 545 transitions. [2021-08-06 14:26:02,661 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 545 transitions. Word has length 15 [2021-08-06 14:26:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:02,661 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 545 transitions. [2021-08-06 14:26:02,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 545 transitions. [2021-08-06 14:26:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:02,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:02,662 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:02,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:02,868 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,SelfDestructingSolverStorable98 [2021-08-06 14:26:02,869 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1762608047, now seen corresponding path program 86 times [2021-08-06 14:26:02,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:02,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892584107] [2021-08-06 14:26:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:02,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:02,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:02,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892584107] [2021-08-06 14:26:02,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892584107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:02,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734744436] [2021-08-06 14:26:02,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:02,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:02,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:02,969 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:02,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 14:26:04,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:04,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:04,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:04,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:26:04,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:04,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:26:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:04,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734744436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:04,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:04,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:26:04,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752830153] [2021-08-06 14:26:04,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:04,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:04,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:04,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:04,824 INFO L87 Difference]: Start difference. First operand 201 states and 545 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:05,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:05,143 INFO L93 Difference]: Finished difference Result 266 states and 639 transitions. [2021-08-06 14:26:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:26:05,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:05,147 INFO L225 Difference]: With dead ends: 266 [2021-08-06 14:26:05,147 INFO L226 Difference]: Without dead ends: 264 [2021-08-06 14:26:05,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:26:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-06 14:26:05,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 187. [2021-08-06 14:26:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.6451612903225805) internal successors, (492), 186 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 492 transitions. [2021-08-06 14:26:05,157 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 492 transitions. Word has length 15 [2021-08-06 14:26:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:05,157 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 492 transitions. [2021-08-06 14:26:05,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 492 transitions. [2021-08-06 14:26:05,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:05,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:05,159 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:05,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 14:26:05,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 14:26:05,373 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 821745941, now seen corresponding path program 87 times [2021-08-06 14:26:05,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:05,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592971024] [2021-08-06 14:26:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:05,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:05,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:05,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592971024] [2021-08-06 14:26:05,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592971024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:05,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894065369] [2021-08-06 14:26:05,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:05,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:05,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:05,508 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:05,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 14:26:07,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:26:07,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:07,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:07,430 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:07,431 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 41 treesize of output 38 [2021-08-06 14:26:07,435 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:07,435 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 34 treesize of output 29 [2021-08-06 14:26:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:07,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894065369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:07,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:07,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:26:07,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072041619] [2021-08-06 14:26:07,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:07,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:07,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:07,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:07,473 INFO L87 Difference]: Start difference. First operand 187 states and 492 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:07,864 INFO L93 Difference]: Finished difference Result 248 states and 607 transitions. [2021-08-06 14:26:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:26:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:07,865 INFO L225 Difference]: With dead ends: 248 [2021-08-06 14:26:07,865 INFO L226 Difference]: Without dead ends: 248 [2021-08-06 14:26:07,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:26:07,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-06 14:26:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2021-08-06 14:26:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.635869565217391) internal successors, (485), 184 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 485 transitions. [2021-08-06 14:26:07,867 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 485 transitions. Word has length 15 [2021-08-06 14:26:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:07,868 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 485 transitions. [2021-08-06 14:26:07,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 485 transitions. [2021-08-06 14:26:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:07,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:07,868 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:07,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:08,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 14:26:08,077 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash -667659055, now seen corresponding path program 88 times [2021-08-06 14:26:08,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:08,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967010603] [2021-08-06 14:26:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:08,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:08,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:08,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967010603] [2021-08-06 14:26:08,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967010603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:08,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452520334] [2021-08-06 14:26:08,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:08,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:08,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:08,181 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:08,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 14:26:09,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:09,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:10,117 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:10,117 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 41 treesize of output 38 [2021-08-06 14:26:10,122 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:10,122 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 34 treesize of output 29 [2021-08-06 14:26:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:10,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452520334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:10,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:10,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:26:10,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142211748] [2021-08-06 14:26:10,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:10,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:10,167 INFO L87 Difference]: Start difference. First operand 185 states and 485 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:10,306 INFO L93 Difference]: Finished difference Result 216 states and 544 transitions. [2021-08-06 14:26:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:26:10,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:10,307 INFO L225 Difference]: With dead ends: 216 [2021-08-06 14:26:10,307 INFO L226 Difference]: Without dead ends: 216 [2021-08-06 14:26:10,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-06 14:26:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 185. [2021-08-06 14:26:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.635869565217391) internal successors, (485), 184 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 485 transitions. [2021-08-06 14:26:10,309 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 485 transitions. Word has length 15 [2021-08-06 14:26:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:10,310 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 485 transitions. [2021-08-06 14:26:10,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 485 transitions. [2021-08-06 14:26:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:10,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:10,310 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:10,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:10,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:10,510 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:10,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1814621851, now seen corresponding path program 89 times [2021-08-06 14:26:10,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:10,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994406819] [2021-08-06 14:26:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:10,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:10,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:10,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994406819] [2021-08-06 14:26:10,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994406819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:10,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809487675] [2021-08-06 14:26:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:10,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:10,604 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:10,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 14:26:12,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:26:12,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:12,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:12,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:12,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:26:12,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:26:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:26:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:12,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809487675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:12,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:12,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 14:26:12,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844044427] [2021-08-06 14:26:12,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:26:12,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:26:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:26:12,537 INFO L87 Difference]: Start difference. First operand 185 states and 485 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:12,661 INFO L93 Difference]: Finished difference Result 249 states and 628 transitions. [2021-08-06 14:26:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:12,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:12,662 INFO L225 Difference]: With dead ends: 249 [2021-08-06 14:26:12,662 INFO L226 Difference]: Without dead ends: 249 [2021-08-06 14:26:12,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-06 14:26:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 184. [2021-08-06 14:26:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.6448087431693987) internal successors, (484), 183 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 484 transitions. [2021-08-06 14:26:12,665 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 484 transitions. Word has length 15 [2021-08-06 14:26:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:12,665 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 484 transitions. [2021-08-06 14:26:12,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 484 transitions. [2021-08-06 14:26:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:12,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:12,665 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:12,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:12,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 14:26:12,866 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1256099443, now seen corresponding path program 90 times [2021-08-06 14:26:12,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:12,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130171538] [2021-08-06 14:26:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:12,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:12,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:12,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130171538] [2021-08-06 14:26:12,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130171538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:12,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852167305] [2021-08-06 14:26:12,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:12,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:12,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:12,963 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:12,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 14:26:14,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:26:14,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:14,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:14,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:14,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:26:14,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:26:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:14,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852167305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:14,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:14,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 14:26:14,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202515481] [2021-08-06 14:26:14,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:26:14,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:14,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:26:14,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:26:14,914 INFO L87 Difference]: Start difference. First operand 184 states and 484 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:15,137 INFO L93 Difference]: Finished difference Result 246 states and 618 transitions. [2021-08-06 14:26:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:26:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:15,138 INFO L225 Difference]: With dead ends: 246 [2021-08-06 14:26:15,138 INFO L226 Difference]: Without dead ends: 242 [2021-08-06 14:26:15,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:26:15,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-06 14:26:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 184. [2021-08-06 14:26:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.639344262295082) internal successors, (483), 183 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 483 transitions. [2021-08-06 14:26:15,141 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 483 transitions. Word has length 15 [2021-08-06 14:26:15,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:15,141 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 483 transitions. [2021-08-06 14:26:15,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 483 transitions. [2021-08-06 14:26:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:15,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:15,141 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:15,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:15,363 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,SelfDestructingSolverStorable103 [2021-08-06 14:26:15,363 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash 237280121, now seen corresponding path program 91 times [2021-08-06 14:26:15,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:15,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217134616] [2021-08-06 14:26:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:15,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:15,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:15,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217134616] [2021-08-06 14:26:15,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217134616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:15,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417581673] [2021-08-06 14:26:15,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:15,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:15,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:15,486 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:15,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 14:26:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:17,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:17,439 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:17,440 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 41 treesize of output 38 [2021-08-06 14:26:17,444 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:17,445 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 34 treesize of output 29 [2021-08-06 14:26:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:17,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417581673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:17,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:17,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:17,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276108243] [2021-08-06 14:26:17,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:17,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:17,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:17,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:17,480 INFO L87 Difference]: Start difference. First operand 184 states and 483 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:17,611 INFO L93 Difference]: Finished difference Result 250 states and 630 transitions. [2021-08-06 14:26:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:17,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:17,612 INFO L225 Difference]: With dead ends: 250 [2021-08-06 14:26:17,612 INFO L226 Difference]: Without dead ends: 250 [2021-08-06 14:26:17,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-06 14:26:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 185. [2021-08-06 14:26:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.641304347826087) internal successors, (486), 184 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 486 transitions. [2021-08-06 14:26:17,615 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 486 transitions. Word has length 15 [2021-08-06 14:26:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:17,615 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 486 transitions. [2021-08-06 14:26:17,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 486 transitions. [2021-08-06 14:26:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:17,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:17,616 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:17,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:17,828 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,SelfDestructingSolverStorable104 [2021-08-06 14:26:17,829 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1791329245, now seen corresponding path program 92 times [2021-08-06 14:26:17,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:17,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873043486] [2021-08-06 14:26:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:17,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:17,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:17,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873043486] [2021-08-06 14:26:17,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873043486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:17,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568974684] [2021-08-06 14:26:17,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:17,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:17,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:17,931 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:17,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 14:26:19,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:19,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:19,906 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:19,906 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 43 treesize of output 40 [2021-08-06 14:26:19,910 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:19,911 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 34 [2021-08-06 14:26:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:19,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568974684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:19,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:19,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:19,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674349139] [2021-08-06 14:26:19,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:19,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:19,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:19,972 INFO L87 Difference]: Start difference. First operand 185 states and 486 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:20,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:20,249 INFO L93 Difference]: Finished difference Result 248 states and 622 transitions. [2021-08-06 14:26:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:26:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:20,250 INFO L225 Difference]: With dead ends: 248 [2021-08-06 14:26:20,250 INFO L226 Difference]: Without dead ends: 245 [2021-08-06 14:26:20,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:26:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-06 14:26:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 185. [2021-08-06 14:26:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.635869565217391) internal successors, (485), 184 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 485 transitions. [2021-08-06 14:26:20,253 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 485 transitions. Word has length 15 [2021-08-06 14:26:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:20,253 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 485 transitions. [2021-08-06 14:26:20,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 485 transitions. [2021-08-06 14:26:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:20,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:20,253 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:20,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:20,453 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,SelfDestructingSolverStorable105 [2021-08-06 14:26:20,454 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:20,454 INFO L82 PathProgramCache]: Analyzing trace with hash 476922459, now seen corresponding path program 93 times [2021-08-06 14:26:20,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:20,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593055270] [2021-08-06 14:26:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:20,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:20,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:20,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593055270] [2021-08-06 14:26:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593055270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:20,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035208575] [2021-08-06 14:26:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:20,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:20,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:20,597 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:20,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 14:26:22,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:26:22,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:22,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:22,626 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:22,626 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 41 treesize of output 38 [2021-08-06 14:26:22,631 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:22,631 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 34 treesize of output 29 [2021-08-06 14:26:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:22,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035208575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:22,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:22,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:22,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140922156] [2021-08-06 14:26:22,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:22,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:22,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:22,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:22,668 INFO L87 Difference]: Start difference. First operand 185 states and 485 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:22,947 INFO L93 Difference]: Finished difference Result 265 states and 660 transitions. [2021-08-06 14:26:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:26:22,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:22,948 INFO L225 Difference]: With dead ends: 265 [2021-08-06 14:26:22,948 INFO L226 Difference]: Without dead ends: 265 [2021-08-06 14:26:22,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:26:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-06 14:26:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 188. [2021-08-06 14:26:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.641711229946524) internal successors, (494), 187 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 494 transitions. [2021-08-06 14:26:22,952 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 494 transitions. Word has length 15 [2021-08-06 14:26:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:22,952 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 494 transitions. [2021-08-06 14:26:22,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 494 transitions. [2021-08-06 14:26:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:22,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:22,953 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:22,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 14:26:23,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:23,153 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:23,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:23,154 INFO L82 PathProgramCache]: Analyzing trace with hash -442778249, now seen corresponding path program 94 times [2021-08-06 14:26:23,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:23,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872697151] [2021-08-06 14:26:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:23,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:23,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:23,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872697151] [2021-08-06 14:26:23,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872697151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:23,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321467624] [2021-08-06 14:26:23,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:23,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:23,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:23,272 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:23,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 14:26:25,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:25,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:25,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:25,302 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:25,302 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 43 treesize of output 40 [2021-08-06 14:26:25,307 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:25,307 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 34 [2021-08-06 14:26:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:25,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321467624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:25,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:25,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:25,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912794519] [2021-08-06 14:26:25,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:25,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:25,360 INFO L87 Difference]: Start difference. First operand 188 states and 494 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:25,665 INFO L93 Difference]: Finished difference Result 256 states and 639 transitions. [2021-08-06 14:26:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:26:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:25,666 INFO L225 Difference]: With dead ends: 256 [2021-08-06 14:26:25,666 INFO L226 Difference]: Without dead ends: 254 [2021-08-06 14:26:25,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:26:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-06 14:26:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 190. [2021-08-06 14:26:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.64021164021164) internal successors, (499), 189 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 499 transitions. [2021-08-06 14:26:25,669 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 499 transitions. Word has length 15 [2021-08-06 14:26:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:25,669 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 499 transitions. [2021-08-06 14:26:25,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 499 transitions. [2021-08-06 14:26:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:25,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:25,669 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:25,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:25,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 14:26:25,877 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:25,877 INFO L82 PathProgramCache]: Analyzing trace with hash 484652857, now seen corresponding path program 95 times [2021-08-06 14:26:25,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:25,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557115057] [2021-08-06 14:26:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:25,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:25,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:25,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557115057] [2021-08-06 14:26:25,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557115057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:25,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602784096] [2021-08-06 14:26:25,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:25,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:25,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:25,977 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:25,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 14:26:27,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:26:27,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:27,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:27,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:27,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:26:27,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:27,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:26:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:28,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602784096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:28,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:28,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:28,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971920501] [2021-08-06 14:26:28,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:28,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:28,059 INFO L87 Difference]: Start difference. First operand 190 states and 499 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:28,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:28,471 INFO L93 Difference]: Finished difference Result 323 states and 747 transitions. [2021-08-06 14:26:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:26:28,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:28,472 INFO L225 Difference]: With dead ends: 323 [2021-08-06 14:26:28,472 INFO L226 Difference]: Without dead ends: 323 [2021-08-06 14:26:28,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:26:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-08-06 14:26:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 193. [2021-08-06 14:26:28,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.6614583333333335) internal successors, (511), 192 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 511 transitions. [2021-08-06 14:26:28,475 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 511 transitions. Word has length 15 [2021-08-06 14:26:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:28,476 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 511 transitions. [2021-08-06 14:26:28,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 511 transitions. [2021-08-06 14:26:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:28,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:28,476 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:28,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:28,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:28,683 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:28,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:28,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1286269085, now seen corresponding path program 96 times [2021-08-06 14:26:28,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:28,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763413392] [2021-08-06 14:26:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:28,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:28,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:28,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763413392] [2021-08-06 14:26:28,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763413392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:28,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246504118] [2021-08-06 14:26:28,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:28,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:28,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:28,768 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:28,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 14:26:30,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:26:30,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:30,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:30,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:30,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:26:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:30,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:26:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:30,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246504118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:30,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:30,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:30,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507655394] [2021-08-06 14:26:30,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:30,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:30,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:30,899 INFO L87 Difference]: Start difference. First operand 193 states and 511 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:31,411 INFO L93 Difference]: Finished difference Result 289 states and 696 transitions. [2021-08-06 14:26:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:26:31,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:31,412 INFO L225 Difference]: With dead ends: 289 [2021-08-06 14:26:31,412 INFO L226 Difference]: Without dead ends: 286 [2021-08-06 14:26:31,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:26:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-06 14:26:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 195. [2021-08-06 14:26:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.6649484536082473) internal successors, (517), 194 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 517 transitions. [2021-08-06 14:26:31,415 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 517 transitions. Word has length 15 [2021-08-06 14:26:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:31,416 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 517 transitions. [2021-08-06 14:26:31,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 517 transitions. [2021-08-06 14:26:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:31,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:31,416 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:31,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:31,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:31,625 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1290354505, now seen corresponding path program 97 times [2021-08-06 14:26:31,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:31,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316124552] [2021-08-06 14:26:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:31,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:31,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:31,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316124552] [2021-08-06 14:26:31,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316124552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:31,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575675491] [2021-08-06 14:26:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:31,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:31,765 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:31,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 14:26:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:33,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:33,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:33,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:26:33,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:33,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:26:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:33,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575675491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:33,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:33,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:33,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079192561] [2021-08-06 14:26:33,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:33,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:33,913 INFO L87 Difference]: Start difference. First operand 195 states and 517 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:34,198 INFO L93 Difference]: Finished difference Result 278 states and 680 transitions. [2021-08-06 14:26:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:26:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:34,199 INFO L225 Difference]: With dead ends: 278 [2021-08-06 14:26:34,199 INFO L226 Difference]: Without dead ends: 278 [2021-08-06 14:26:34,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:26:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-06 14:26:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 192. [2021-08-06 14:26:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.649214659685864) internal successors, (506), 191 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 506 transitions. [2021-08-06 14:26:34,201 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 506 transitions. Word has length 15 [2021-08-06 14:26:34,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:34,202 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 506 transitions. [2021-08-06 14:26:34,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:34,202 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 506 transitions. [2021-08-06 14:26:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:34,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:34,202 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:34,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:34,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:34,409 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1950903055, now seen corresponding path program 98 times [2021-08-06 14:26:34,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:34,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669363669] [2021-08-06 14:26:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:34,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:34,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:34,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669363669] [2021-08-06 14:26:34,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669363669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:34,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392106158] [2021-08-06 14:26:34,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:34,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:34,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:34,534 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:34,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 14:26:36,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:36,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:36,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:36,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:36,628 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:36,628 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 41 treesize of output 38 [2021-08-06 14:26:36,645 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:36,645 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 34 treesize of output 29 [2021-08-06 14:26:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:36,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392106158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:36,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:36,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:36,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283455404] [2021-08-06 14:26:36,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:36,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:36,680 INFO L87 Difference]: Start difference. First operand 192 states and 506 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:36,812 INFO L93 Difference]: Finished difference Result 235 states and 592 transitions. [2021-08-06 14:26:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:26:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:36,813 INFO L225 Difference]: With dead ends: 235 [2021-08-06 14:26:36,813 INFO L226 Difference]: Without dead ends: 235 [2021-08-06 14:26:36,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-06 14:26:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 197. [2021-08-06 14:26:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.6479591836734695) internal successors, (519), 196 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 519 transitions. [2021-08-06 14:26:36,815 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 519 transitions. Word has length 15 [2021-08-06 14:26:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:36,815 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 519 transitions. [2021-08-06 14:26:36,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 519 transitions. [2021-08-06 14:26:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:36,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:36,816 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:36,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:37,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 14:26:37,025 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash -396853931, now seen corresponding path program 99 times [2021-08-06 14:26:37,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:37,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701230833] [2021-08-06 14:26:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:37,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:37,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:37,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701230833] [2021-08-06 14:26:37,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701230833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:37,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99323198] [2021-08-06 14:26:37,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:37,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:37,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:37,152 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:37,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 14:26:39,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:26:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:39,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:39,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:39,290 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:39,290 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 43 treesize of output 40 [2021-08-06 14:26:39,294 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:39,295 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 34 [2021-08-06 14:26:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:39,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99323198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:39,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:39,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:39,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982582317] [2021-08-06 14:26:39,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:39,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:39,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:39,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:39,356 INFO L87 Difference]: Start difference. First operand 197 states and 519 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:39,532 INFO L93 Difference]: Finished difference Result 227 states and 569 transitions. [2021-08-06 14:26:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:26:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:39,533 INFO L225 Difference]: With dead ends: 227 [2021-08-06 14:26:39,533 INFO L226 Difference]: Without dead ends: 224 [2021-08-06 14:26:39,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:26:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-06 14:26:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 198. [2021-08-06 14:26:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.6345177664974617) internal successors, (519), 197 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 519 transitions. [2021-08-06 14:26:39,535 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 519 transitions. Word has length 15 [2021-08-06 14:26:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:39,535 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 519 transitions. [2021-08-06 14:26:39,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:39,535 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 519 transitions. [2021-08-06 14:26:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:39,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:39,536 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:39,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:39,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:39,753 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1711260717, now seen corresponding path program 100 times [2021-08-06 14:26:39,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:39,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117782208] [2021-08-06 14:26:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:39,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:39,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:39,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117782208] [2021-08-06 14:26:39,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117782208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:39,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75889800] [2021-08-06 14:26:39,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:39,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:39,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:39,907 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:39,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 14:26:41,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:41,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:41,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:41,974 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:41,974 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 41 treesize of output 38 [2021-08-06 14:26:41,979 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:41,979 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 34 treesize of output 29 [2021-08-06 14:26:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:42,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75889800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:42,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:42,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:42,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168187191] [2021-08-06 14:26:42,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:42,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:42,012 INFO L87 Difference]: Start difference. First operand 198 states and 519 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:42,248 INFO L93 Difference]: Finished difference Result 234 states and 592 transitions. [2021-08-06 14:26:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:26:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:42,249 INFO L225 Difference]: With dead ends: 234 [2021-08-06 14:26:42,249 INFO L226 Difference]: Without dead ends: 234 [2021-08-06 14:26:42,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:26:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-06 14:26:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-08-06 14:26:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.6530612244897958) internal successors, (520), 196 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 520 transitions. [2021-08-06 14:26:42,252 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 520 transitions. Word has length 15 [2021-08-06 14:26:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:42,252 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 520 transitions. [2021-08-06 14:26:42,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 520 transitions. [2021-08-06 14:26:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:42,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:42,252 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:42,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:42,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:42,474 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1664005871, now seen corresponding path program 101 times [2021-08-06 14:26:42,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:42,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976163216] [2021-08-06 14:26:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:42,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:42,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:42,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976163216] [2021-08-06 14:26:42,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976163216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:42,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047815278] [2021-08-06 14:26:42,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:42,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:42,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:42,594 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:42,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 14:26:44,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:44,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:44,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:44,701 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:44,702 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 43 treesize of output 40 [2021-08-06 14:26:44,706 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:44,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 34 [2021-08-06 14:26:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:44,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047815278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:44,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:44,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:44,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293471681] [2021-08-06 14:26:44,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:44,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:44,758 INFO L87 Difference]: Start difference. First operand 197 states and 520 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:44,912 INFO L93 Difference]: Finished difference Result 222 states and 567 transitions. [2021-08-06 14:26:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:26:44,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:44,913 INFO L225 Difference]: With dead ends: 222 [2021-08-06 14:26:44,913 INFO L226 Difference]: Without dead ends: 220 [2021-08-06 14:26:44,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-08-06 14:26:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 198. [2021-08-06 14:26:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.649746192893401) internal successors, (522), 197 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 522 transitions. [2021-08-06 14:26:44,915 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 522 transitions. Word has length 15 [2021-08-06 14:26:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:44,916 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 522 transitions. [2021-08-06 14:26:44,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 522 transitions. [2021-08-06 14:26:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:44,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:44,916 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:44,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:45,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 14:26:45,138 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1703530319, now seen corresponding path program 102 times [2021-08-06 14:26:45,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:45,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128703170] [2021-08-06 14:26:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:45,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:45,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:45,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128703170] [2021-08-06 14:26:45,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128703170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:45,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106060046] [2021-08-06 14:26:45,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:45,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:45,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:45,247 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:45,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 14:26:47,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:26:47,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:47,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:47,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:26:47,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:47,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:26:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:47,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106060046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:47,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:47,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:47,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900105744] [2021-08-06 14:26:47,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:47,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:47,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:47,330 INFO L87 Difference]: Start difference. First operand 198 states and 522 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:47,625 INFO L93 Difference]: Finished difference Result 292 states and 679 transitions. [2021-08-06 14:26:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:26:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:47,626 INFO L225 Difference]: With dead ends: 292 [2021-08-06 14:26:47,626 INFO L226 Difference]: Without dead ends: 292 [2021-08-06 14:26:47,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:26:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-06 14:26:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 198. [2021-08-06 14:26:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.6548223350253806) internal successors, (523), 197 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 523 transitions. [2021-08-06 14:26:47,629 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 523 transitions. Word has length 15 [2021-08-06 14:26:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:47,629 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 523 transitions. [2021-08-06 14:26:47,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 523 transitions. [2021-08-06 14:26:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:47,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:47,629 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:47,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 14:26:47,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 14:26:47,851 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:47,852 INFO L82 PathProgramCache]: Analyzing trace with hash -901914091, now seen corresponding path program 103 times [2021-08-06 14:26:47,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:47,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204882391] [2021-08-06 14:26:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:47,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:47,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:47,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204882391] [2021-08-06 14:26:47,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204882391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:47,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948396475] [2021-08-06 14:26:47,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:47,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:47,942 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:47,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 14:26:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:49,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:49,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:49,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:26:50,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:26:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:50,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948396475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:50,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:50,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:50,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693268906] [2021-08-06 14:26:50,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:50,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:50,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:50,073 INFO L87 Difference]: Start difference. First operand 198 states and 523 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:50,293 INFO L93 Difference]: Finished difference Result 254 states and 618 transitions. [2021-08-06 14:26:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:26:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:50,294 INFO L225 Difference]: With dead ends: 254 [2021-08-06 14:26:50,294 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 14:26:50,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:26:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 14:26:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 202. [2021-08-06 14:26:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.6666666666666665) internal successors, (536), 201 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 536 transitions. [2021-08-06 14:26:50,297 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 536 transitions. Word has length 15 [2021-08-06 14:26:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:50,297 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 536 transitions. [2021-08-06 14:26:50,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:50,297 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 536 transitions. [2021-08-06 14:26:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:50,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:50,298 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:50,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:50,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:50,521 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:50,521 INFO L82 PathProgramCache]: Analyzing trace with hash 816429615, now seen corresponding path program 104 times [2021-08-06 14:26:50,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:50,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314392292] [2021-08-06 14:26:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:50,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:50,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:50,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314392292] [2021-08-06 14:26:50,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314392292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:50,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106824983] [2021-08-06 14:26:50,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:50,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:50,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:50,632 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:50,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 14:26:52,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:52,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:52,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:52,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:26:52,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:52,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:26:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:52,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106824983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:52,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:52,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:52,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982882724] [2021-08-06 14:26:52,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:52,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:52,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:52,842 INFO L87 Difference]: Start difference. First operand 202 states and 536 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:53,047 INFO L93 Difference]: Finished difference Result 252 states and 616 transitions. [2021-08-06 14:26:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:26:53,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:53,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:53,048 INFO L225 Difference]: With dead ends: 252 [2021-08-06 14:26:53,048 INFO L226 Difference]: Without dead ends: 252 [2021-08-06 14:26:53,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-08-06 14:26:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 198. [2021-08-06 14:26:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.649746192893401) internal successors, (522), 197 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 522 transitions. [2021-08-06 14:26:53,050 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 522 transitions. Word has length 15 [2021-08-06 14:26:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:53,050 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 522 transitions. [2021-08-06 14:26:53,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 522 transitions. [2021-08-06 14:26:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:53,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:53,051 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:53,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:53,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:53,261 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:53,261 INFO L82 PathProgramCache]: Analyzing trace with hash -638175337, now seen corresponding path program 105 times [2021-08-06 14:26:53,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:53,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618586651] [2021-08-06 14:26:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:53,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:53,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:53,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618586651] [2021-08-06 14:26:53,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618586651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:53,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573931150] [2021-08-06 14:26:53,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:53,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:53,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:53,386 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:53,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 14:26:55,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:26:55,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:55,567 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:55,567 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 41 treesize of output 38 [2021-08-06 14:26:55,572 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:55,572 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 34 treesize of output 29 [2021-08-06 14:26:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:55,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573931150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:55,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:55,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:55,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123188316] [2021-08-06 14:26:55,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:55,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:55,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:55,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:55,607 INFO L87 Difference]: Start difference. First operand 198 states and 522 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:55,832 INFO L93 Difference]: Finished difference Result 270 states and 658 transitions. [2021-08-06 14:26:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:26:55,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:55,833 INFO L225 Difference]: With dead ends: 270 [2021-08-06 14:26:55,833 INFO L226 Difference]: Without dead ends: 270 [2021-08-06 14:26:55,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-08-06 14:26:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 202. [2021-08-06 14:26:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.671641791044776) internal successors, (537), 201 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 537 transitions. [2021-08-06 14:26:55,835 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 537 transitions. Word has length 15 [2021-08-06 14:26:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:55,836 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 537 transitions. [2021-08-06 14:26:55,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 537 transitions. [2021-08-06 14:26:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:55,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:55,836 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:55,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 14:26:56,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-06 14:26:56,050 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1557876045, now seen corresponding path program 106 times [2021-08-06 14:26:56,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:56,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233736282] [2021-08-06 14:26:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:56,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:56,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:56,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233736282] [2021-08-06 14:26:56,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233736282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:56,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389842829] [2021-08-06 14:26:56,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:56,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:56,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:56,144 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:56,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 14:26:58,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:58,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:58,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:26:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:58,393 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:58,394 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 43 treesize of output 40 [2021-08-06 14:26:58,398 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:58,398 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 34 [2021-08-06 14:26:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:58,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389842829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:58,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:58,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:58,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934686780] [2021-08-06 14:26:58,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:58,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:58,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:58,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:58,458 INFO L87 Difference]: Start difference. First operand 202 states and 537 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:58,822 INFO L93 Difference]: Finished difference Result 245 states and 607 transitions. [2021-08-06 14:26:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:26:58,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:26:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:58,823 INFO L225 Difference]: With dead ends: 245 [2021-08-06 14:26:58,823 INFO L226 Difference]: Without dead ends: 241 [2021-08-06 14:26:58,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:26:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-06 14:26:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 202. [2021-08-06 14:26:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.656716417910448) internal successors, (534), 201 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 534 transitions. [2021-08-06 14:26:58,826 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 534 transitions. Word has length 15 [2021-08-06 14:26:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:58,826 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 534 transitions. [2021-08-06 14:26:58,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 534 transitions. [2021-08-06 14:26:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:26:58,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:58,826 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:58,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:59,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:59,037 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:26:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:59,037 INFO L82 PathProgramCache]: Analyzing trace with hash 977076247, now seen corresponding path program 107 times [2021-08-06 14:26:59,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:59,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018400133] [2021-08-06 14:26:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:59,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:59,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:59,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018400133] [2021-08-06 14:26:59,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018400133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:59,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348446807] [2021-08-06 14:26:59,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:59,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:59,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:59,135 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:59,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 14:27:01,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:27:01,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:01,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:01,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:01,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:01,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:01,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348446807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:01,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:01,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:27:01,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998961681] [2021-08-06 14:27:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:01,544 INFO L87 Difference]: Start difference. First operand 202 states and 534 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:01,937 INFO L93 Difference]: Finished difference Result 256 states and 617 transitions. [2021-08-06 14:27:01,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:27:01,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:01,938 INFO L225 Difference]: With dead ends: 256 [2021-08-06 14:27:01,938 INFO L226 Difference]: Without dead ends: 252 [2021-08-06 14:27:01,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:27:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-08-06 14:27:01,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 202. [2021-08-06 14:27:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.63681592039801) internal successors, (530), 201 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 530 transitions. [2021-08-06 14:27:01,941 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 530 transitions. Word has length 15 [2021-08-06 14:27:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:01,941 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 530 transitions. [2021-08-06 14:27:01,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 530 transitions. [2021-08-06 14:27:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:01,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:01,941 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:01,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 14:27:02,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:02,149 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:02,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2119849935, now seen corresponding path program 108 times [2021-08-06 14:27:02,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:02,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351861612] [2021-08-06 14:27:02,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:02,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:02,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:02,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351861612] [2021-08-06 14:27:02,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351861612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:02,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79319938] [2021-08-06 14:27:02,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:02,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:02,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:02,269 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:02,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 14:27:04,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:27:04,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:04,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:04,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:04,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:04,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:04,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:04,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79319938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:04,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:04,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:27:04,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900975236] [2021-08-06 14:27:04,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:04,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:04,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:04,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:04,597 INFO L87 Difference]: Start difference. First operand 202 states and 530 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:04,898 INFO L93 Difference]: Finished difference Result 311 states and 716 transitions. [2021-08-06 14:27:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:27:04,898 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:04,899 INFO L225 Difference]: With dead ends: 311 [2021-08-06 14:27:04,899 INFO L226 Difference]: Without dead ends: 311 [2021-08-06 14:27:04,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:27:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-06 14:27:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 207. [2021-08-06 14:27:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.6601941747572817) internal successors, (548), 206 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 548 transitions. [2021-08-06 14:27:04,901 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 548 transitions. Word has length 15 [2021-08-06 14:27:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:04,902 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 548 transitions. [2021-08-06 14:27:04,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 548 transitions. [2021-08-06 14:27:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:04,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:04,902 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:04,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 14:27:05,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-08-06 14:27:05,109 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1318233707, now seen corresponding path program 109 times [2021-08-06 14:27:05,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:05,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424667943] [2021-08-06 14:27:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:05,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:05,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:05,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424667943] [2021-08-06 14:27:05,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424667943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:05,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835720756] [2021-08-06 14:27:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:05,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:05,202 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:05,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 14:27:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:07,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:07,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:07,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:07,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:07,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:07,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:07,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835720756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:07,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:07,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:27:07,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578585801] [2021-08-06 14:27:07,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:07,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:07,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:07,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:07,538 INFO L87 Difference]: Start difference. First operand 207 states and 548 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:07,854 INFO L93 Difference]: Finished difference Result 303 states and 702 transitions. [2021-08-06 14:27:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:27:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:07,855 INFO L225 Difference]: With dead ends: 303 [2021-08-06 14:27:07,855 INFO L226 Difference]: Without dead ends: 297 [2021-08-06 14:27:07,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:27:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-06 14:27:07,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 210. [2021-08-06 14:27:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.645933014354067) internal successors, (553), 209 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 553 transitions. [2021-08-06 14:27:07,858 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 553 transitions. Word has length 15 [2021-08-06 14:27:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:07,859 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 553 transitions. [2021-08-06 14:27:07,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 553 transitions. [2021-08-06 14:27:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:07,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:07,859 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:07,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:08,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:08,082 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:08,082 INFO L82 PathProgramCache]: Analyzing trace with hash 400109999, now seen corresponding path program 110 times [2021-08-06 14:27:08,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:08,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297315777] [2021-08-06 14:27:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:08,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:08,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:08,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297315777] [2021-08-06 14:27:08,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297315777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:08,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215586592] [2021-08-06 14:27:08,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:27:08,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:08,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:08,150 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:08,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 14:27:10,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:10,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:10,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:10,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:10,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:10,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:10,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215586592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:10,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:10,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:27:10,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880613410] [2021-08-06 14:27:10,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:10,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:10,413 INFO L87 Difference]: Start difference. First operand 210 states and 553 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:10,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:10,640 INFO L93 Difference]: Finished difference Result 287 states and 677 transitions. [2021-08-06 14:27:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:27:10,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:10,641 INFO L225 Difference]: With dead ends: 287 [2021-08-06 14:27:10,641 INFO L226 Difference]: Without dead ends: 287 [2021-08-06 14:27:10,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:27:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-06 14:27:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 207. [2021-08-06 14:27:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.6262135922330097) internal successors, (541), 206 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 541 transitions. [2021-08-06 14:27:10,644 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 541 transitions. Word has length 15 [2021-08-06 14:27:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:10,644 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 541 transitions. [2021-08-06 14:27:10,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 541 transitions. [2021-08-06 14:27:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:10,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:10,645 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:10,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 14:27:10,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 14:27:10,867 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1310503309, now seen corresponding path program 111 times [2021-08-06 14:27:10,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:10,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142412672] [2021-08-06 14:27:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:10,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:10,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:10,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142412672] [2021-08-06 14:27:10,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142412672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:10,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133816714] [2021-08-06 14:27:10,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:27:10,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:10,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:10,978 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:10,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 14:27:13,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:27:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:13,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:13,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:27:13,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:27:13,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:13,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:27:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:13,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133816714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:13,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:13,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:27:13,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13430579] [2021-08-06 14:27:13,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:13,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:13,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:13,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:13,303 INFO L87 Difference]: Start difference. First operand 207 states and 541 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:13,525 INFO L93 Difference]: Finished difference Result 287 states and 678 transitions. [2021-08-06 14:27:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:27:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:13,525 INFO L225 Difference]: With dead ends: 287 [2021-08-06 14:27:13,525 INFO L226 Difference]: Without dead ends: 287 [2021-08-06 14:27:13,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-06 14:27:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 207. [2021-08-06 14:27:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.6262135922330097) internal successors, (541), 206 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 541 transitions. [2021-08-06 14:27:13,528 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 541 transitions. Word has length 15 [2021-08-06 14:27:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:13,528 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 541 transitions. [2021-08-06 14:27:13,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 541 transitions. [2021-08-06 14:27:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:13,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:13,529 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:13,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 14:27:13,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 14:27:13,729 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:13,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:13,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1065104775, now seen corresponding path program 112 times [2021-08-06 14:27:13,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:13,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861490017] [2021-08-06 14:27:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:13,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:13,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:13,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861490017] [2021-08-06 14:27:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861490017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:13,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481284750] [2021-08-06 14:27:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:27:13,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:13,879 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:13,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 14:27:15,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:27:15,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:15,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:16,212 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:16,212 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 41 treesize of output 38 [2021-08-06 14:27:16,217 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:16,218 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 34 treesize of output 29 [2021-08-06 14:27:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:16,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481284750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:16,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:16,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:16,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197140181] [2021-08-06 14:27:16,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:16,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:16,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:16,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:16,250 INFO L87 Difference]: Start difference. First operand 207 states and 541 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:16,395 INFO L93 Difference]: Finished difference Result 295 states and 702 transitions. [2021-08-06 14:27:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:27:16,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 15 [2021-08-06 14:27:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:16,396 INFO L225 Difference]: With dead ends: 295 [2021-08-06 14:27:16,396 INFO L226 Difference]: Without dead ends: 295 [2021-08-06 14:27:16,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-08-06 14:27:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 221. [2021-08-06 14:27:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6636363636363636) internal successors, (586), 220 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 586 transitions. [2021-08-06 14:27:16,399 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 586 transitions. Word has length 15 [2021-08-06 14:27:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:16,399 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 586 transitions. [2021-08-06 14:27:16,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 586 transitions. [2021-08-06 14:27:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:16,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:16,400 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:16,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 14:27:16,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 14:27:16,622 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash 488944349, now seen corresponding path program 113 times [2021-08-06 14:27:16,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:16,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419737600] [2021-08-06 14:27:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:16,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:16,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:16,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419737600] [2021-08-06 14:27:16,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419737600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:16,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418128186] [2021-08-06 14:27:16,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:16,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:16,745 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:16,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 14:27:18,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:27:18,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:18,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:18,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:19,090 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:19,090 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 43 treesize of output 40 [2021-08-06 14:27:19,094 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:19,094 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 34 [2021-08-06 14:27:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:19,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418128186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:19,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:19,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:19,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875406132] [2021-08-06 14:27:19,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:19,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:19,147 INFO L87 Difference]: Start difference. First operand 221 states and 586 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:19,402 INFO L93 Difference]: Finished difference Result 275 states and 660 transitions. [2021-08-06 14:27:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:27:19,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:19,403 INFO L225 Difference]: With dead ends: 275 [2021-08-06 14:27:19,403 INFO L226 Difference]: Without dead ends: 272 [2021-08-06 14:27:19,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:27:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-06 14:27:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 224. [2021-08-06 14:27:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6457399103139014) internal successors, (590), 223 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 590 transitions. [2021-08-06 14:27:19,406 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 590 transitions. Word has length 15 [2021-08-06 14:27:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:19,406 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 590 transitions. [2021-08-06 14:27:19,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 590 transitions. [2021-08-06 14:27:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:19,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:19,407 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:19,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:19,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:19,611 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:19,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:19,612 INFO L82 PathProgramCache]: Analyzing trace with hash -825462437, now seen corresponding path program 114 times [2021-08-06 14:27:19,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:19,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422442903] [2021-08-06 14:27:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:19,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:19,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:19,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422442903] [2021-08-06 14:27:19,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422442903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:19,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724172083] [2021-08-06 14:27:19,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:19,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:19,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:19,712 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:19,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 14:27:21,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:27:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:21,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:22,127 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:22,128 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 41 treesize of output 38 [2021-08-06 14:27:22,132 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:22,132 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 34 treesize of output 29 [2021-08-06 14:27:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:22,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724172083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:22,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:22,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:22,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152241698] [2021-08-06 14:27:22,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:22,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:22,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:22,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:22,167 INFO L87 Difference]: Start difference. First operand 224 states and 590 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:22,573 INFO L93 Difference]: Finished difference Result 304 states and 720 transitions. [2021-08-06 14:27:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:27:22,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 15 [2021-08-06 14:27:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:22,574 INFO L225 Difference]: With dead ends: 304 [2021-08-06 14:27:22,574 INFO L226 Difference]: Without dead ends: 304 [2021-08-06 14:27:22,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:27:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-06 14:27:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 220. [2021-08-06 14:27:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.6666666666666665) internal successors, (584), 219 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 584 transitions. [2021-08-06 14:27:22,577 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 584 transitions. Word has length 15 [2021-08-06 14:27:22,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:22,577 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 584 transitions. [2021-08-06 14:27:22,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 584 transitions. [2021-08-06 14:27:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:22,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:22,578 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:22,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:22,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 14:27:22,789 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1745163145, now seen corresponding path program 115 times [2021-08-06 14:27:22,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:22,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123528201] [2021-08-06 14:27:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:22,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:22,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:22,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123528201] [2021-08-06 14:27:22,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123528201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:22,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695135190] [2021-08-06 14:27:22,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:22,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:22,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:22,905 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:22,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 14:27:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:25,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:25,348 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:25,349 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 43 treesize of output 40 [2021-08-06 14:27:25,354 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:25,354 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 34 [2021-08-06 14:27:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:25,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695135190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:25,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:25,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:25,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351929020] [2021-08-06 14:27:25,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:25,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:25,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:25,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:25,413 INFO L87 Difference]: Start difference. First operand 220 states and 584 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:25,738 INFO L93 Difference]: Finished difference Result 266 states and 650 transitions. [2021-08-06 14:27:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:27:25,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:25,739 INFO L225 Difference]: With dead ends: 266 [2021-08-06 14:27:25,739 INFO L226 Difference]: Without dead ends: 264 [2021-08-06 14:27:25,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:27:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-06 14:27:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 221. [2021-08-06 14:27:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6636363636363636) internal successors, (586), 220 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 586 transitions. [2021-08-06 14:27:25,769 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 586 transitions. Word has length 15 [2021-08-06 14:27:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:25,769 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 586 transitions. [2021-08-06 14:27:25,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 586 transitions. [2021-08-06 14:27:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:25,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:25,770 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:25,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:25,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 14:27:25,970 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:25,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:25,970 INFO L82 PathProgramCache]: Analyzing trace with hash -817732039, now seen corresponding path program 116 times [2021-08-06 14:27:25,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:25,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220497131] [2021-08-06 14:27:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:25,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:26,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:26,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220497131] [2021-08-06 14:27:26,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220497131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:26,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766327507] [2021-08-06 14:27:26,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:27:26,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:26,101 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:26,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 14:27:28,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:28,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:28,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:28,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:28,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:28,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:28,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:28,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766327507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:28,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:28,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:28,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414275993] [2021-08-06 14:27:28,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:28,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:28,612 INFO L87 Difference]: Start difference. First operand 221 states and 586 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:29,042 INFO L93 Difference]: Finished difference Result 311 states and 709 transitions. [2021-08-06 14:27:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:27:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 15 [2021-08-06 14:27:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:29,043 INFO L225 Difference]: With dead ends: 311 [2021-08-06 14:27:29,043 INFO L226 Difference]: Without dead ends: 310 [2021-08-06 14:27:29,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:27:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-06 14:27:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 212. [2021-08-06 14:27:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.6303317535545023) internal successors, (555), 211 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 555 transitions. [2021-08-06 14:27:29,046 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 555 transitions. Word has length 15 [2021-08-06 14:27:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:29,046 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 555 transitions. [2021-08-06 14:27:29,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 555 transitions. [2021-08-06 14:27:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:29,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:29,047 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:29,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:29,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 14:27:29,257 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:29,257 INFO L82 PathProgramCache]: Analyzing trace with hash -16115811, now seen corresponding path program 117 times [2021-08-06 14:27:29,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:29,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471197760] [2021-08-06 14:27:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:29,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:29,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:29,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471197760] [2021-08-06 14:27:29,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471197760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:29,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554530989] [2021-08-06 14:27:29,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:27:29,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:29,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:29,372 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:29,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 14:27:31,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:27:31,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:31,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:31,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:31,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:31,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:31,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:31,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554530989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:31,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:31,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:31,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011284470] [2021-08-06 14:27:31,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:31,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:31,870 INFO L87 Difference]: Start difference. First operand 212 states and 555 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:32,275 INFO L93 Difference]: Finished difference Result 276 states and 654 transitions. [2021-08-06 14:27:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:27:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:32,276 INFO L225 Difference]: With dead ends: 276 [2021-08-06 14:27:32,276 INFO L226 Difference]: Without dead ends: 272 [2021-08-06 14:27:32,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:27:32,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-06 14:27:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 216. [2021-08-06 14:27:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.641860465116279) internal successors, (568), 215 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 568 transitions. [2021-08-06 14:27:32,279 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 568 transitions. Word has length 15 [2021-08-06 14:27:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:32,279 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 568 transitions. [2021-08-06 14:27:32,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 568 transitions. [2021-08-06 14:27:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:32,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:32,280 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:32,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:32,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:32,489 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1702227895, now seen corresponding path program 118 times [2021-08-06 14:27:32,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:32,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892782812] [2021-08-06 14:27:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:32,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:32,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:32,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892782812] [2021-08-06 14:27:32,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892782812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:32,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859276968] [2021-08-06 14:27:32,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:27:32,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:32,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:32,623 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:32,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 14:27:34,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:27:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:34,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:34,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:34,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:34,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:35,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859276968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:35,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:35,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:35,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437189676] [2021-08-06 14:27:35,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:35,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:35,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:35,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:35,068 INFO L87 Difference]: Start difference. First operand 216 states and 568 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:35,294 INFO L93 Difference]: Finished difference Result 267 states and 642 transitions. [2021-08-06 14:27:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:27:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:35,295 INFO L225 Difference]: With dead ends: 267 [2021-08-06 14:27:35,295 INFO L226 Difference]: Without dead ends: 267 [2021-08-06 14:27:35,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:27:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-06 14:27:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 205. [2021-08-06 14:27:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6127450980392157) internal successors, (533), 204 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 533 transitions. [2021-08-06 14:27:35,298 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 533 transitions. Word has length 15 [2021-08-06 14:27:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:35,298 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 533 transitions. [2021-08-06 14:27:35,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 533 transitions. [2021-08-06 14:27:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:35,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:35,298 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:35,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:35,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:35,513 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:35,513 INFO L82 PathProgramCache]: Analyzing trace with hash -846468645, now seen corresponding path program 119 times [2021-08-06 14:27:35,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:35,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309672354] [2021-08-06 14:27:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:35,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:35,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:35,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309672354] [2021-08-06 14:27:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309672354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:35,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994966722] [2021-08-06 14:27:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:35,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:35,642 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:35,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 14:27:37,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:27:37,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:38,092 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:38,092 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 41 treesize of output 38 [2021-08-06 14:27:38,097 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:38,097 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 34 treesize of output 29 [2021-08-06 14:27:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:38,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994966722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:38,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:38,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:27:38,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831729555] [2021-08-06 14:27:38,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:38,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:38,131 INFO L87 Difference]: Start difference. First operand 205 states and 533 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:38,271 INFO L93 Difference]: Finished difference Result 280 states and 676 transitions. [2021-08-06 14:27:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:27:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 15 [2021-08-06 14:27:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:38,272 INFO L225 Difference]: With dead ends: 280 [2021-08-06 14:27:38,272 INFO L226 Difference]: Without dead ends: 280 [2021-08-06 14:27:38,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-06 14:27:38,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 213. [2021-08-06 14:27:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.6556603773584904) internal successors, (563), 212 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 563 transitions. [2021-08-06 14:27:38,275 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 563 transitions. Word has length 15 [2021-08-06 14:27:38,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:38,275 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 563 transitions. [2021-08-06 14:27:38,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 563 transitions. [2021-08-06 14:27:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:38,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:38,276 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:38,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:38,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:38,489 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1766169353, now seen corresponding path program 120 times [2021-08-06 14:27:38,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:38,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666122035] [2021-08-06 14:27:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:38,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:38,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:38,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666122035] [2021-08-06 14:27:38,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666122035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:38,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344455921] [2021-08-06 14:27:38,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:38,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:38,559 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:38,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 14:27:40,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:27:40,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:40,985 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:40,985 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 43 treesize of output 40 [2021-08-06 14:27:41,004 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:41,005 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 34 [2021-08-06 14:27:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:41,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344455921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:41,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:41,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:27:41,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788075674] [2021-08-06 14:27:41,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:41,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:41,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:41,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:41,068 INFO L87 Difference]: Start difference. First operand 213 states and 563 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:41,312 INFO L93 Difference]: Finished difference Result 256 states and 626 transitions. [2021-08-06 14:27:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:27:41,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:41,313 INFO L225 Difference]: With dead ends: 256 [2021-08-06 14:27:41,313 INFO L226 Difference]: Without dead ends: 252 [2021-08-06 14:27:41,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:27:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-08-06 14:27:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 213. [2021-08-06 14:27:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.6462264150943398) internal successors, (561), 212 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 561 transitions. [2021-08-06 14:27:41,316 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 561 transitions. Word has length 15 [2021-08-06 14:27:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:41,316 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 561 transitions. [2021-08-06 14:27:41,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 561 transitions. [2021-08-06 14:27:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:41,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:41,317 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:41,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:41,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 14:27:41,540 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:41,540 INFO L82 PathProgramCache]: Analyzing trace with hash -838738247, now seen corresponding path program 121 times [2021-08-06 14:27:41,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:41,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309066229] [2021-08-06 14:27:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:41,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:41,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:41,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309066229] [2021-08-06 14:27:41,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309066229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:41,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260942713] [2021-08-06 14:27:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:41,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:41,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:41,644 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:41,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 14:27:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:43,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:44,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:44,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:44,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:44,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:44,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260942713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:44,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:44,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:27:44,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766337834] [2021-08-06 14:27:44,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:44,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:44,214 INFO L87 Difference]: Start difference. First operand 213 states and 561 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:44,463 INFO L93 Difference]: Finished difference Result 299 states and 694 transitions. [2021-08-06 14:27:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:27:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 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 15 [2021-08-06 14:27:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:44,464 INFO L225 Difference]: With dead ends: 299 [2021-08-06 14:27:44,464 INFO L226 Difference]: Without dead ends: 299 [2021-08-06 14:27:44,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:27:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-08-06 14:27:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 214. [2021-08-06 14:27:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.647887323943662) internal successors, (564), 213 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 564 transitions. [2021-08-06 14:27:44,467 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 564 transitions. Word has length 15 [2021-08-06 14:27:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:44,467 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 564 transitions. [2021-08-06 14:27:44,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 564 transitions. [2021-08-06 14:27:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:44,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:44,468 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:44,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:44,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 14:27:44,668 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash -37122019, now seen corresponding path program 122 times [2021-08-06 14:27:44,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:44,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907489559] [2021-08-06 14:27:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:44,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:44,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:44,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907489559] [2021-08-06 14:27:44,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907489559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:44,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291361457] [2021-08-06 14:27:44,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:27:44,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:44,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:44,771 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:44,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 14:27:46,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:46,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:47,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:47,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:47,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:47,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291361457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:47,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:47,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:27:47,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404028088] [2021-08-06 14:27:47,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:47,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:47,181 INFO L87 Difference]: Start difference. First operand 214 states and 564 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:47,493 INFO L93 Difference]: Finished difference Result 290 states and 678 transitions. [2021-08-06 14:27:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:27:47,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:47,493 INFO L225 Difference]: With dead ends: 290 [2021-08-06 14:27:47,493 INFO L226 Difference]: Without dead ends: 286 [2021-08-06 14:27:47,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:27:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-06 14:27:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 217. [2021-08-06 14:27:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.6527777777777777) internal successors, (573), 216 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 573 transitions. [2021-08-06 14:27:47,496 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 573 transitions. Word has length 15 [2021-08-06 14:27:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:47,496 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 573 transitions. [2021-08-06 14:27:47,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 573 transitions. [2021-08-06 14:27:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:47,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:47,497 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:47,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 14:27:47,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 14:27:47,720 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1681221687, now seen corresponding path program 123 times [2021-08-06 14:27:47,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:47,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18304854] [2021-08-06 14:27:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:47,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:47,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:47,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18304854] [2021-08-06 14:27:47,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18304854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:47,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149363110] [2021-08-06 14:27:47,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:27:47,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:47,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:47,839 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:47,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 14:27:50,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:27:50,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:50,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:50,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:50,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:50,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149363110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:50,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:50,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:27:50,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017401831] [2021-08-06 14:27:50,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:50,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:50,414 INFO L87 Difference]: Start difference. First operand 217 states and 573 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:50,597 INFO L93 Difference]: Finished difference Result 276 states and 663 transitions. [2021-08-06 14:27:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:27:50,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:50,598 INFO L225 Difference]: With dead ends: 276 [2021-08-06 14:27:50,598 INFO L226 Difference]: Without dead ends: 276 [2021-08-06 14:27:50,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-08-06 14:27:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 210. [2021-08-06 14:27:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.61244019138756) internal successors, (546), 209 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 546 transitions. [2021-08-06 14:27:50,601 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 546 transitions. Word has length 15 [2021-08-06 14:27:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:50,601 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 546 transitions. [2021-08-06 14:27:50,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 546 transitions. [2021-08-06 14:27:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:50,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:50,601 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:50,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:50,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 14:27:50,821 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:50,821 INFO L82 PathProgramCache]: Analyzing trace with hash -720622057, now seen corresponding path program 124 times [2021-08-06 14:27:50,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:50,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531972586] [2021-08-06 14:27:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:50,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:27:50,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:50,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531972586] [2021-08-06 14:27:50,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531972586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:50,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849495356] [2021-08-06 14:27:50,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:27:50,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:50,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:50,933 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:50,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 14:27:53,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:27:53,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:53,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:53,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:53,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:27:53,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:53,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:27:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:53,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849495356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:53,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:53,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:27:53,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508067262] [2021-08-06 14:27:53,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:53,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:53,550 INFO L87 Difference]: Start difference. First operand 210 states and 546 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:53,958 INFO L93 Difference]: Finished difference Result 268 states and 633 transitions. [2021-08-06 14:27:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:27:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:53,959 INFO L225 Difference]: With dead ends: 268 [2021-08-06 14:27:53,959 INFO L226 Difference]: Without dead ends: 264 [2021-08-06 14:27:53,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:27:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-06 14:27:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 210. [2021-08-06 14:27:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.602870813397129) internal successors, (544), 209 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 544 transitions. [2021-08-06 14:27:53,961 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 544 transitions. Word has length 15 [2021-08-06 14:27:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:53,962 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 544 transitions. [2021-08-06 14:27:53,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 544 transitions. [2021-08-06 14:27:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:53,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:53,962 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:53,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:54,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-06 14:27:54,169 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1008425277, now seen corresponding path program 125 times [2021-08-06 14:27:54,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:54,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191959485] [2021-08-06 14:27:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:54,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:27:54,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:54,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191959485] [2021-08-06 14:27:54,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191959485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:54,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518497932] [2021-08-06 14:27:54,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:54,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:54,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:54,263 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:54,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 14:27:56,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:56,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:56,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:27:56,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:56,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:27:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:56,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518497932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:56,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:56,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 14:27:56,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985365222] [2021-08-06 14:27:56,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:27:56,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:27:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:27:56,843 INFO L87 Difference]: Start difference. First operand 210 states and 544 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:57,135 INFO L93 Difference]: Finished difference Result 234 states and 579 transitions. [2021-08-06 14:27:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:27:57,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:27:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:57,136 INFO L225 Difference]: With dead ends: 234 [2021-08-06 14:27:57,136 INFO L226 Difference]: Without dead ends: 226 [2021-08-06 14:27:57,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:27:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-06 14:27:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 210. [2021-08-06 14:27:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.5933014354066986) internal successors, (542), 209 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 542 transitions. [2021-08-06 14:27:57,138 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 542 transitions. Word has length 15 [2021-08-06 14:27:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:57,138 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 542 transitions. [2021-08-06 14:27:57,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 542 transitions. [2021-08-06 14:27:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:27:57,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:57,139 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:57,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:57,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 14:27:57,349 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:27:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1255057863, now seen corresponding path program 126 times [2021-08-06 14:27:57,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:57,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743555238] [2021-08-06 14:27:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:57,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:57,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:57,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743555238] [2021-08-06 14:27:57,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743555238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:57,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497737970] [2021-08-06 14:27:57,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:57,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:57,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:57,461 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:57,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 14:27:59,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:27:59,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:27:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:00,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:00,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:28:00,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:00,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:28:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:00,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497737970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:00,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:00,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:00,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214131006] [2021-08-06 14:28:00,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:00,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:00,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:00,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:00,115 INFO L87 Difference]: Start difference. First operand 210 states and 542 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:00,401 INFO L93 Difference]: Finished difference Result 312 states and 724 transitions. [2021-08-06 14:28:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:28:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 15 [2021-08-06 14:28:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:00,402 INFO L225 Difference]: With dead ends: 312 [2021-08-06 14:28:00,402 INFO L226 Difference]: Without dead ends: 312 [2021-08-06 14:28:00,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:28:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-06 14:28:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 220. [2021-08-06 14:28:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.6392694063926943) internal successors, (578), 219 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 578 transitions. [2021-08-06 14:28:00,405 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 578 transitions. Word has length 15 [2021-08-06 14:28:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:00,405 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 578 transitions. [2021-08-06 14:28:00,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 578 transitions. [2021-08-06 14:28:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:28:00,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:00,405 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:00,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:00,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:00,613 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:00,613 INFO L82 PathProgramCache]: Analyzing trace with hash -453441635, now seen corresponding path program 127 times [2021-08-06 14:28:00,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:00,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241939522] [2021-08-06 14:28:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:00,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:00,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:00,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241939522] [2021-08-06 14:28:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241939522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:00,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029409206] [2021-08-06 14:28:00,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:28:00,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:00,712 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:00,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 14:28:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:03,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:28:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:03,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:28:03,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:03,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:28:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029409206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:03,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:03,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:03,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067005007] [2021-08-06 14:28:03,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:03,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:03,363 INFO L87 Difference]: Start difference. First operand 220 states and 578 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:03,869 INFO L93 Difference]: Finished difference Result 314 states and 734 transitions. [2021-08-06 14:28:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:28:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:28:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:03,870 INFO L225 Difference]: With dead ends: 314 [2021-08-06 14:28:03,870 INFO L226 Difference]: Without dead ends: 305 [2021-08-06 14:28:03,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:28:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-08-06 14:28:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 228. [2021-08-06 14:28:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.6519823788546257) internal successors, (602), 227 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 602 transitions. [2021-08-06 14:28:03,873 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 602 transitions. Word has length 15 [2021-08-06 14:28:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:03,873 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 602 transitions. [2021-08-06 14:28:03,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 602 transitions. [2021-08-06 14:28:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:28:03,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:03,873 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:03,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:04,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:04,077 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:04,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1264902071, now seen corresponding path program 128 times [2021-08-06 14:28:04,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:04,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485553425] [2021-08-06 14:28:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:04,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:04,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:04,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485553425] [2021-08-06 14:28:04,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485553425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:04,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041388554] [2021-08-06 14:28:04,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:28:04,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:04,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:04,199 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:04,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 14:28:06,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:28:06,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:28:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:06,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:06,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:28:06,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:06,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:28:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:06,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041388554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:06,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:06,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:06,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353979551] [2021-08-06 14:28:06,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:06,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:06,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:06,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:06,865 INFO L87 Difference]: Start difference. First operand 228 states and 602 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:07,209 INFO L93 Difference]: Finished difference Result 300 states and 713 transitions. [2021-08-06 14:28:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:28:07,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:28:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:07,210 INFO L225 Difference]: With dead ends: 300 [2021-08-06 14:28:07,210 INFO L226 Difference]: Without dead ends: 298 [2021-08-06 14:28:07,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:28:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-06 14:28:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 216. [2021-08-06 14:28:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.5860465116279068) internal successors, (556), 215 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 556 transitions. [2021-08-06 14:28:07,212 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 556 transitions. Word has length 15 [2021-08-06 14:28:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:07,213 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 556 transitions. [2021-08-06 14:28:07,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 556 transitions. [2021-08-06 14:28:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:28:07,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:07,213 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:07,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-06 14:28:07,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:07,437 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash -445711237, now seen corresponding path program 129 times [2021-08-06 14:28:07,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:07,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007512225] [2021-08-06 14:28:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:07,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:07,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:07,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007512225] [2021-08-06 14:28:07,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007512225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:07,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828151245] [2021-08-06 14:28:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:28:07,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:07,507 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:07,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 14:28:09,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:28:09,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:09,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:28:09,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:10,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:10,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:28:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:10,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:28:10,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:10,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:28:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:10,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828151245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:10,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:10,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:10,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177491278] [2021-08-06 14:28:10,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:10,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:10,112 INFO L87 Difference]: Start difference. First operand 216 states and 556 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:10,474 INFO L93 Difference]: Finished difference Result 279 states and 675 transitions. [2021-08-06 14:28:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:28:10,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:28:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:10,475 INFO L225 Difference]: With dead ends: 279 [2021-08-06 14:28:10,475 INFO L226 Difference]: Without dead ends: 279 [2021-08-06 14:28:10,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:28:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-06 14:28:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 213. [2021-08-06 14:28:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.5754716981132075) internal successors, (546), 212 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 546 transitions. [2021-08-06 14:28:10,478 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 546 transitions. Word has length 15 [2021-08-06 14:28:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:10,478 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 546 transitions. [2021-08-06 14:28:10,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 546 transitions. [2021-08-06 14:28:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:28:10,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:10,478 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:10,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:10,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:10,697 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1935116233, now seen corresponding path program 130 times [2021-08-06 14:28:10,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:10,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930039986] [2021-08-06 14:28:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:10,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:10,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:10,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930039986] [2021-08-06 14:28:10,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930039986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:10,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188128272] [2021-08-06 14:28:10,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:28:10,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:10,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:10,827 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:10,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 14:28:13,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:28:13,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 14:28:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:13,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:13,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:28:13,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:13,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:28:13,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:13,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:28:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:13,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188128272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:13,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:13,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:13,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196043289] [2021-08-06 14:28:13,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:13,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:13,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:13,364 INFO L87 Difference]: Start difference. First operand 213 states and 546 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:13,498 INFO L93 Difference]: Finished difference Result 243 states and 603 transitions. [2021-08-06 14:28:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:28:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:28:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:13,499 INFO L225 Difference]: With dead ends: 243 [2021-08-06 14:28:13,499 INFO L226 Difference]: Without dead ends: 243 [2021-08-06 14:28:13,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-08-06 14:28:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 205. [2021-08-06 14:28:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.5833333333333335) internal successors, (527), 204 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 527 transitions. [2021-08-06 14:28:13,501 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 527 transitions. Word has length 15 [2021-08-06 14:28:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:13,502 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 527 transitions. [2021-08-06 14:28:13,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:13,502 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 527 transitions. [2021-08-06 14:28:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:13,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:13,502 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:13,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:13,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:13,709 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash 757370353, now seen corresponding path program 131 times [2021-08-06 14:28:13,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:13,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103864958] [2021-08-06 14:28:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:13,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:14,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:14,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103864958] [2021-08-06 14:28:14,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103864958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:14,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771765255] [2021-08-06 14:28:14,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:28:14,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:14,291 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:14,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 14:28:16,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:28:16,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:16,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:28:16,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:17,624 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:28:17,625 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 96 treesize of output 79 [2021-08-06 14:28:17,630 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:17,630 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 62 treesize of output 53 [2021-08-06 14:28:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:17,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771765255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:17,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:17,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:28:17,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727096658] [2021-08-06 14:28:17,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:17,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:17,703 INFO L87 Difference]: Start difference. First operand 205 states and 527 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:18,849 INFO L93 Difference]: Finished difference Result 315 states and 785 transitions. [2021-08-06 14:28:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:28:18,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:28:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:18,850 INFO L225 Difference]: With dead ends: 315 [2021-08-06 14:28:18,850 INFO L226 Difference]: Without dead ends: 312 [2021-08-06 14:28:18,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1279.0ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:28:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-06 14:28:18,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 216. [2021-08-06 14:28:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.572093023255814) internal successors, (553), 215 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 553 transitions. [2021-08-06 14:28:18,853 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 553 transitions. Word has length 16 [2021-08-06 14:28:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:18,853 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 553 transitions. [2021-08-06 14:28:18,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 553 transitions. [2021-08-06 14:28:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:18,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:18,854 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:18,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:19,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:19,061 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:19,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1098862525, now seen corresponding path program 132 times [2021-08-06 14:28:19,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:19,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086746836] [2021-08-06 14:28:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:19,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:19,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:19,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086746836] [2021-08-06 14:28:19,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086746836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:19,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7267097] [2021-08-06 14:28:19,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:28:19,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:19,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:19,326 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:19,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 14:28:21,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:28:21,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:21,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:28:21,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:22,670 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:28:22,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 77 [2021-08-06 14:28:22,676 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:22,676 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 62 treesize of output 53 [2021-08-06 14:28:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:22,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7267097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:22,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:22,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:28:22,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397001657] [2021-08-06 14:28:22,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:22,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:22,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:22,744 INFO L87 Difference]: Start difference. First operand 216 states and 553 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:23,638 INFO L93 Difference]: Finished difference Result 313 states and 739 transitions. [2021-08-06 14:28:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:28:23,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:28:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:23,639 INFO L225 Difference]: With dead ends: 313 [2021-08-06 14:28:23,639 INFO L226 Difference]: Without dead ends: 308 [2021-08-06 14:28:23,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 949.3ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:28:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-08-06 14:28:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 217. [2021-08-06 14:28:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.5787037037037037) internal successors, (557), 216 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 557 transitions. [2021-08-06 14:28:23,642 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 557 transitions. Word has length 16 [2021-08-06 14:28:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:23,642 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 557 transitions. [2021-08-06 14:28:23,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 557 transitions. [2021-08-06 14:28:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:23,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:23,643 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:23,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:23,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 14:28:23,843 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:23,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1091132127, now seen corresponding path program 133 times [2021-08-06 14:28:23,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:23,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636188975] [2021-08-06 14:28:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:23,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:24,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:24,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636188975] [2021-08-06 14:28:24,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636188975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:24,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102647293] [2021-08-06 14:28:24,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:28:24,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:24,257 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:24,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 14:28:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:26,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:28:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:27,887 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:28:27,887 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 97 treesize of output 80 [2021-08-06 14:28:27,893 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:27,893 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 63 treesize of output 54 [2021-08-06 14:28:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:27,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102647293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:27,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:27,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:28:27,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379959023] [2021-08-06 14:28:27,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:28:27,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:27,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:28:27,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:28:27,992 INFO L87 Difference]: Start difference. First operand 217 states and 557 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:29,177 INFO L93 Difference]: Finished difference Result 321 states and 768 transitions. [2021-08-06 14:28:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:28:29,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:28:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:29,178 INFO L225 Difference]: With dead ends: 321 [2021-08-06 14:28:29,178 INFO L226 Difference]: Without dead ends: 315 [2021-08-06 14:28:29,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1334.0ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:28:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-06 14:28:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 227. [2021-08-06 14:28:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.6327433628318584) internal successors, (595), 226 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 595 transitions. [2021-08-06 14:28:29,181 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 595 transitions. Word has length 16 [2021-08-06 14:28:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:29,181 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 595 transitions. [2021-08-06 14:28:29,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 595 transitions. [2021-08-06 14:28:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:29,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:29,182 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:29,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:29,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 14:28:29,388 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:29,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1714430173, now seen corresponding path program 134 times [2021-08-06 14:28:29,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:29,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808318813] [2021-08-06 14:28:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:29,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:29,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:29,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808318813] [2021-08-06 14:28:29,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808318813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:29,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783105395] [2021-08-06 14:28:29,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:28:29,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:29,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:29,595 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:29,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 14:28:32,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:28:32,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:32,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 14:28:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:32,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:32,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:32,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:32,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:32,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2021-08-06 14:28:32,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:32,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2021-08-06 14:28:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:33,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783105395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:33,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:33,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:28:33,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475448309] [2021-08-06 14:28:33,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:28:33,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:28:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:28:33,050 INFO L87 Difference]: Start difference. First operand 227 states and 595 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:33,485 INFO L93 Difference]: Finished difference Result 286 states and 713 transitions. [2021-08-06 14:28:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:28:33,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:28:33,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:33,486 INFO L225 Difference]: With dead ends: 286 [2021-08-06 14:28:33,486 INFO L226 Difference]: Without dead ends: 278 [2021-08-06 14:28:33,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 591.2ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:28:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-06 14:28:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 232. [2021-08-06 14:28:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.6363636363636362) internal successors, (609), 231 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 609 transitions. [2021-08-06 14:28:33,489 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 609 transitions. Word has length 16 [2021-08-06 14:28:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:33,489 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 609 transitions. [2021-08-06 14:28:33,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 609 transitions. [2021-08-06 14:28:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:33,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:33,489 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:33,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:33,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 14:28:33,703 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:33,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1507451743, now seen corresponding path program 135 times [2021-08-06 14:28:33,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:33,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239960102] [2021-08-06 14:28:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:33,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:34,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:34,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239960102] [2021-08-06 14:28:34,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239960102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:34,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825395322] [2021-08-06 14:28:34,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:28:34,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:34,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:34,001 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:34,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 14:28:36,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:28:36,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:36,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 14:28:36,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:28:37,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:37,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2021-08-06 14:28:37,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:37,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2021-08-06 14:28:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:37,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825395322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:37,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:37,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 14:28:37,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822214862] [2021-08-06 14:28:37,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:37,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:37,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:37,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:37,727 INFO L87 Difference]: Start difference. First operand 232 states and 609 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:38,460 INFO L93 Difference]: Finished difference Result 320 states and 780 transitions. [2021-08-06 14:28:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:28:38,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:28:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:38,461 INFO L225 Difference]: With dead ends: 320 [2021-08-06 14:28:38,461 INFO L226 Difference]: Without dead ends: 314 [2021-08-06 14:28:38,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 839.6ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:28:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-06 14:28:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 245. [2021-08-06 14:28:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.639344262295082) internal successors, (644), 244 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 644 transitions. [2021-08-06 14:28:38,464 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 644 transitions. Word has length 16 [2021-08-06 14:28:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:38,464 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 644 transitions. [2021-08-06 14:28:38,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 644 transitions. [2021-08-06 14:28:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:38,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:38,464 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:38,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 14:28:38,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-06 14:28:38,673 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 608535423, now seen corresponding path program 136 times [2021-08-06 14:28:38,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:38,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374143486] [2021-08-06 14:28:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:38,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:39,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:39,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374143486] [2021-08-06 14:28:39,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374143486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:39,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202785563] [2021-08-06 14:28:39,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:28:39,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:39,210 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:39,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 14:28:41,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:28:41,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:41,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:28:41,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:42,734 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 14:28:42,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 76 [2021-08-06 14:28:42,740 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:42,740 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 63 treesize of output 54 [2021-08-06 14:28:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:42,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202785563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:42,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:42,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:28:42,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904891261] [2021-08-06 14:28:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:28:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:42,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:28:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:28:42,829 INFO L87 Difference]: Start difference. First operand 245 states and 644 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:44,504 INFO L93 Difference]: Finished difference Result 317 states and 769 transitions. [2021-08-06 14:28:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:28:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:28:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:44,505 INFO L225 Difference]: With dead ends: 317 [2021-08-06 14:28:44,505 INFO L226 Difference]: Without dead ends: 307 [2021-08-06 14:28:44,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1679.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:28:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-06 14:28:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 260. [2021-08-06 14:28:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.6447876447876446) internal successors, (685), 259 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 685 transitions. [2021-08-06 14:28:44,508 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 685 transitions. Word has length 16 [2021-08-06 14:28:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:44,508 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 685 transitions. [2021-08-06 14:28:44,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 685 transitions. [2021-08-06 14:28:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:44,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:44,509 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:44,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:44,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:44,709 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash 855908159, now seen corresponding path program 137 times [2021-08-06 14:28:44,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:44,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386998261] [2021-08-06 14:28:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:44,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:45,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:45,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386998261] [2021-08-06 14:28:45,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386998261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:45,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812012509] [2021-08-06 14:28:45,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:28:45,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:45,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:45,072 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:45,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 14:28:47,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:28:47,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:47,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:28:47,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:48,730 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:28:48,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 78 [2021-08-06 14:28:48,736 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:48,736 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 63 treesize of output 54 [2021-08-06 14:28:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:48,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812012509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:48,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:48,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:28:48,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303194281] [2021-08-06 14:28:48,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:28:48,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:48,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:28:48,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:28:48,821 INFO L87 Difference]: Start difference. First operand 260 states and 685 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:49,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:49,882 INFO L93 Difference]: Finished difference Result 329 states and 821 transitions. [2021-08-06 14:28:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:28:49,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:28:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:49,883 INFO L225 Difference]: With dead ends: 329 [2021-08-06 14:28:49,883 INFO L226 Difference]: Without dead ends: 322 [2021-08-06 14:28:49,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1200.6ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:28:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-06 14:28:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 268. [2021-08-06 14:28:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.689138576779026) internal successors, (718), 267 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 718 transitions. [2021-08-06 14:28:49,886 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 718 transitions. Word has length 16 [2021-08-06 14:28:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:49,886 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 718 transitions. [2021-08-06 14:28:49,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 718 transitions. [2021-08-06 14:28:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:49,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:49,887 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:49,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:50,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:50,097 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash 439588543, now seen corresponding path program 138 times [2021-08-06 14:28:50,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:50,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184713229] [2021-08-06 14:28:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:50,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:50,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184713229] [2021-08-06 14:28:50,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184713229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:50,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187050132] [2021-08-06 14:28:50,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:28:50,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:50,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:50,485 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:50,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 14:28:53,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:28:53,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:53,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:28:53,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:54,170 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:28:54,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 79 [2021-08-06 14:28:54,176 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:54,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2021-08-06 14:28:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:54,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187050132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:54,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:54,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:28:54,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167921944] [2021-08-06 14:28:54,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:54,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:54,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:54,255 INFO L87 Difference]: Start difference. First operand 268 states and 718 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:55,214 INFO L93 Difference]: Finished difference Result 332 states and 833 transitions. [2021-08-06 14:28:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:28:55,215 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:28:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:55,216 INFO L225 Difference]: With dead ends: 332 [2021-08-06 14:28:55,216 INFO L226 Difference]: Without dead ends: 329 [2021-08-06 14:28:55,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1027.6ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:28:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-08-06 14:28:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 269. [2021-08-06 14:28:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.6865671641791047) internal successors, (720), 268 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 720 transitions. [2021-08-06 14:28:55,219 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 720 transitions. Word has length 16 [2021-08-06 14:28:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 720 transitions. [2021-08-06 14:28:55,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 720 transitions. [2021-08-06 14:28:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:28:55,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:55,219 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:55,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:55,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:55,420 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:28:55,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash 827171553, now seen corresponding path program 139 times [2021-08-06 14:28:55,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:55,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334556830] [2021-08-06 14:28:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:55,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:55,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:55,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334556830] [2021-08-06 14:28:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334556830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:55,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124193053] [2021-08-06 14:28:55,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:28:55,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:55,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:55,798 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:55,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 14:28:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:58,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:28:58,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:59,517 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:28:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 77 [2021-08-06 14:28:59,523 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:59,523 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 62 treesize of output 53 [2021-08-06 14:28:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:59,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124193053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:59,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:59,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 14:28:59,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575620759] [2021-08-06 14:28:59,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:28:59,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:28:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:28:59,584 INFO L87 Difference]: Start difference. First operand 269 states and 720 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:29:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:00,144 INFO L93 Difference]: Finished difference Result 339 states and 846 transitions. [2021-08-06 14:29:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:29:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16 [2021-08-06 14:29:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:00,145 INFO L225 Difference]: With dead ends: 339 [2021-08-06 14:29:00,145 INFO L226 Difference]: Without dead ends: 336 [2021-08-06 14:29:00,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 697.5ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:29:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-08-06 14:29:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 274. [2021-08-06 14:29:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7032967032967035) internal successors, (738), 273 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 738 transitions. [2021-08-06 14:29:00,148 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 738 transitions. Word has length 16 [2021-08-06 14:29:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:00,148 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 738 transitions. [2021-08-06 14:29:00,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:29:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 738 transitions. [2021-08-06 14:29:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:00,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:00,149 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:00,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-06 14:29:00,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:00,357 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:00,357 INFO L82 PathProgramCache]: Analyzing trace with hash 834901951, now seen corresponding path program 140 times [2021-08-06 14:29:00,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:00,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667259228] [2021-08-06 14:29:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:00,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:00,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:00,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667259228] [2021-08-06 14:29:00,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667259228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:00,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329312198] [2021-08-06 14:29:00,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:29:00,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:00,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:00,778 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:00,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 14:29:03,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:29:03,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:03,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 14:29:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:04,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:04,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:04,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:04,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:04,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:04,556 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:04,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 98 [2021-08-06 14:29:04,563 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:04,563 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 81 treesize of output 68 [2021-08-06 14:29:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:04,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329312198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:04,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:04,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:29:04,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798594115] [2021-08-06 14:29:04,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:29:04,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:29:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:29:04,864 INFO L87 Difference]: Start difference. First operand 274 states and 738 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:05,731 INFO L93 Difference]: Finished difference Result 383 states and 951 transitions. [2021-08-06 14:29:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:29:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:05,732 INFO L225 Difference]: With dead ends: 383 [2021-08-06 14:29:05,732 INFO L226 Difference]: Without dead ends: 376 [2021-08-06 14:29:05,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1149.2ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:29:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-08-06 14:29:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 284. [2021-08-06 14:29:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.717314487632509) internal successors, (769), 283 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 769 transitions. [2021-08-06 14:29:05,736 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 769 transitions. Word has length 16 [2021-08-06 14:29:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:05,736 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 769 transitions. [2021-08-06 14:29:05,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 769 transitions. [2021-08-06 14:29:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:05,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:05,736 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:05,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-06 14:29:05,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:05,945 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash 418582335, now seen corresponding path program 141 times [2021-08-06 14:29:05,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:05,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380718633] [2021-08-06 14:29:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:05,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:06,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:06,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380718633] [2021-08-06 14:29:06,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380718633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:06,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378349562] [2021-08-06 14:29:06,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:29:06,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:06,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:06,308 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:06,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 14:29:09,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:29:09,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:09,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 14:29:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:10,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:10,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 14:29:10,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:29:10,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 89 [2021-08-06 14:29:10,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:29:10,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2021-08-06 14:29:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:10,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378349562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:10,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:10,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:29:10,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758407907] [2021-08-06 14:29:10,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:10,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:10,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:10,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:10,383 INFO L87 Difference]: Start difference. First operand 284 states and 769 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:11,213 INFO L93 Difference]: Finished difference Result 362 states and 914 transitions. [2021-08-06 14:29:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:29:11,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:11,214 INFO L225 Difference]: With dead ends: 362 [2021-08-06 14:29:11,214 INFO L226 Difference]: Without dead ends: 356 [2021-08-06 14:29:11,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1000.6ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:29:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-08-06 14:29:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 284. [2021-08-06 14:29:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.717314487632509) internal successors, (769), 283 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 769 transitions. [2021-08-06 14:29:11,218 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 769 transitions. Word has length 16 [2021-08-06 14:29:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:11,218 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 769 transitions. [2021-08-06 14:29:11,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 769 transitions. [2021-08-06 14:29:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:11,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:11,218 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:11,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:11,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:11,419 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:11,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1998264259, now seen corresponding path program 142 times [2021-08-06 14:29:11,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:11,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534041115] [2021-08-06 14:29:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:11,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:11,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:11,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534041115] [2021-08-06 14:29:11,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534041115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:11,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558170026] [2021-08-06 14:29:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:29:11,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:11,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:11,877 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:11,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 14:29:14,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:29:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:14,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:15,451 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 14:29:15,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 75 [2021-08-06 14:29:15,457 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:15,458 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 62 treesize of output 53 [2021-08-06 14:29:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:15,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558170026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:15,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:15,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:29:15,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012833773] [2021-08-06 14:29:15,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:15,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:15,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:15,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:15,532 INFO L87 Difference]: Start difference. First operand 284 states and 769 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:16,034 INFO L93 Difference]: Finished difference Result 321 states and 842 transitions. [2021-08-06 14:29:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:29:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:16,035 INFO L225 Difference]: With dead ends: 321 [2021-08-06 14:29:16,035 INFO L226 Difference]: Without dead ends: 312 [2021-08-06 14:29:16,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:29:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-06 14:29:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 290. [2021-08-06 14:29:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.7024221453287196) internal successors, (781), 289 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 781 transitions. [2021-08-06 14:29:16,038 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 781 transitions. Word has length 16 [2021-08-06 14:29:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:16,038 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 781 transitions. [2021-08-06 14:29:16,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 781 transitions. [2021-08-06 14:29:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:16,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:16,039 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:16,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:16,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 14:29:16,239 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:16,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:16,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1076884483, now seen corresponding path program 143 times [2021-08-06 14:29:16,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:16,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847174164] [2021-08-06 14:29:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:16,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:16,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:16,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847174164] [2021-08-06 14:29:16,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847174164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:16,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225778580] [2021-08-06 14:29:16,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:29:16,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:16,533 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:16,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 14:29:19,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:29:19,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:19,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:20,285 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 14:29:20,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 75 [2021-08-06 14:29:20,290 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:20,290 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 62 treesize of output 53 [2021-08-06 14:29:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:20,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225778580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:20,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:20,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 14:29:20,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717119024] [2021-08-06 14:29:20,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:29:20,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:29:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:29:20,343 INFO L87 Difference]: Start difference. First operand 290 states and 781 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:29:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:20,786 INFO L93 Difference]: Finished difference Result 364 states and 915 transitions. [2021-08-06 14:29:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:29:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16 [2021-08-06 14:29:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:20,787 INFO L225 Difference]: With dead ends: 364 [2021-08-06 14:29:20,787 INFO L226 Difference]: Without dead ends: 358 [2021-08-06 14:29:20,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:29:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-06 14:29:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 304. [2021-08-06 14:29:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.732673267326733) internal successors, (828), 303 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 828 transitions. [2021-08-06 14:29:20,791 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 828 transitions. Word has length 16 [2021-08-06 14:29:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:20,791 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 828 transitions. [2021-08-06 14:29:20,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:29:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 828 transitions. [2021-08-06 14:29:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:20,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:20,791 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:20,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:20,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-06 14:29:20,992 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1084614881, now seen corresponding path program 144 times [2021-08-06 14:29:20,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:20,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361135677] [2021-08-06 14:29:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:20,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:21,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:21,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361135677] [2021-08-06 14:29:21,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361135677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:21,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609232454] [2021-08-06 14:29:21,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:29:21,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:21,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:21,208 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:21,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 14:29:24,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:29:24,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:24,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:25,159 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:29:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 77 [2021-08-06 14:29:25,165 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:25,165 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 62 treesize of output 53 [2021-08-06 14:29:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:25,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609232454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:25,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:25,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:29:25,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730297669] [2021-08-06 14:29:25,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:29:25,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:29:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:29:25,231 INFO L87 Difference]: Start difference. First operand 304 states and 828 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:25,626 INFO L93 Difference]: Finished difference Result 440 states and 1135 transitions. [2021-08-06 14:29:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:29:25,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:25,628 INFO L225 Difference]: With dead ends: 440 [2021-08-06 14:29:25,628 INFO L226 Difference]: Without dead ends: 436 [2021-08-06 14:29:25,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:29:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-06 14:29:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 348. [2021-08-06 14:29:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.804034582132565) internal successors, (973), 347 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 973 transitions. [2021-08-06 14:29:25,632 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 973 transitions. Word has length 16 [2021-08-06 14:29:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:25,632 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 973 transitions. [2021-08-06 14:29:25,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 973 transitions. [2021-08-06 14:29:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:25,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:25,633 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:25,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:25,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 14:29:25,841 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1472197891, now seen corresponding path program 145 times [2021-08-06 14:29:25,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:25,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714785536] [2021-08-06 14:29:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:25,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:26,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:26,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714785536] [2021-08-06 14:29:26,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714785536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:26,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173305671] [2021-08-06 14:29:26,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:29:26,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:26,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:26,427 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:26,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 14:29:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:29,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:29,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:30,388 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 14:29:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 75 [2021-08-06 14:29:30,394 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:30,394 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 62 treesize of output 53 [2021-08-06 14:29:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:30,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173305671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:30,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:30,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:29:30,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929074076] [2021-08-06 14:29:30,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:30,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:30,476 INFO L87 Difference]: Start difference. First operand 348 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:31,078 INFO L93 Difference]: Finished difference Result 362 states and 999 transitions. [2021-08-06 14:29:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:29:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:31,079 INFO L225 Difference]: With dead ends: 362 [2021-08-06 14:29:31,079 INFO L226 Difference]: Without dead ends: 357 [2021-08-06 14:29:31,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 884.2ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:29:31,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-06 14:29:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 348. [2021-08-06 14:29:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.804034582132565) internal successors, (973), 347 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 973 transitions. [2021-08-06 14:29:31,083 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 973 transitions. Word has length 16 [2021-08-06 14:29:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:31,083 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 973 transitions. [2021-08-06 14:29:31,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 973 transitions. [2021-08-06 14:29:31,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:31,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:31,084 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:31,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:31,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 14:29:31,289 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash -425796323, now seen corresponding path program 146 times [2021-08-06 14:29:31,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:31,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417657030] [2021-08-06 14:29:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:31,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:31,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:31,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417657030] [2021-08-06 14:29:31,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417657030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:31,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984520171] [2021-08-06 14:29:31,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:29:31,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:31,665 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:31,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 14:29:34,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:29:34,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:34,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:34,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:35,687 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:29:35,687 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 100 treesize of output 83 [2021-08-06 14:29:35,691 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:35,691 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 66 treesize of output 57 [2021-08-06 14:29:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:35,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984520171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:35,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:35,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:29:35,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227714995] [2021-08-06 14:29:35,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:35,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:35,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:35,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:35,759 INFO L87 Difference]: Start difference. First operand 348 states and 973 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:36,520 INFO L93 Difference]: Finished difference Result 436 states and 1158 transitions. [2021-08-06 14:29:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:29:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:36,521 INFO L225 Difference]: With dead ends: 436 [2021-08-06 14:29:36,521 INFO L226 Difference]: Without dead ends: 433 [2021-08-06 14:29:36,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 839.9ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:29:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-06 14:29:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 356. [2021-08-06 14:29:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.8112676056338026) internal successors, (998), 355 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 998 transitions. [2021-08-06 14:29:36,525 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 998 transitions. Word has length 16 [2021-08-06 14:29:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:36,525 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 998 transitions. [2021-08-06 14:29:36,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 998 transitions. [2021-08-06 14:29:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:36,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:36,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:36,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 14:29:36,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:36,741 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:36,741 INFO L82 PathProgramCache]: Analyzing trace with hash 404685827, now seen corresponding path program 147 times [2021-08-06 14:29:36,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:36,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790192249] [2021-08-06 14:29:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:36,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:37,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:37,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790192249] [2021-08-06 14:29:37,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790192249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:37,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329272909] [2021-08-06 14:29:37,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:29:37,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:37,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:37,072 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:37,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 14:29:40,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:29:40,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:40,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:40,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:41,087 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:29:41,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 78 [2021-08-06 14:29:41,092 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:41,092 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 63 treesize of output 54 [2021-08-06 14:29:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:41,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329272909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:41,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:41,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 14:29:41,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375066382] [2021-08-06 14:29:41,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:29:41,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:29:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:29:41,136 INFO L87 Difference]: Start difference. First operand 356 states and 998 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:29:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:42,021 INFO L93 Difference]: Finished difference Result 440 states and 1174 transitions. [2021-08-06 14:29:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:29:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16 [2021-08-06 14:29:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:42,022 INFO L225 Difference]: With dead ends: 440 [2021-08-06 14:29:42,022 INFO L226 Difference]: Without dead ends: 437 [2021-08-06 14:29:42,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 947.9ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:29:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-06 14:29:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 370. [2021-08-06 14:29:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8292682926829267) internal successors, (1044), 369 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1044 transitions. [2021-08-06 14:29:42,026 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1044 transitions. Word has length 16 [2021-08-06 14:29:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:42,026 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1044 transitions. [2021-08-06 14:29:42,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:29:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1044 transitions. [2021-08-06 14:29:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:42,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:42,027 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:42,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:42,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-08-06 14:29:42,237 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:42,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1076988771, now seen corresponding path program 148 times [2021-08-06 14:29:42,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:42,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128800503] [2021-08-06 14:29:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:42,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:42,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:42,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128800503] [2021-08-06 14:29:42,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128800503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:42,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282388626] [2021-08-06 14:29:42,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:29:42,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:42,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:42,696 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:42,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 14:29:46,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:29:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:46,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:46,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:46,826 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:29:46,826 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 96 treesize of output 79 [2021-08-06 14:29:46,831 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:46,831 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 62 treesize of output 53 [2021-08-06 14:29:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:46,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282388626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:46,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:46,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:29:46,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171969604] [2021-08-06 14:29:46,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:29:46,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:29:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:29:46,914 INFO L87 Difference]: Start difference. First operand 370 states and 1044 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:47,813 INFO L93 Difference]: Finished difference Result 397 states and 1094 transitions. [2021-08-06 14:29:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:29:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:47,813 INFO L225 Difference]: With dead ends: 397 [2021-08-06 14:29:47,814 INFO L226 Difference]: Without dead ends: 393 [2021-08-06 14:29:47,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1112.8ms TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:29:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-08-06 14:29:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 370. [2021-08-06 14:29:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8265582655826558) internal successors, (1043), 369 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1043 transitions. [2021-08-06 14:29:47,818 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1043 transitions. Word has length 16 [2021-08-06 14:29:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:47,818 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1043 transitions. [2021-08-06 14:29:47,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1043 transitions. [2021-08-06 14:29:47,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:47,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:47,819 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:47,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:48,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:48,037 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:48,037 INFO L82 PathProgramCache]: Analyzing trace with hash -3903391, now seen corresponding path program 149 times [2021-08-06 14:29:48,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:48,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78412457] [2021-08-06 14:29:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:48,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:48,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:48,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78412457] [2021-08-06 14:29:48,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78412457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:48,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997036119] [2021-08-06 14:29:48,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:29:48,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:48,815 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:48,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 14:29:52,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:29:52,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:52,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:52,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:52,953 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:29:52,953 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 97 treesize of output 80 [2021-08-06 14:29:52,958 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:52,958 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 63 treesize of output 54 [2021-08-06 14:29:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:53,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997036119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:53,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:53,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:29:53,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121405450] [2021-08-06 14:29:53,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:29:53,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:29:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:29:53,054 INFO L87 Difference]: Start difference. First operand 370 states and 1043 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:53,934 INFO L93 Difference]: Finished difference Result 405 states and 1109 transitions. [2021-08-06 14:29:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:29:53,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:53,935 INFO L225 Difference]: With dead ends: 405 [2021-08-06 14:29:53,935 INFO L226 Difference]: Without dead ends: 402 [2021-08-06 14:29:53,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1096.9ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:29:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-06 14:29:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 370. [2021-08-06 14:29:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.8265582655826558) internal successors, (1043), 369 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1043 transitions. [2021-08-06 14:29:53,957 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1043 transitions. Word has length 16 [2021-08-06 14:29:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:53,957 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1043 transitions. [2021-08-06 14:29:53,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1043 transitions. [2021-08-06 14:29:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:53,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:53,958 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:53,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:54,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:54,171 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash 439009595, now seen corresponding path program 150 times [2021-08-06 14:29:54,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:54,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702176140] [2021-08-06 14:29:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:54,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:54,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:54,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702176140] [2021-08-06 14:29:54,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702176140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:54,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552858787] [2021-08-06 14:29:54,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:29:54,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:54,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:54,553 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:54,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 14:29:57,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:29:57,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:57,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:29:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:58,819 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:29:58,819 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 96 treesize of output 79 [2021-08-06 14:29:58,825 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:58,825 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 62 treesize of output 53 [2021-08-06 14:29:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:58,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552858787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:58,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:58,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:29:58,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960924547] [2021-08-06 14:29:58,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:58,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:58,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:58,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:58,901 INFO L87 Difference]: Start difference. First operand 370 states and 1043 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:59,724 INFO L93 Difference]: Finished difference Result 524 states and 1437 transitions. [2021-08-06 14:29:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:29:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:29:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:59,725 INFO L225 Difference]: With dead ends: 524 [2021-08-06 14:29:59,726 INFO L226 Difference]: Without dead ends: 521 [2021-08-06 14:29:59,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 867.0ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:29:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-06 14:29:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 372. [2021-08-06 14:29:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.8221024258760106) internal successors, (1047), 371 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1047 transitions. [2021-08-06 14:29:59,730 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1047 transitions. Word has length 16 [2021-08-06 14:29:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:59,730 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1047 transitions. [2021-08-06 14:29:59,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1047 transitions. [2021-08-06 14:29:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:29:59,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:59,731 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:59,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:59,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:59,945 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:29:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1213943779, now seen corresponding path program 151 times [2021-08-06 14:29:59,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:59,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642293702] [2021-08-06 14:29:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:59,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:00,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642293702] [2021-08-06 14:30:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642293702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:00,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27089522] [2021-08-06 14:30:00,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:30:00,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:00,345 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:00,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 14:30:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:03,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:03,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:04,815 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:30:04,815 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 96 treesize of output 79 [2021-08-06 14:30:04,821 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:04,821 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 62 treesize of output 53 [2021-08-06 14:30:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:04,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27089522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:04,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:04,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:30:04,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945520511] [2021-08-06 14:30:04,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:30:04,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:04,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:30:04,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:30:04,906 INFO L87 Difference]: Start difference. First operand 372 states and 1047 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:05,471 INFO L93 Difference]: Finished difference Result 422 states and 1157 transitions. [2021-08-06 14:30:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:30:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:30:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:05,472 INFO L225 Difference]: With dead ends: 422 [2021-08-06 14:30:05,472 INFO L226 Difference]: Without dead ends: 419 [2021-08-06 14:30:05,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:30:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-06 14:30:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 372. [2021-08-06 14:30:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.8221024258760106) internal successors, (1047), 371 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1047 transitions. [2021-08-06 14:30:05,490 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1047 transitions. Word has length 16 [2021-08-06 14:30:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:05,490 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1047 transitions. [2021-08-06 14:30:05,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1047 transitions. [2021-08-06 14:30:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:05,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:05,490 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:05,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:05,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:05,705 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1920001403, now seen corresponding path program 152 times [2021-08-06 14:30:05,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:05,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137363126] [2021-08-06 14:30:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:05,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:06,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:06,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137363126] [2021-08-06 14:30:06,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137363126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:06,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260785249] [2021-08-06 14:30:06,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:30:06,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:06,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:06,133 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:06,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 14:30:09,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:30:09,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:09,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:10,810 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:30:10,810 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 97 treesize of output 80 [2021-08-06 14:30:10,817 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:10,817 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 63 treesize of output 54 [2021-08-06 14:30:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:10,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260785249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:10,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:10,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:30:10,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010996928] [2021-08-06 14:30:10,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:30:10,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:30:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:30:10,897 INFO L87 Difference]: Start difference. First operand 372 states and 1047 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:12,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:12,202 INFO L93 Difference]: Finished difference Result 432 states and 1171 transitions. [2021-08-06 14:30:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:30:12,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:30:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:12,203 INFO L225 Difference]: With dead ends: 432 [2021-08-06 14:30:12,203 INFO L226 Difference]: Without dead ends: 425 [2021-08-06 14:30:12,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1419.1ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:30:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-08-06 14:30:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 377. [2021-08-06 14:30:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8191489361702127) internal successors, (1060), 376 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1060 transitions. [2021-08-06 14:30:12,207 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1060 transitions. Word has length 16 [2021-08-06 14:30:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:12,208 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1060 transitions. [2021-08-06 14:30:12,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1060 transitions. [2021-08-06 14:30:12,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:12,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:12,208 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:12,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:12,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:12,425 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:12,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2135323555, now seen corresponding path program 153 times [2021-08-06 14:30:12,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:12,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614594714] [2021-08-06 14:30:12,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:12,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:12,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:12,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614594714] [2021-08-06 14:30:12,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614594714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:12,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786679931] [2021-08-06 14:30:12,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:30:12,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:12,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:12,808 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:12,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 14:30:16,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:30:16,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:16,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:16,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:17,315 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:30:17,315 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 97 treesize of output 80 [2021-08-06 14:30:17,319 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:17,319 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 63 treesize of output 54 [2021-08-06 14:30:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786679931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:17,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:17,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:30:17,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611183626] [2021-08-06 14:30:17,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:30:17,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:30:17,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:30:17,390 INFO L87 Difference]: Start difference. First operand 377 states and 1060 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:18,913 INFO L93 Difference]: Finished difference Result 479 states and 1265 transitions. [2021-08-06 14:30:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:30:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:30:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:18,915 INFO L225 Difference]: With dead ends: 479 [2021-08-06 14:30:18,915 INFO L226 Difference]: Without dead ends: 473 [2021-08-06 14:30:18,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1508.2ms TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:30:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-08-06 14:30:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 387. [2021-08-06 14:30:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.826424870466321) internal successors, (1091), 386 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1091 transitions. [2021-08-06 14:30:18,920 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1091 transitions. Word has length 16 [2021-08-06 14:30:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:18,920 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1091 transitions. [2021-08-06 14:30:18,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1091 transitions. [2021-08-06 14:30:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:18,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:18,920 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:18,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:19,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-06 14:30:19,129 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2127593157, now seen corresponding path program 154 times [2021-08-06 14:30:19,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:19,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672627591] [2021-08-06 14:30:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:19,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:19,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:19,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672627591] [2021-08-06 14:30:19,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672627591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:19,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541582204] [2021-08-06 14:30:19,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:30:19,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:19,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:19,447 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:19,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 14:30:23,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:30:23,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:23,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:23,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:23,988 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:30:23,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 77 [2021-08-06 14:30:23,994 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:23,994 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 62 treesize of output 53 [2021-08-06 14:30:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:24,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541582204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:24,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:24,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:30:24,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662349406] [2021-08-06 14:30:24,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:30:24,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:30:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:30:24,074 INFO L87 Difference]: Start difference. First operand 387 states and 1091 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:25,430 INFO L93 Difference]: Finished difference Result 513 states and 1353 transitions. [2021-08-06 14:30:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:30:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:30:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:25,431 INFO L225 Difference]: With dead ends: 513 [2021-08-06 14:30:25,431 INFO L226 Difference]: Without dead ends: 506 [2021-08-06 14:30:25,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1329.1ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:30:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-06 14:30:25,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 399. [2021-08-06 14:30:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.851758793969849) internal successors, (1135), 398 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1135 transitions. [2021-08-06 14:30:25,437 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1135 transitions. Word has length 16 [2021-08-06 14:30:25,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:25,437 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1135 transitions. [2021-08-06 14:30:25,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1135 transitions. [2021-08-06 14:30:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:25,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:25,437 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:25,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:25,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:25,649 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash -328145499, now seen corresponding path program 155 times [2021-08-06 14:30:25,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:25,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374867454] [2021-08-06 14:30:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:25,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:26,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:26,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374867454] [2021-08-06 14:30:26,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374867454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:26,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697640618] [2021-08-06 14:30:26,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:30:26,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:26,045 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:26,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 14:30:29,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:30:29,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:29,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:30,600 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:30:30,600 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 96 treesize of output 79 [2021-08-06 14:30:30,605 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:30,606 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 62 treesize of output 53 [2021-08-06 14:30:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:30,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697640618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:30,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:30,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 14:30:30,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585565854] [2021-08-06 14:30:30,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:30,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:30,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:30,661 INFO L87 Difference]: Start difference. First operand 399 states and 1135 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:30:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:31,136 INFO L93 Difference]: Finished difference Result 437 states and 1214 transitions. [2021-08-06 14:30:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:30:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16 [2021-08-06 14:30:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:31,137 INFO L225 Difference]: With dead ends: 437 [2021-08-06 14:30:31,137 INFO L226 Difference]: Without dead ends: 434 [2021-08-06 14:30:31,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 605.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:30:31,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-06 14:30:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 399. [2021-08-06 14:30:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.851758793969849) internal successors, (1135), 398 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1135 transitions. [2021-08-06 14:30:31,143 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1135 transitions. Word has length 16 [2021-08-06 14:30:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:31,143 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1135 transitions. [2021-08-06 14:30:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:30:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1135 transitions. [2021-08-06 14:30:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:31,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:31,144 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:31,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:31,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:31,353 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1249525275, now seen corresponding path program 156 times [2021-08-06 14:30:31,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:31,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175777450] [2021-08-06 14:30:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:31,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:31,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:31,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175777450] [2021-08-06 14:30:31,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175777450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:31,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830166403] [2021-08-06 14:30:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:30:31,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:31,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:31,724 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:31,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 14:30:35,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:30:35,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:35,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:35,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:36,375 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:30:36,375 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 96 treesize of output 79 [2021-08-06 14:30:36,380 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:36,380 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 62 treesize of output 53 [2021-08-06 14:30:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:36,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830166403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:36,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:36,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 14:30:36,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365075235] [2021-08-06 14:30:36,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:36,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:36,430 INFO L87 Difference]: Start difference. First operand 399 states and 1135 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:30:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:37,064 INFO L93 Difference]: Finished difference Result 460 states and 1247 transitions. [2021-08-06 14:30:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:30:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16 [2021-08-06 14:30:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:37,065 INFO L225 Difference]: With dead ends: 460 [2021-08-06 14:30:37,065 INFO L226 Difference]: Without dead ends: 456 [2021-08-06 14:30:37,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 785.9ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:30:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-06 14:30:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 400. [2021-08-06 14:30:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.8521303258145365) internal successors, (1138), 399 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1138 transitions. [2021-08-06 14:30:37,070 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1138 transitions. Word has length 16 [2021-08-06 14:30:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:37,070 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1138 transitions. [2021-08-06 14:30:37,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:30:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1138 transitions. [2021-08-06 14:30:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:37,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:37,071 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:37,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:37,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-06 14:30:37,297 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:37,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1241794877, now seen corresponding path program 157 times [2021-08-06 14:30:37,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:37,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96122355] [2021-08-06 14:30:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:37,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:37,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:37,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96122355] [2021-08-06 14:30:37,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96122355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:37,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639016383] [2021-08-06 14:30:37,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:30:37,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:37,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:37,666 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:37,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 14:30:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:41,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:42,252 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:30:42,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 78 [2021-08-06 14:30:42,258 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:42,258 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 63 treesize of output 54 [2021-08-06 14:30:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:42,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639016383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:42,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:42,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:30:42,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828465167] [2021-08-06 14:30:42,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:30:42,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:42,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:30:42,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:30:42,349 INFO L87 Difference]: Start difference. First operand 400 states and 1138 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:43,414 INFO L93 Difference]: Finished difference Result 498 states and 1341 transitions. [2021-08-06 14:30:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:30:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:30:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:43,415 INFO L225 Difference]: With dead ends: 498 [2021-08-06 14:30:43,415 INFO L226 Difference]: Without dead ends: 495 [2021-08-06 14:30:43,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1082.5ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:30:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-06 14:30:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 403. [2021-08-06 14:30:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.8582089552238807) internal successors, (1149), 402 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1149 transitions. [2021-08-06 14:30:43,421 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1149 transitions. Word has length 16 [2021-08-06 14:30:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:43,421 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1149 transitions. [2021-08-06 14:30:43,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:43,421 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1149 transitions. [2021-08-06 14:30:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:43,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:43,421 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:43,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:43,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:43,633 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1711708095, now seen corresponding path program 158 times [2021-08-06 14:30:43,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:43,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767670997] [2021-08-06 14:30:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:43,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:44,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:44,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767670997] [2021-08-06 14:30:44,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767670997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:44,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453664947] [2021-08-06 14:30:44,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:30:44,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:44,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:44,044 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:44,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 14:30:48,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:30:48,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:48,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:49,012 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:30:49,012 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 97 treesize of output 80 [2021-08-06 14:30:49,017 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:49,018 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 63 treesize of output 54 [2021-08-06 14:30:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:49,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453664947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:49,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:49,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:30:49,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615877672] [2021-08-06 14:30:49,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:30:49,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:30:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:30:49,102 INFO L87 Difference]: Start difference. First operand 403 states and 1149 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:50,035 INFO L93 Difference]: Finished difference Result 461 states and 1250 transitions. [2021-08-06 14:30:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:30:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:30:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:50,036 INFO L225 Difference]: With dead ends: 461 [2021-08-06 14:30:50,036 INFO L226 Difference]: Without dead ends: 452 [2021-08-06 14:30:50,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:30:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-06 14:30:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 410. [2021-08-06 14:30:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.8508557457212715) internal successors, (1166), 409 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1166 transitions. [2021-08-06 14:30:50,041 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1166 transitions. Word has length 16 [2021-08-06 14:30:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:50,041 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1166 transitions. [2021-08-06 14:30:50,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1166 transitions. [2021-08-06 14:30:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:50,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:50,042 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:50,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:50,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-08-06 14:30:50,245 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:50,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:50,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1270531483, now seen corresponding path program 159 times [2021-08-06 14:30:50,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:50,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144593358] [2021-08-06 14:30:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:50,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:50,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:50,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144593358] [2021-08-06 14:30:50,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144593358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:50,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138448083] [2021-08-06 14:30:50,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:30:50,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:50,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:50,498 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:50,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-06 14:30:54,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:30:54,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:54,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:30:54,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:55,289 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:30:55,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 77 [2021-08-06 14:30:55,295 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:55,295 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 62 treesize of output 53 [2021-08-06 14:30:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:55,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138448083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:55,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:55,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 14:30:55,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848765545] [2021-08-06 14:30:55,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:30:55,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:30:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:30:55,361 INFO L87 Difference]: Start difference. First operand 410 states and 1166 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-08-06 14:30:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:56,065 INFO L93 Difference]: Finished difference Result 505 states and 1355 transitions. [2021-08-06 14:30:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:30:56,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 16 [2021-08-06 14:30:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:56,066 INFO L225 Difference]: With dead ends: 505 [2021-08-06 14:30:56,066 INFO L226 Difference]: Without dead ends: 499 [2021-08-06 14:30:56,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 765.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:30:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-08-06 14:30:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 399. [2021-08-06 14:30:56,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.829145728643216) internal successors, (1126), 398 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1126 transitions. [2021-08-06 14:30:56,072 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1126 transitions. Word has length 16 [2021-08-06 14:30:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:56,073 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1126 transitions. [2021-08-06 14:30:56,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-08-06 14:30:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1126 transitions. [2021-08-06 14:30:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:30:56,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:56,073 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:56,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:56,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:56,274 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:30:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1542761215, now seen corresponding path program 160 times [2021-08-06 14:30:56,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:56,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752273011] [2021-08-06 14:30:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:56,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:56,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:56,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752273011] [2021-08-06 14:30:56,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752273011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:56,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065142274] [2021-08-06 14:30:56,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:30:56,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:56,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:56,645 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:56,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-06 14:31:00,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:31:00,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:00,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:31:00,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:01,354 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 14:31:01,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 75 [2021-08-06 14:31:01,364 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:01,364 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 62 treesize of output 53 [2021-08-06 14:31:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:01,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065142274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:01,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:01,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 14:31:01,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195017236] [2021-08-06 14:31:01,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:01,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:01,437 INFO L87 Difference]: Start difference. First operand 399 states and 1126 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:02,526 INFO L93 Difference]: Finished difference Result 550 states and 1465 transitions. [2021-08-06 14:31:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:31:02,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:31:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:02,527 INFO L225 Difference]: With dead ends: 550 [2021-08-06 14:31:02,527 INFO L226 Difference]: Without dead ends: 547 [2021-08-06 14:31:02,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1115.9ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:31:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-08-06 14:31:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 435. [2021-08-06 14:31:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8847926267281108) internal successors, (1252), 434 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1252 transitions. [2021-08-06 14:31:02,533 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1252 transitions. Word has length 16 [2021-08-06 14:31:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:02,533 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1252 transitions. [2021-08-06 14:31:02,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1252 transitions. [2021-08-06 14:31:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:31:02,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:02,534 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:02,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-08-06 14:31:02,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:02,735 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:02,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:02,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1361797405, now seen corresponding path program 161 times [2021-08-06 14:31:02,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:02,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283007988] [2021-08-06 14:31:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:02,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:03,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:03,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283007988] [2021-08-06 14:31:03,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283007988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:03,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574493223] [2021-08-06 14:31:03,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:31:03,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:03,250 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:03,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-06 14:31:06,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:31:06,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:06,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:31:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:07,645 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:31:07,646 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 96 treesize of output 79 [2021-08-06 14:31:07,651 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:07,651 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 62 treesize of output 53 [2021-08-06 14:31:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:07,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574493223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:07,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:07,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 14:31:07,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746218492] [2021-08-06 14:31:07,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:31:07,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:31:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:31:07,727 INFO L87 Difference]: Start difference. First operand 435 states and 1252 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:08,148 INFO L93 Difference]: Finished difference Result 473 states and 1327 transitions. [2021-08-06 14:31:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:31:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:31:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:08,149 INFO L225 Difference]: With dead ends: 473 [2021-08-06 14:31:08,149 INFO L226 Difference]: Without dead ends: 464 [2021-08-06 14:31:08,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 650.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:31:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-06 14:31:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 436. [2021-08-06 14:31:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.882758620689655) internal successors, (1254), 435 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1254 transitions. [2021-08-06 14:31:08,154 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1254 transitions. Word has length 16 [2021-08-06 14:31:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:08,154 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1254 transitions. [2021-08-06 14:31:08,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1254 transitions. [2021-08-06 14:31:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:31:08,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:08,154 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:08,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:08,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:08,365 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash 440417629, now seen corresponding path program 162 times [2021-08-06 14:31:08,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:08,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075865378] [2021-08-06 14:31:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:08,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:08,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:08,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075865378] [2021-08-06 14:31:08,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075865378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:08,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009048748] [2021-08-06 14:31:08,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:31:08,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:08,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:08,558 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:08,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-06 14:31:12,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:31:12,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:12,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:31:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:13,304 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:31:13,304 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 96 treesize of output 79 [2021-08-06 14:31:13,308 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:13,308 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 62 treesize of output 53 [2021-08-06 14:31:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:13,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009048748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:13,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:13,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 14:31:13,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058695749] [2021-08-06 14:31:13,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:13,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:13,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:13,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:13,356 INFO L87 Difference]: Start difference. First operand 436 states and 1254 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:31:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:13,613 INFO L93 Difference]: Finished difference Result 516 states and 1400 transitions. [2021-08-06 14:31:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:31:13,614 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16 [2021-08-06 14:31:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:13,614 INFO L225 Difference]: With dead ends: 516 [2021-08-06 14:31:13,614 INFO L226 Difference]: Without dead ends: 510 [2021-08-06 14:31:13,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-06 14:31:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 432. [2021-08-06 14:31:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.8839907192575405) internal successors, (1243), 431 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1243 transitions. [2021-08-06 14:31:13,619 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1243 transitions. Word has length 16 [2021-08-06 14:31:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:13,620 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1243 transitions. [2021-08-06 14:31:13,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:31:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1243 transitions. [2021-08-06 14:31:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:31:13,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:13,620 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:13,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-06 14:31:13,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:13,837 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash -450417157, now seen corresponding path program 163 times [2021-08-06 14:31:13,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:13,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251808693] [2021-08-06 14:31:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:13,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:14,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:14,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251808693] [2021-08-06 14:31:14,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251808693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:14,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560537741] [2021-08-06 14:31:14,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:31:14,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:14,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:14,164 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:14,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-06 14:31:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:18,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:31:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:19,106 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 14:31:19,107 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 96 treesize of output 79 [2021-08-06 14:31:19,112 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:19,112 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 62 treesize of output 53 [2021-08-06 14:31:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:19,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560537741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:19,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:19,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 14:31:19,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936755532] [2021-08-06 14:31:19,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:19,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:19,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:19,164 INFO L87 Difference]: Start difference. First operand 432 states and 1243 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:31:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:19,586 INFO L93 Difference]: Finished difference Result 553 states and 1509 transitions. [2021-08-06 14:31:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:31:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16 [2021-08-06 14:31:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:19,588 INFO L225 Difference]: With dead ends: 553 [2021-08-06 14:31:19,588 INFO L226 Difference]: Without dead ends: 548 [2021-08-06 14:31:19,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:31:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-08-06 14:31:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 470. [2021-08-06 14:31:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.925373134328358) internal successors, (1372), 469 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1372 transitions. [2021-08-06 14:31:19,593 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1372 transitions. Word has length 16 [2021-08-06 14:31:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:19,594 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1372 transitions. [2021-08-06 14:31:19,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:31:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1372 transitions. [2021-08-06 14:31:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:31:19,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:19,594 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:19,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:19,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-08-06 14:31:19,805 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:19,805 INFO L82 PathProgramCache]: Analyzing trace with hash -231781027, now seen corresponding path program 164 times [2021-08-06 14:31:19,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:19,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333310403] [2021-08-06 14:31:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:19,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:20,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:20,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333310403] [2021-08-06 14:31:20,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333310403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:20,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367606998] [2021-08-06 14:31:20,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:31:20,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:20,157 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:20,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-06 14:31:24,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:31:24,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:24,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:31:24,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:25,110 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-06 14:31:25,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 77 [2021-08-06 14:31:25,115 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:25,115 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 62 treesize of output 53 [2021-08-06 14:31:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:25,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367606998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:25,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:25,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 14:31:25,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902633783] [2021-08-06 14:31:25,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:25,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:25,173 INFO L87 Difference]: Start difference. First operand 470 states and 1372 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:31:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:25,939 INFO L93 Difference]: Finished difference Result 547 states and 1526 transitions. [2021-08-06 14:31:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:31:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 16 [2021-08-06 14:31:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:25,940 INFO L225 Difference]: With dead ends: 547 [2021-08-06 14:31:25,940 INFO L226 Difference]: Without dead ends: 544 [2021-08-06 14:31:25,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:31:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-06 14:31:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 483. [2021-08-06 14:31:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.9398340248962658) internal successors, (1417), 482 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1417 transitions. [2021-08-06 14:31:25,946 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1417 transitions. Word has length 16 [2021-08-06 14:31:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:25,946 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1417 transitions. [2021-08-06 14:31:25,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:31:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1417 transitions. [2021-08-06 14:31:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:31:25,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:25,947 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:25,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-06 14:31:26,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:26,166 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:26,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1713455625, now seen corresponding path program 165 times [2021-08-06 14:31:26,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:26,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114191216] [2021-08-06 14:31:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:26,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:26,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:26,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114191216] [2021-08-06 14:31:26,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114191216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:26,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805561399] [2021-08-06 14:31:26,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:31:26,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:26,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:26,705 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:26,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-06 14:31:30,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:31:30,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:30,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:31:30,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:31,640 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 14:31:31,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 76 [2021-08-06 14:31:31,645 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:31,646 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 63 treesize of output 54 [2021-08-06 14:31:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:31,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805561399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:31,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:31,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:31:31,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040572343] [2021-08-06 14:31:31,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:31:31,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:31:31,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:31:31,740 INFO L87 Difference]: Start difference. First operand 483 states and 1417 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:32,690 INFO L93 Difference]: Finished difference Result 512 states and 1471 transitions. [2021-08-06 14:31:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:31:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:31:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:32,691 INFO L225 Difference]: With dead ends: 512 [2021-08-06 14:31:32,691 INFO L226 Difference]: Without dead ends: 508 [2021-08-06 14:31:32,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1191.4ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:31:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-08-06 14:31:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 483. [2021-08-06 14:31:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.9377593360995853) internal successors, (1416), 482 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1416 transitions. [2021-08-06 14:31:32,697 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1416 transitions. Word has length 16 [2021-08-06 14:31:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:32,697 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1416 transitions. [2021-08-06 14:31:32,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1416 transitions. [2021-08-06 14:31:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:31:32,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:32,697 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:32,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:32,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-06 14:31:32,908 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash -640370245, now seen corresponding path program 166 times [2021-08-06 14:31:32,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:32,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773763292] [2021-08-06 14:31:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:32,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:33,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:33,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773763292] [2021-08-06 14:31:33,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773763292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:33,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682338395] [2021-08-06 14:31:33,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:31:33,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:33,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:33,613 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:33,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-06 14:31:37,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:31:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:37,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 14:31:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:38,481 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 14:31:38,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 75 [2021-08-06 14:31:38,487 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:38,487 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 62 treesize of output 53 [2021-08-06 14:31:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:38,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682338395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:38,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:38,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 14:31:38,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818038249] [2021-08-06 14:31:38,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:31:38,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:38,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:31:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:31:38,565 INFO L87 Difference]: Start difference. First operand 483 states and 1416 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:39,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:39,517 INFO L93 Difference]: Finished difference Result 520 states and 1486 transitions. [2021-08-06 14:31:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:31:39,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:31:39,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:39,519 INFO L225 Difference]: With dead ends: 520 [2021-08-06 14:31:39,519 INFO L226 Difference]: Without dead ends: 517 [2021-08-06 14:31:39,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1126.0ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:31:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-06 14:31:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 483. [2021-08-06 14:31:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.9377593360995853) internal successors, (1416), 482 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1416 transitions. [2021-08-06 14:31:39,524 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1416 transitions. Word has length 16 [2021-08-06 14:31:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:39,524 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1416 transitions. [2021-08-06 14:31:39,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1416 transitions. [2021-08-06 14:31:39,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:39,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:39,525 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:39,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:39,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-06 14:31:39,740 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:39,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2002561587, now seen corresponding path program 167 times [2021-08-06 14:31:39,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:39,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448393131] [2021-08-06 14:31:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:39,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:39,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:39,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448393131] [2021-08-06 14:31:39,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448393131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:39,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268862371] [2021-08-06 14:31:39,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:31:39,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:39,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:39,883 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:39,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-06 14:31:44,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:31:44,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:31:44,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:44,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:31:44,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:31:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:44,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268862371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:44,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:44,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:31:44,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949135868] [2021-08-06 14:31:44,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:44,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:44,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:44,496 INFO L87 Difference]: Start difference. First operand 483 states and 1416 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-08-06 14:31:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:44,870 INFO L93 Difference]: Finished difference Result 634 states and 1807 transitions. [2021-08-06 14:31:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:31:44,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 17 [2021-08-06 14:31:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:44,872 INFO L225 Difference]: With dead ends: 634 [2021-08-06 14:31:44,872 INFO L226 Difference]: Without dead ends: 623 [2021-08-06 14:31:44,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:31:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-08-06 14:31:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 480. [2021-08-06 14:31:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.943632567849687) internal successors, (1410), 479 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1410 transitions. [2021-08-06 14:31:44,878 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1410 transitions. Word has length 17 [2021-08-06 14:31:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:44,878 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1410 transitions. [2021-08-06 14:31:44,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-08-06 14:31:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1410 transitions. [2021-08-06 14:31:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:44,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:44,879 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:44,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:45,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-08-06 14:31:45,089 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash 464142085, now seen corresponding path program 168 times [2021-08-06 14:31:45,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:45,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130319520] [2021-08-06 14:31:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:45,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:45,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:45,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130319520] [2021-08-06 14:31:45,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130319520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:45,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392555849] [2021-08-06 14:31:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:31:45,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:45,219 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:45,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-06 14:31:49,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:31:49,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:49,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:31:49,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:49,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:31:49,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:31:49,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:31:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:49,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392555849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:49,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:49,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:31:49,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522519348] [2021-08-06 14:31:49,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:49,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:49,734 INFO L87 Difference]: Start difference. First operand 480 states and 1410 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-08-06 14:31:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:49,943 INFO L93 Difference]: Finished difference Result 635 states and 1815 transitions. [2021-08-06 14:31:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:31:49,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 17 [2021-08-06 14:31:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:49,945 INFO L225 Difference]: With dead ends: 635 [2021-08-06 14:31:49,945 INFO L226 Difference]: Without dead ends: 635 [2021-08-06 14:31:49,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:31:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-06 14:31:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 481. [2021-08-06 14:31:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.94375) internal successors, (1413), 480 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1413 transitions. [2021-08-06 14:31:49,951 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1413 transitions. Word has length 17 [2021-08-06 14:31:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:49,951 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1413 transitions. [2021-08-06 14:31:49,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-08-06 14:31:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1413 transitions. [2021-08-06 14:31:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:49,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:49,952 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:49,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:50,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:50,173 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2101260275, now seen corresponding path program 169 times [2021-08-06 14:31:50,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:50,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791943367] [2021-08-06 14:31:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:50,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:50,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:50,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791943367] [2021-08-06 14:31:50,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791943367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:50,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844579721] [2021-08-06 14:31:50,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:31:50,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:50,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:50,333 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:50,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-06 14:31:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:53,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:31:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:54,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:31:54,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:31:54,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:31:54,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:31:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:54,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844579721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:54,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:54,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:31:54,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736041404] [2021-08-06 14:31:54,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:54,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:54,296 INFO L87 Difference]: Start difference. First operand 481 states and 1413 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:54,641 INFO L93 Difference]: Finished difference Result 683 states and 1896 transitions. [2021-08-06 14:31:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:31:54,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:31:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:54,642 INFO L225 Difference]: With dead ends: 683 [2021-08-06 14:31:54,642 INFO L226 Difference]: Without dead ends: 683 [2021-08-06 14:31:54,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:31:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-08-06 14:31:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 488. [2021-08-06 14:31:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.948665297741273) internal successors, (1436), 487 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1436 transitions. [2021-08-06 14:31:54,650 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1436 transitions. Word has length 17 [2021-08-06 14:31:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:54,650 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1436 transitions. [2021-08-06 14:31:54,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1436 transitions. [2021-08-06 14:31:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:54,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:54,651 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:54,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:54,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:54,852 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:31:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1392090793, now seen corresponding path program 170 times [2021-08-06 14:31:54,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:54,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802320646] [2021-08-06 14:31:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:54,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:55,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:55,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802320646] [2021-08-06 14:31:55,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802320646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:55,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511506840] [2021-08-06 14:31:55,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:31:55,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:55,015 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:55,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-06 14:31:59,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:31:59,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:59,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:31:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:59,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:31:59,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:31:59,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:31:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:31:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:59,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511506840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:59,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:59,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:31:59,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747729386] [2021-08-06 14:31:59,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:59,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:59,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:59,744 INFO L87 Difference]: Start difference. First operand 488 states and 1436 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:00,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:00,549 INFO L93 Difference]: Finished difference Result 717 states and 1956 transitions. [2021-08-06 14:32:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:32:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:00,551 INFO L225 Difference]: With dead ends: 717 [2021-08-06 14:32:00,551 INFO L226 Difference]: Without dead ends: 708 [2021-08-06 14:32:00,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 696.7ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:32:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-08-06 14:32:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 497. [2021-08-06 14:32:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.9556451612903225) internal successors, (1466), 496 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1466 transitions. [2021-08-06 14:32:00,557 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1466 transitions. Word has length 17 [2021-08-06 14:32:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:00,557 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1466 transitions. [2021-08-06 14:32:00,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1466 transitions. [2021-08-06 14:32:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:00,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:00,558 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:00,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:00,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-06 14:32:00,759 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:00,759 INFO L82 PathProgramCache]: Analyzing trace with hash 326252913, now seen corresponding path program 171 times [2021-08-06 14:32:00,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:00,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343523126] [2021-08-06 14:32:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:00,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:00,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:00,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343523126] [2021-08-06 14:32:00,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343523126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:00,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846335943] [2021-08-06 14:32:00,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:00,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:00,929 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:00,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-06 14:32:05,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:32:05,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:05,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:05,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:05,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:32:05,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:05,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:32:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:05,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846335943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:05,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:05,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:05,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918170786] [2021-08-06 14:32:05,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:05,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:05,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:05,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:05,503 INFO L87 Difference]: Start difference. First operand 497 states and 1466 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:06,063 INFO L93 Difference]: Finished difference Result 696 states and 1929 transitions. [2021-08-06 14:32:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:32:06,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:06,064 INFO L225 Difference]: With dead ends: 696 [2021-08-06 14:32:06,064 INFO L226 Difference]: Without dead ends: 696 [2021-08-06 14:32:06,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:32:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-08-06 14:32:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 495. [2021-08-06 14:32:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.9473684210526314) internal successors, (1456), 494 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1456 transitions. [2021-08-06 14:32:06,074 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1456 transitions. Word has length 17 [2021-08-06 14:32:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:06,074 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1456 transitions. [2021-08-06 14:32:06,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1456 transitions. [2021-08-06 14:32:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:06,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:06,075 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:06,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2021-08-06 14:32:06,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:06,295 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:06,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1384360395, now seen corresponding path program 172 times [2021-08-06 14:32:06,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:06,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237280758] [2021-08-06 14:32:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:06,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:06,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:06,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237280758] [2021-08-06 14:32:06,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237280758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:06,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213051911] [2021-08-06 14:32:06,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:32:06,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:06,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:06,448 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:06,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-06 14:32:10,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:32:10,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:10,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:10,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:11,169 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:11,170 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 41 treesize of output 38 [2021-08-06 14:32:11,175 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:11,175 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 34 treesize of output 29 [2021-08-06 14:32:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:11,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213051911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:11,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:11,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:11,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363287999] [2021-08-06 14:32:11,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:11,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:11,221 INFO L87 Difference]: Start difference. First operand 495 states and 1456 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:11,746 INFO L93 Difference]: Finished difference Result 750 states and 2041 transitions. [2021-08-06 14:32:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:32:11,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:11,748 INFO L225 Difference]: With dead ends: 750 [2021-08-06 14:32:11,748 INFO L226 Difference]: Without dead ends: 750 [2021-08-06 14:32:11,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 492.2ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:32:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-08-06 14:32:11,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 507. [2021-08-06 14:32:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.958498023715415) internal successors, (1497), 506 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1497 transitions. [2021-08-06 14:32:11,755 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1497 transitions. Word has length 17 [2021-08-06 14:32:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:11,755 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1497 transitions. [2021-08-06 14:32:11,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1497 transitions. [2021-08-06 14:32:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:11,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:11,756 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:11,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-06 14:32:11,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:11,956 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:11,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1421201905, now seen corresponding path program 173 times [2021-08-06 14:32:11,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:11,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26580684] [2021-08-06 14:32:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:11,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:12,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:12,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26580684] [2021-08-06 14:32:12,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26580684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:12,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247337482] [2021-08-06 14:32:12,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:32:12,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:12,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:12,108 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:12,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-06 14:32:16,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:32:16,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:16,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:16,804 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:16,804 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 41 treesize of output 38 [2021-08-06 14:32:16,809 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:16,809 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 34 treesize of output 29 [2021-08-06 14:32:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:16,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247337482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:16,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:16,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:16,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2370709] [2021-08-06 14:32:16,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:16,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:16,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:16,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:16,853 INFO L87 Difference]: Start difference. First operand 507 states and 1497 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:17,359 INFO L93 Difference]: Finished difference Result 707 states and 1994 transitions. [2021-08-06 14:32:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:32:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:17,360 INFO L225 Difference]: With dead ends: 707 [2021-08-06 14:32:17,360 INFO L226 Difference]: Without dead ends: 707 [2021-08-06 14:32:17,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:32:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-06 14:32:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 508. [2021-08-06 14:32:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.9566074950690333) internal successors, (1499), 507 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1499 transitions. [2021-08-06 14:32:17,367 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1499 transitions. Word has length 17 [2021-08-06 14:32:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:17,367 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1499 transitions. [2021-08-06 14:32:17,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1499 transitions. [2021-08-06 14:32:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:17,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:17,368 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:17,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:17,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:17,593 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:17,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1800680011, now seen corresponding path program 174 times [2021-08-06 14:32:17,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:17,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219373572] [2021-08-06 14:32:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:17,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:17,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:17,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219373572] [2021-08-06 14:32:17,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219373572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:17,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259607099] [2021-08-06 14:32:17,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:32:17,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:17,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:17,790 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:17,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-06 14:32:22,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:32:22,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:22,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:22,630 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:22,630 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 41 treesize of output 38 [2021-08-06 14:32:22,635 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:22,635 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 34 treesize of output 29 [2021-08-06 14:32:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:22,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259607099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:22,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:22,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:22,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002253839] [2021-08-06 14:32:22,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:22,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:22,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:22,678 INFO L87 Difference]: Start difference. First operand 508 states and 1499 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:22,852 INFO L93 Difference]: Finished difference Result 663 states and 1904 transitions. [2021-08-06 14:32:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:32:22,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:22,853 INFO L225 Difference]: With dead ends: 663 [2021-08-06 14:32:22,853 INFO L226 Difference]: Without dead ends: 663 [2021-08-06 14:32:22,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-06 14:32:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 508. [2021-08-06 14:32:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.9566074950690333) internal successors, (1499), 507 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1499 transitions. [2021-08-06 14:32:22,860 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1499 transitions. Word has length 17 [2021-08-06 14:32:22,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:22,860 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1499 transitions. [2021-08-06 14:32:22,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:22,860 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1499 transitions. [2021-08-06 14:32:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:22,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:22,861 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:22,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:23,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:23,077 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:23,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1235007863, now seen corresponding path program 175 times [2021-08-06 14:32:23,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:23,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892882682] [2021-08-06 14:32:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:23,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:23,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:23,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892882682] [2021-08-06 14:32:23,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892882682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:23,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261609812] [2021-08-06 14:32:23,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:23,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:23,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:23,221 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:23,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-06 14:32:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:27,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:27,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:32:27,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:27,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:32:27,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:27,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:32:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:28,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261609812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:28,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:28,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:28,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176251499] [2021-08-06 14:32:28,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:28,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:28,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:28,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:28,025 INFO L87 Difference]: Start difference. First operand 508 states and 1499 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:28,346 INFO L93 Difference]: Finished difference Result 700 states and 1921 transitions. [2021-08-06 14:32:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:32:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:32:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:28,347 INFO L225 Difference]: With dead ends: 700 [2021-08-06 14:32:28,347 INFO L226 Difference]: Without dead ends: 700 [2021-08-06 14:32:28,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:32:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-08-06 14:32:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 553. [2021-08-06 14:32:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.994565217391304) internal successors, (1653), 552 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1653 transitions. [2021-08-06 14:32:28,354 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1653 transitions. Word has length 17 [2021-08-06 14:32:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:28,354 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1653 transitions. [2021-08-06 14:32:28,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1653 transitions. [2021-08-06 14:32:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:28,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:28,355 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:28,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:28,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-06 14:32:28,577 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:28,577 INFO L82 PathProgramCache]: Analyzing trace with hash 315307155, now seen corresponding path program 176 times [2021-08-06 14:32:28,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:28,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639651807] [2021-08-06 14:32:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:28,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:28,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:28,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639651807] [2021-08-06 14:32:28,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639651807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:28,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570339757] [2021-08-06 14:32:28,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:32:28,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:28,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:28,711 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:28,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-06 14:32:33,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:32:33,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:33,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:33,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:33,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:33,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:32:33,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:33,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:32:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:33,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570339757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:33,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:33,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:33,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358021202] [2021-08-06 14:32:33,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:33,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:33,548 INFO L87 Difference]: Start difference. First operand 553 states and 1653 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:33,894 INFO L93 Difference]: Finished difference Result 649 states and 1813 transitions. [2021-08-06 14:32:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:32:33,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:33,895 INFO L225 Difference]: With dead ends: 649 [2021-08-06 14:32:33,895 INFO L226 Difference]: Without dead ends: 645 [2021-08-06 14:32:33,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:32:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-08-06 14:32:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 554. [2021-08-06 14:32:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.9783001808318263) internal successors, (1647), 553 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1647 transitions. [2021-08-06 14:32:33,901 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1647 transitions. Word has length 17 [2021-08-06 14:32:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:33,901 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1647 transitions. [2021-08-06 14:32:33,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1647 transitions. [2021-08-06 14:32:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:33,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:33,902 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:33,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-06 14:32:34,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-06 14:32:34,104 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1242738261, now seen corresponding path program 177 times [2021-08-06 14:32:34,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:34,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885825647] [2021-08-06 14:32:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:34,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:34,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:34,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885825647] [2021-08-06 14:32:34,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885825647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:34,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641624766] [2021-08-06 14:32:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:34,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:34,269 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:34,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-06 14:32:38,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:32:38,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:38,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:38,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:38,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:32:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:38,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:32:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:39,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641624766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:39,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:39,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:39,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856328696] [2021-08-06 14:32:39,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:39,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:39,006 INFO L87 Difference]: Start difference. First operand 554 states and 1647 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:39,474 INFO L93 Difference]: Finished difference Result 717 states and 1945 transitions. [2021-08-06 14:32:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:32:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:32:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:39,475 INFO L225 Difference]: With dead ends: 717 [2021-08-06 14:32:39,475 INFO L226 Difference]: Without dead ends: 716 [2021-08-06 14:32:39,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:32:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-06 14:32:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 561. [2021-08-06 14:32:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.9910714285714284) internal successors, (1675), 560 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1675 transitions. [2021-08-06 14:32:39,482 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1675 transitions. Word has length 17 [2021-08-06 14:32:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:39,482 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1675 transitions. [2021-08-06 14:32:39,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1675 transitions. [2021-08-06 14:32:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:39,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:39,484 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:39,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:39,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-06 14:32:39,709 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354489, now seen corresponding path program 178 times [2021-08-06 14:32:39,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:39,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831676838] [2021-08-06 14:32:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:39,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:39,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:39,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831676838] [2021-08-06 14:32:39,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831676838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:39,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541484997] [2021-08-06 14:32:39,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:32:39,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:39,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:39,902 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:39,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-06 14:32:44,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:32:44,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:44,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:44,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:44,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:32:44,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:44,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:32:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:44,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541484997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:44,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:44,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:44,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173938389] [2021-08-06 14:32:44,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:44,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:44,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:44,742 INFO L87 Difference]: Start difference. First operand 561 states and 1675 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:45,429 INFO L93 Difference]: Finished difference Result 718 states and 1952 transitions. [2021-08-06 14:32:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:32:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:45,431 INFO L225 Difference]: With dead ends: 718 [2021-08-06 14:32:45,431 INFO L226 Difference]: Without dead ends: 714 [2021-08-06 14:32:45,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:32:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-08-06 14:32:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 569. [2021-08-06 14:32:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.9806338028169015) internal successors, (1693), 568 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1693 transitions. [2021-08-06 14:32:45,439 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1693 transitions. Word has length 17 [2021-08-06 14:32:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:45,439 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1693 transitions. [2021-08-06 14:32:45,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1693 transitions. [2021-08-06 14:32:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:45,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:45,440 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:45,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-06 14:32:45,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:45,641 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:45,641 INFO L82 PathProgramCache]: Analyzing trace with hash -532269101, now seen corresponding path program 179 times [2021-08-06 14:32:45,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:45,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845272560] [2021-08-06 14:32:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:45,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:45,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:45,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845272560] [2021-08-06 14:32:45,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845272560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:45,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64678521] [2021-08-06 14:32:45,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:32:45,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:45,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:45,830 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:45,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-06 14:32:50,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:32:50,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:50,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:50,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:50,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:50,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:32:50,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:50,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:32:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:50,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64678521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:50,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:50,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:50,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908681529] [2021-08-06 14:32:50,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:50,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:50,477 INFO L87 Difference]: Start difference. First operand 569 states and 1693 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:50,973 INFO L93 Difference]: Finished difference Result 701 states and 1918 transitions. [2021-08-06 14:32:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:32:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:50,974 INFO L225 Difference]: With dead ends: 701 [2021-08-06 14:32:50,974 INFO L226 Difference]: Without dead ends: 701 [2021-08-06 14:32:50,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:32:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-08-06 14:32:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 554. [2021-08-06 14:32:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.965641952983725) internal successors, (1640), 553 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1640 transitions. [2021-08-06 14:32:50,980 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1640 transitions. Word has length 17 [2021-08-06 14:32:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:50,981 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1640 transitions. [2021-08-06 14:32:50,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1640 transitions. [2021-08-06 14:32:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:50,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:50,981 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:51,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:51,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:51,201 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:51,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:51,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1360854451, now seen corresponding path program 180 times [2021-08-06 14:32:51,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:51,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556312926] [2021-08-06 14:32:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:51,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:51,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:51,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556312926] [2021-08-06 14:32:51,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556312926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:51,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615421730] [2021-08-06 14:32:51,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:32:51,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:51,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:51,310 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:51,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-06 14:32:55,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:32:55,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:32:55,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:56,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:56,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:32:56,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:32:56,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:32:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:56,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615421730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:56,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:56,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:56,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836660306] [2021-08-06 14:32:56,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:56,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:56,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:56,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:56,157 INFO L87 Difference]: Start difference. First operand 554 states and 1640 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:56,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:56,901 INFO L93 Difference]: Finished difference Result 730 states and 1952 transitions. [2021-08-06 14:32:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 14:32:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:32:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:56,902 INFO L225 Difference]: With dead ends: 730 [2021-08-06 14:32:56,902 INFO L226 Difference]: Without dead ends: 725 [2021-08-06 14:32:56,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 551.9ms TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:32:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-08-06 14:32:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 567. [2021-08-06 14:32:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.964664310954064) internal successors, (1678), 566 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1678 transitions. [2021-08-06 14:32:56,909 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1678 transitions. Word has length 17 [2021-08-06 14:32:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:56,910 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1678 transitions. [2021-08-06 14:32:56,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:32:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1678 transitions. [2021-08-06 14:32:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:56,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:56,910 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:56,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:57,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:57,137 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:32:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1205065511, now seen corresponding path program 181 times [2021-08-06 14:32:57,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:57,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137641536] [2021-08-06 14:32:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:57,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:57,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:57,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137641536] [2021-08-06 14:32:57,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137641536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:57,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721973486] [2021-08-06 14:32:57,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:57,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:57,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:57,251 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:57,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-06 14:33:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:02,005 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:02,005 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 43 treesize of output 40 [2021-08-06 14:33:02,010 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:02,010 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 34 [2021-08-06 14:33:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:02,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721973486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:02,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:02,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:02,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577258198] [2021-08-06 14:33:02,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:02,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:02,064 INFO L87 Difference]: Start difference. First operand 567 states and 1678 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:02,597 INFO L93 Difference]: Finished difference Result 669 states and 1850 transitions. [2021-08-06 14:33:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:33:02,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:02,599 INFO L225 Difference]: With dead ends: 669 [2021-08-06 14:33:02,599 INFO L226 Difference]: Without dead ends: 661 [2021-08-06 14:33:02,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:33:02,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-06 14:33:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 571. [2021-08-06 14:33:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.9403508771929823) internal successors, (1676), 570 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1676 transitions. [2021-08-06 14:33:02,605 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1676 transitions. Word has length 17 [2021-08-06 14:33:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:02,606 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 1676 transitions. [2021-08-06 14:33:02,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1676 transitions. [2021-08-06 14:33:02,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:02,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:02,606 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:02,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:02,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:02,817 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:02,817 INFO L82 PathProgramCache]: Analyzing trace with hash 562679891, now seen corresponding path program 182 times [2021-08-06 14:33:02,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:02,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489377484] [2021-08-06 14:33:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:02,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:02,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:02,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489377484] [2021-08-06 14:33:02,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489377484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:02,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790412552] [2021-08-06 14:33:02,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:02,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:02,928 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:02,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-06 14:33:07,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:07,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:07,775 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:07,775 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 41 treesize of output 38 [2021-08-06 14:33:07,780 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:07,780 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 34 treesize of output 29 [2021-08-06 14:33:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:07,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790412552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:07,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:07,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:07,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013926746] [2021-08-06 14:33:07,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:07,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:07,825 INFO L87 Difference]: Start difference. First operand 571 states and 1676 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:08,302 INFO L93 Difference]: Finished difference Result 763 states and 2025 transitions. [2021-08-06 14:33:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:33:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:08,303 INFO L225 Difference]: With dead ends: 763 [2021-08-06 14:33:08,303 INFO L226 Difference]: Without dead ends: 763 [2021-08-06 14:33:08,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:33:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-08-06 14:33:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 575. [2021-08-06 14:33:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.9355400696864113) internal successors, (1685), 574 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1685 transitions. [2021-08-06 14:33:08,310 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1685 transitions. Word has length 17 [2021-08-06 14:33:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:08,310 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1685 transitions. [2021-08-06 14:33:08,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1685 transitions. [2021-08-06 14:33:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:08,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:08,311 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:08,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2021-08-06 14:33:08,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:08,533 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1861027465, now seen corresponding path program 183 times [2021-08-06 14:33:08,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:08,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226343380] [2021-08-06 14:33:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:08,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:08,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:08,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226343380] [2021-08-06 14:33:08,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226343380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:08,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89053389] [2021-08-06 14:33:08,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:33:08,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:08,682 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:08,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-06 14:33:13,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:33:13,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:13,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:13,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:13,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:33:13,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:33:13,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:33:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:33:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:13,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89053389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:13,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:13,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:13,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222700762] [2021-08-06 14:33:13,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:13,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:13,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:13,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:13,617 INFO L87 Difference]: Start difference. First operand 575 states and 1685 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:14,175 INFO L93 Difference]: Finished difference Result 697 states and 1923 transitions. [2021-08-06 14:33:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:33:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:14,176 INFO L225 Difference]: With dead ends: 697 [2021-08-06 14:33:14,176 INFO L226 Difference]: Without dead ends: 693 [2021-08-06 14:33:14,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:33:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-08-06 14:33:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 590. [2021-08-06 14:33:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.933786078098472) internal successors, (1728), 589 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1728 transitions. [2021-08-06 14:33:14,183 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1728 transitions. Word has length 17 [2021-08-06 14:33:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:14,183 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1728 transitions. [2021-08-06 14:33:14,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1728 transitions. [2021-08-06 14:33:14,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:14,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:14,184 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:14,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:14,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:14,385 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:14,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash -131980131, now seen corresponding path program 184 times [2021-08-06 14:33:14,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:14,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551850578] [2021-08-06 14:33:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:14,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:14,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:14,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551850578] [2021-08-06 14:33:14,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551850578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:14,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806089006] [2021-08-06 14:33:14,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:33:14,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:14,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:14,528 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:14,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-06 14:33:19,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:33:19,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:19,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:19,459 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:19,459 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 43 treesize of output 40 [2021-08-06 14:33:19,464 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:19,464 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 34 [2021-08-06 14:33:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806089006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:19,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:19,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:19,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741220357] [2021-08-06 14:33:19,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:19,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:19,518 INFO L87 Difference]: Start difference. First operand 590 states and 1728 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:19,805 INFO L93 Difference]: Finished difference Result 643 states and 1823 transitions. [2021-08-06 14:33:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:33:19,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:19,806 INFO L225 Difference]: With dead ends: 643 [2021-08-06 14:33:19,807 INFO L226 Difference]: Without dead ends: 635 [2021-08-06 14:33:19,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:33:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-06 14:33:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 590. [2021-08-06 14:33:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.9269949066213923) internal successors, (1724), 589 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1724 transitions. [2021-08-06 14:33:19,813 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1724 transitions. Word has length 17 [2021-08-06 14:33:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:19,813 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1724 transitions. [2021-08-06 14:33:19,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1724 transitions. [2021-08-06 14:33:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:19,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:19,814 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:19,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-06 14:33:20,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:20,041 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1928879671, now seen corresponding path program 185 times [2021-08-06 14:33:20,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:20,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611841703] [2021-08-06 14:33:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:20,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:20,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:20,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611841703] [2021-08-06 14:33:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611841703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:20,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738994285] [2021-08-06 14:33:20,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:33:20,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:20,163 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:20,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-06 14:33:24,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:33:24,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:24,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:25,157 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:25,157 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 43 treesize of output 40 [2021-08-06 14:33:25,163 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:25,163 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 34 [2021-08-06 14:33:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738994285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:25,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:25,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:25,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348925131] [2021-08-06 14:33:25,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:25,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:25,217 INFO L87 Difference]: Start difference. First operand 590 states and 1724 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:25,486 INFO L93 Difference]: Finished difference Result 639 states and 1813 transitions. [2021-08-06 14:33:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:33:25,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:25,487 INFO L225 Difference]: With dead ends: 639 [2021-08-06 14:33:25,487 INFO L226 Difference]: Without dead ends: 627 [2021-08-06 14:33:25,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 292.0ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:33:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-08-06 14:33:25,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 592. [2021-08-06 14:33:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.9153976311336716) internal successors, (1723), 591 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1723 transitions. [2021-08-06 14:33:25,507 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1723 transitions. Word has length 17 [2021-08-06 14:33:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:25,507 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1723 transitions. [2021-08-06 14:33:25,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1723 transitions. [2021-08-06 14:33:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:25,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:25,508 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:25,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:25,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:25,737 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 146360275, now seen corresponding path program 186 times [2021-08-06 14:33:25,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:25,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922068743] [2021-08-06 14:33:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:25,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:25,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:25,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922068743] [2021-08-06 14:33:25,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922068743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:25,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975918473] [2021-08-06 14:33:25,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:33:25,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:25,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:25,853 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:25,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-06 14:33:30,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:33:30,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:30,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:30,767 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:30,768 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 41 treesize of output 38 [2021-08-06 14:33:30,773 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:30,773 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 34 treesize of output 29 [2021-08-06 14:33:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:30,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975918473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:30,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:30,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:30,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995252251] [2021-08-06 14:33:30,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:30,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:30,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:30,818 INFO L87 Difference]: Start difference. First operand 592 states and 1723 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:31,128 INFO L93 Difference]: Finished difference Result 687 states and 1918 transitions. [2021-08-06 14:33:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:33:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:31,129 INFO L225 Difference]: With dead ends: 687 [2021-08-06 14:33:31,129 INFO L226 Difference]: Without dead ends: 687 [2021-08-06 14:33:31,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:33:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-08-06 14:33:31,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 592. [2021-08-06 14:33:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.9153976311336716) internal successors, (1723), 591 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1723 transitions. [2021-08-06 14:33:31,136 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1723 transitions. Word has length 17 [2021-08-06 14:33:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:31,136 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1723 transitions. [2021-08-06 14:33:31,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1723 transitions. [2021-08-06 14:33:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:31,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:31,137 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:31,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:31,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-06 14:33:31,337 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash -267672943, now seen corresponding path program 187 times [2021-08-06 14:33:31,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:31,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274987462] [2021-08-06 14:33:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:31,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:31,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274987462] [2021-08-06 14:33:31,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274987462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729389219] [2021-08-06 14:33:31,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:33:31,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:31,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:31,488 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:31,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-06 14:33:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:36,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:36,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:33:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:33:36,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:33:36,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:33:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:36,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729389219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:36,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:36,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:36,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582374324] [2021-08-06 14:33:36,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:36,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:36,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:36,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:36,532 INFO L87 Difference]: Start difference. First operand 592 states and 1723 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:36,778 INFO L93 Difference]: Finished difference Result 698 states and 1924 transitions. [2021-08-06 14:33:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:33:36,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:33:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:36,780 INFO L225 Difference]: With dead ends: 698 [2021-08-06 14:33:36,780 INFO L226 Difference]: Without dead ends: 698 [2021-08-06 14:33:36,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:33:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-08-06 14:33:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 604. [2021-08-06 14:33:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.925373134328358) internal successors, (1764), 603 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1764 transitions. [2021-08-06 14:33:36,786 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1764 transitions. Word has length 17 [2021-08-06 14:33:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:36,786 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1764 transitions. [2021-08-06 14:33:36,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1764 transitions. [2021-08-06 14:33:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:36,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:36,787 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:36,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:36,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:36,988 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash 533943285, now seen corresponding path program 188 times [2021-08-06 14:33:36,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:36,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546128450] [2021-08-06 14:33:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:36,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:37,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:37,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546128450] [2021-08-06 14:33:37,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546128450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:37,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094842926] [2021-08-06 14:33:37,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:37,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:37,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:37,148 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:37,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-06 14:33:41,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:41,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:41,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:33:42,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:33:42,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:33:42,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:33:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:42,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094842926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:42,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:42,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:42,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769337456] [2021-08-06 14:33:42,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:42,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:42,241 INFO L87 Difference]: Start difference. First operand 604 states and 1764 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:42,998 INFO L93 Difference]: Finished difference Result 738 states and 1996 transitions. [2021-08-06 14:33:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:33:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:42,999 INFO L225 Difference]: With dead ends: 738 [2021-08-06 14:33:42,999 INFO L226 Difference]: Without dead ends: 728 [2021-08-06 14:33:43,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:33:43,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-08-06 14:33:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 612. [2021-08-06 14:33:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.927986906710311) internal successors, (1789), 611 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1789 transitions. [2021-08-06 14:33:43,006 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1789 transitions. Word has length 17 [2021-08-06 14:33:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:43,006 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1789 transitions. [2021-08-06 14:33:43,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1789 transitions. [2021-08-06 14:33:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:43,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:43,007 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:43,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:43,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-06 14:33:43,208 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2042680305, now seen corresponding path program 189 times [2021-08-06 14:33:43,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:43,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332208194] [2021-08-06 14:33:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:43,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:43,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:43,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332208194] [2021-08-06 14:33:43,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332208194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:43,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964235950] [2021-08-06 14:33:43,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:33:43,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:43,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:43,416 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:43,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-06 14:33:48,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:33:48,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:48,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:48,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:33:48,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:33:48,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:33:48,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:33:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964235950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:48,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:48,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:48,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086643310] [2021-08-06 14:33:48,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:48,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:48,418 INFO L87 Difference]: Start difference. First operand 612 states and 1789 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:48,861 INFO L93 Difference]: Finished difference Result 716 states and 1968 transitions. [2021-08-06 14:33:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:33:48,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:48,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:48,863 INFO L225 Difference]: With dead ends: 716 [2021-08-06 14:33:48,863 INFO L226 Difference]: Without dead ends: 716 [2021-08-06 14:33:48,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:33:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-08-06 14:33:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 601. [2021-08-06 14:33:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.915) internal successors, (1749), 600 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1749 transitions. [2021-08-06 14:33:48,870 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1749 transitions. Word has length 17 [2021-08-06 14:33:48,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:48,870 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1749 transitions. [2021-08-06 14:33:48,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:48,870 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1749 transitions. [2021-08-06 14:33:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:48,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:48,871 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:48,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:49,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-06 14:33:49,097 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash 541673683, now seen corresponding path program 190 times [2021-08-06 14:33:49,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:49,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389654177] [2021-08-06 14:33:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:49,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:49,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:49,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389654177] [2021-08-06 14:33:49,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389654177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:49,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854181966] [2021-08-06 14:33:49,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:33:49,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:49,218 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:49,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-06 14:33:54,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:33:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:33:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:54,341 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:54,342 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 41 treesize of output 38 [2021-08-06 14:33:54,347 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:54,347 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 34 treesize of output 29 [2021-08-06 14:33:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:54,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854181966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:54,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:54,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:33:54,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753194242] [2021-08-06 14:33:54,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:54,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:54,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:54,392 INFO L87 Difference]: Start difference. First operand 601 states and 1749 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:54,919 INFO L93 Difference]: Finished difference Result 741 states and 2011 transitions. [2021-08-06 14:33:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:33:54,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:33:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:54,920 INFO L225 Difference]: With dead ends: 741 [2021-08-06 14:33:54,920 INFO L226 Difference]: Without dead ends: 741 [2021-08-06 14:33:54,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:33:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-08-06 14:33:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 600. [2021-08-06 14:33:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.9131886477462436) internal successors, (1745), 599 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1745 transitions. [2021-08-06 14:33:54,927 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1745 transitions. Word has length 17 [2021-08-06 14:33:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:54,927 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1745 transitions. [2021-08-06 14:33:54,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:33:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1745 transitions. [2021-08-06 14:33:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:54,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:54,928 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:54,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-08-06 14:33:55,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-08-06 14:33:55,145 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:33:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash -947731313, now seen corresponding path program 191 times [2021-08-06 14:33:55,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:55,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841226126] [2021-08-06 14:33:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:55,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:55,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:55,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841226126] [2021-08-06 14:33:55,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841226126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:55,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057175159] [2021-08-06 14:33:55,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:33:55,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:55,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:55,286 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:55,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-06 14:34:00,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:34:00,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:00,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:00,314 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:00,315 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 41 treesize of output 38 [2021-08-06 14:34:00,320 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:00,320 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 34 treesize of output 29 [2021-08-06 14:34:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:00,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057175159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:00,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:00,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:34:00,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669991387] [2021-08-06 14:34:00,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:00,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:00,367 INFO L87 Difference]: Start difference. First operand 600 states and 1745 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:34:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:00,865 INFO L93 Difference]: Finished difference Result 689 states and 1934 transitions. [2021-08-06 14:34:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:34:00,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:34:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:00,866 INFO L225 Difference]: With dead ends: 689 [2021-08-06 14:34:00,866 INFO L226 Difference]: Without dead ends: 689 [2021-08-06 14:34:00,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:34:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-08-06 14:34:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 602. [2021-08-06 14:34:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.913477537437604) internal successors, (1751), 601 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1751 transitions. [2021-08-06 14:34:00,873 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1751 transitions. Word has length 17 [2021-08-06 14:34:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:00,873 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1751 transitions. [2021-08-06 14:34:00,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:34:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1751 transitions. [2021-08-06 14:34:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:00,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:00,874 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:00,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:01,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-08-06 14:34:01,093 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:01,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:01,093 INFO L82 PathProgramCache]: Analyzing trace with hash 125354067, now seen corresponding path program 192 times [2021-08-06 14:34:01,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:01,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106429126] [2021-08-06 14:34:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:01,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:01,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:01,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106429126] [2021-08-06 14:34:01,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106429126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:01,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455316584] [2021-08-06 14:34:01,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:34:01,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:01,250 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:01,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-06 14:34:06,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:34:06,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:06,330 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:06,330 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 41 treesize of output 38 [2021-08-06 14:34:06,336 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:06,336 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 34 treesize of output 29 [2021-08-06 14:34:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:06,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455316584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:06,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:06,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:34:06,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459295732] [2021-08-06 14:34:06,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:06,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:06,380 INFO L87 Difference]: Start difference. First operand 602 states and 1751 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:34:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:06,563 INFO L93 Difference]: Finished difference Result 657 states and 1865 transitions. [2021-08-06 14:34:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:34:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 17 [2021-08-06 14:34:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:06,564 INFO L225 Difference]: With dead ends: 657 [2021-08-06 14:34:06,564 INFO L226 Difference]: Without dead ends: 657 [2021-08-06 14:34:06,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-06 14:34:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 602. [2021-08-06 14:34:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.913477537437604) internal successors, (1751), 601 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1751 transitions. [2021-08-06 14:34:06,571 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1751 transitions. Word has length 17 [2021-08-06 14:34:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:06,571 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1751 transitions. [2021-08-06 14:34:06,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-08-06 14:34:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1751 transitions. [2021-08-06 14:34:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:06,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:06,572 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:06,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:06,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:06,793 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash 150986867, now seen corresponding path program 193 times [2021-08-06 14:34:06,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:06,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521947736] [2021-08-06 14:34:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:06,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:06,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:06,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521947736] [2021-08-06 14:34:06,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521947736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:06,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285373229] [2021-08-06 14:34:06,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:34:06,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:06,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:06,935 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:06,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-06 14:34:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:11,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:11,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:11,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:34:11,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:11,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:34:11,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:11,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:34:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:11,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285373229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:11,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:11,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:11,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035171506] [2021-08-06 14:34:11,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:11,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:11,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:11,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:11,996 INFO L87 Difference]: Start difference. First operand 602 states and 1751 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:12,272 INFO L93 Difference]: Finished difference Result 766 states and 2109 transitions. [2021-08-06 14:34:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:34:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:34:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:12,273 INFO L225 Difference]: With dead ends: 766 [2021-08-06 14:34:12,273 INFO L226 Difference]: Without dead ends: 766 [2021-08-06 14:34:12,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:34:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-06 14:34:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 645. [2021-08-06 14:34:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.9642857142857144) internal successors, (1909), 644 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1909 transitions. [2021-08-06 14:34:12,281 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1909 transitions. Word has length 17 [2021-08-06 14:34:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:12,281 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1909 transitions. [2021-08-06 14:34:12,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1909 transitions. [2021-08-06 14:34:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:12,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:12,282 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:12,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:12,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-06 14:34:12,509 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1705035991, now seen corresponding path program 194 times [2021-08-06 14:34:12,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:12,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998750539] [2021-08-06 14:34:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:12,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:12,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:12,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998750539] [2021-08-06 14:34:12,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998750539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:12,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498104746] [2021-08-06 14:34:12,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:34:12,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:12,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:12,711 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:12,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-06 14:34:17,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:17,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:17,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:17,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:34:17,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:17,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:34:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498104746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:17,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:17,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:17,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470041993] [2021-08-06 14:34:17,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:17,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:17,890 INFO L87 Difference]: Start difference. First operand 645 states and 1909 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:18,318 INFO L93 Difference]: Finished difference Result 724 states and 2021 transitions. [2021-08-06 14:34:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:34:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:34:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:18,320 INFO L225 Difference]: With dead ends: 724 [2021-08-06 14:34:18,320 INFO L226 Difference]: Without dead ends: 718 [2021-08-06 14:34:18,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 398.0ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:34:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-06 14:34:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 648. [2021-08-06 14:34:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.952086553323029) internal successors, (1910), 647 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1910 transitions. [2021-08-06 14:34:18,349 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1910 transitions. Word has length 17 [2021-08-06 14:34:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:18,349 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1910 transitions. [2021-08-06 14:34:18,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1910 transitions. [2021-08-06 14:34:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:18,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:18,350 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:18,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-06 14:34:18,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:18,550 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:18,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:18,551 INFO L82 PathProgramCache]: Analyzing trace with hash 390629205, now seen corresponding path program 195 times [2021-08-06 14:34:18,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:18,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170770198] [2021-08-06 14:34:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:18,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:18,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:18,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170770198] [2021-08-06 14:34:18,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170770198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:18,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029607802] [2021-08-06 14:34:18,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:18,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:18,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:18,656 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:18,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-06 14:34:23,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:34:23,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:23,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:23,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:23,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:34:23,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:23,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:34:23,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:23,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:34:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029607802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:23,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:23,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:23,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570102288] [2021-08-06 14:34:23,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:23,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:23,827 INFO L87 Difference]: Start difference. First operand 648 states and 1910 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:24,513 INFO L93 Difference]: Finished difference Result 821 states and 2240 transitions. [2021-08-06 14:34:24,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:34:24,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:34:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:24,515 INFO L225 Difference]: With dead ends: 821 [2021-08-06 14:34:24,515 INFO L226 Difference]: Without dead ends: 819 [2021-08-06 14:34:24,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:34:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-06 14:34:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 655. [2021-08-06 14:34:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.967889908256881) internal successors, (1941), 654 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1941 transitions. [2021-08-06 14:34:24,538 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1941 transitions. Word has length 17 [2021-08-06 14:34:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:24,538 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1941 transitions. [2021-08-06 14:34:24,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1941 transitions. [2021-08-06 14:34:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:24,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:24,539 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:24,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:24,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:24,739 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:24,739 INFO L82 PathProgramCache]: Analyzing trace with hash -529071503, now seen corresponding path program 196 times [2021-08-06 14:34:24,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:24,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568394795] [2021-08-06 14:34:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:24,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:24,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:24,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568394795] [2021-08-06 14:34:24,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568394795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:24,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409012771] [2021-08-06 14:34:24,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:34:24,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:24,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:24,880 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:24,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-06 14:34:29,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:34:29,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:29,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:30,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:30,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:34:30,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:30,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:34:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:30,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409012771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:30,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:30,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:30,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890971456] [2021-08-06 14:34:30,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:30,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:30,066 INFO L87 Difference]: Start difference. First operand 655 states and 1941 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:30,660 INFO L93 Difference]: Finished difference Result 735 states and 2066 transitions. [2021-08-06 14:34:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 14:34:30,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:34:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:30,661 INFO L225 Difference]: With dead ends: 735 [2021-08-06 14:34:30,661 INFO L226 Difference]: Without dead ends: 731 [2021-08-06 14:34:30,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:34:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-08-06 14:34:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 659. [2021-08-06 14:34:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.952887537993921) internal successors, (1943), 658 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1943 transitions. [2021-08-06 14:34:30,669 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1943 transitions. Word has length 17 [2021-08-06 14:34:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:30,669 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1943 transitions. [2021-08-06 14:34:30,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1943 transitions. [2021-08-06 14:34:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:30,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:30,670 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:30,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:30,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-08-06 14:34:30,889 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 398359603, now seen corresponding path program 197 times [2021-08-06 14:34:30,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:30,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551825314] [2021-08-06 14:34:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:30,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:31,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:31,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551825314] [2021-08-06 14:34:31,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551825314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:31,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100630060] [2021-08-06 14:34:31,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:34:31,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:31,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:31,218 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:31,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-06 14:34:35,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:34:35,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:35,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:36,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:36,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:34:36,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:36,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:34:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:36,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100630060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:36,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:36,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:36,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587662816] [2021-08-06 14:34:36,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:36,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:36,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:36,198 INFO L87 Difference]: Start difference. First operand 659 states and 1943 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:36,857 INFO L93 Difference]: Finished difference Result 843 states and 2234 transitions. [2021-08-06 14:34:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:34:36,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:34:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:36,858 INFO L225 Difference]: With dead ends: 843 [2021-08-06 14:34:36,858 INFO L226 Difference]: Without dead ends: 841 [2021-08-06 14:34:36,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:34:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-08-06 14:34:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 655. [2021-08-06 14:34:36,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.9357798165137616) internal successors, (1920), 654 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1920 transitions. [2021-08-06 14:34:36,867 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1920 transitions. Word has length 17 [2021-08-06 14:34:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:36,867 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1920 transitions. [2021-08-06 14:34:36,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1920 transitions. [2021-08-06 14:34:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:36,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:36,868 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:36,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:37,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:37,093 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:37,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:37,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1199975831, now seen corresponding path program 198 times [2021-08-06 14:34:37,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:37,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466685743] [2021-08-06 14:34:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:37,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:37,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:37,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466685743] [2021-08-06 14:34:37,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466685743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:37,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106493704] [2021-08-06 14:34:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:34:37,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:37,291 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:37,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-06 14:34:42,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:34:42,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:42,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:42,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:42,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:34:42,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:42,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:34:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:42,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106493704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:42,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:42,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:42,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708675011] [2021-08-06 14:34:42,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:42,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:42,516 INFO L87 Difference]: Start difference. First operand 655 states and 1920 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:43,064 INFO L93 Difference]: Finished difference Result 790 states and 2155 transitions. [2021-08-06 14:34:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:34:43,064 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:34:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:43,065 INFO L225 Difference]: With dead ends: 790 [2021-08-06 14:34:43,065 INFO L226 Difference]: Without dead ends: 786 [2021-08-06 14:34:43,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 554.7ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:34:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-08-06 14:34:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 665. [2021-08-06 14:34:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.933734939759036) internal successors, (1948), 664 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1948 transitions. [2021-08-06 14:34:43,073 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1948 transitions. Word has length 17 [2021-08-06 14:34:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:43,073 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1948 transitions. [2021-08-06 14:34:43,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1948 transitions. [2021-08-06 14:34:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:43,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:43,074 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:43,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:43,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-06 14:34:43,293 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1376647759, now seen corresponding path program 199 times [2021-08-06 14:34:43,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:43,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041466516] [2021-08-06 14:34:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:43,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:43,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:43,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041466516] [2021-08-06 14:34:43,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041466516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:43,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929957964] [2021-08-06 14:34:43,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:34:43,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:43,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:43,451 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:43,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-06 14:34:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:48,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:48,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:48,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:34:48,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:48,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:34:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:48,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929957964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:48,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:48,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:48,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048767642] [2021-08-06 14:34:48,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:48,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:48,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:48,786 INFO L87 Difference]: Start difference. First operand 665 states and 1948 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:49,299 INFO L93 Difference]: Finished difference Result 785 states and 2139 transitions. [2021-08-06 14:34:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:34:49,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:34:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:49,300 INFO L225 Difference]: With dead ends: 785 [2021-08-06 14:34:49,300 INFO L226 Difference]: Without dead ends: 785 [2021-08-06 14:34:49,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:34:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-08-06 14:34:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 637. [2021-08-06 14:34:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.907232704402516) internal successors, (1849), 636 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1849 transitions. [2021-08-06 14:34:49,308 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1849 transitions. Word has length 17 [2021-08-06 14:34:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:49,308 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1849 transitions. [2021-08-06 14:34:49,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1849 transitions. [2021-08-06 14:34:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:49,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:49,309 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:49,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2021-08-06 14:34:49,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-06 14:34:49,509 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1216001127, now seen corresponding path program 200 times [2021-08-06 14:34:49,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:49,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863448777] [2021-08-06 14:34:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:49,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:34:49,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:49,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863448777] [2021-08-06 14:34:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863448777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:49,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290433655] [2021-08-06 14:34:49,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:34:49,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:49,642 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:49,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-06 14:34:54,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:54,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:54,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:34:54,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:54,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:34:54,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:34:54,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:34:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:54,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290433655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:54,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:54,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:34:54,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431179410] [2021-08-06 14:34:54,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:54,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:54,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:54,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:54,848 INFO L87 Difference]: Start difference. First operand 637 states and 1849 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:55,460 INFO L93 Difference]: Finished difference Result 718 states and 1969 transitions. [2021-08-06 14:34:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:34:55,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:34:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:55,461 INFO L225 Difference]: With dead ends: 718 [2021-08-06 14:34:55,461 INFO L226 Difference]: Without dead ends: 714 [2021-08-06 14:34:55,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 561.8ms TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 14:34:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-08-06 14:34:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 636. [2021-08-06 14:34:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.899212598425197) internal successors, (1841), 635 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1841 transitions. [2021-08-06 14:34:55,478 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1841 transitions. Word has length 17 [2021-08-06 14:34:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:55,478 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1841 transitions. [2021-08-06 14:34:55,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1841 transitions. [2021-08-06 14:34:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:55,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:55,479 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:55,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:55,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-06 14:34:55,701 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:34:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash -17960013, now seen corresponding path program 201 times [2021-08-06 14:34:55,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:55,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265554681] [2021-08-06 14:34:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:55,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:55,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:55,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265554681] [2021-08-06 14:34:55,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265554681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:55,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053026019] [2021-08-06 14:34:55,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:55,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:55,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:55,836 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:55,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-06 14:35:00,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:35:00,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:00,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:00,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:01,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:01,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:35:01,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:01,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:35:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:01,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053026019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:01,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:01,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:01,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442692334] [2021-08-06 14:35:01,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:01,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:01,175 INFO L87 Difference]: Start difference. First operand 636 states and 1841 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:01,577 INFO L93 Difference]: Finished difference Result 734 states and 1998 transitions. [2021-08-06 14:35:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:35:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:01,578 INFO L225 Difference]: With dead ends: 734 [2021-08-06 14:35:01,578 INFO L226 Difference]: Without dead ends: 732 [2021-08-06 14:35:01,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:35:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-08-06 14:35:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 630. [2021-08-06 14:35:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 2.888712241653418) internal successors, (1817), 629 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:01,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1817 transitions. [2021-08-06 14:35:01,588 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1817 transitions. Word has length 17 [2021-08-06 14:35:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:01,588 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1817 transitions. [2021-08-06 14:35:01,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1817 transitions. [2021-08-06 14:35:01,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:01,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:01,589 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:01,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:01,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:01,817 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash 783656215, now seen corresponding path program 202 times [2021-08-06 14:35:01,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:01,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862004803] [2021-08-06 14:35:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:01,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:01,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:01,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862004803] [2021-08-06 14:35:01,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862004803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:01,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662993910] [2021-08-06 14:35:01,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:35:01,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:01,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:01,954 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:01,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-06 14:35:07,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:35:07,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:07,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:07,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:07,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:07,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:35:07,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:07,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:35:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:07,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662993910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:07,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:07,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:07,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231487769] [2021-08-06 14:35:07,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:07,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:07,501 INFO L87 Difference]: Start difference. First operand 630 states and 1817 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:08,062 INFO L93 Difference]: Finished difference Result 728 states and 1993 transitions. [2021-08-06 14:35:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 14:35:08,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:08,063 INFO L225 Difference]: With dead ends: 728 [2021-08-06 14:35:08,063 INFO L226 Difference]: Without dead ends: 722 [2021-08-06 14:35:08,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:35:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-08-06 14:35:08,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 638. [2021-08-06 14:35:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.8759811616954476) internal successors, (1832), 637 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1832 transitions. [2021-08-06 14:35:08,079 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1832 transitions. Word has length 17 [2021-08-06 14:35:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:08,079 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1832 transitions. [2021-08-06 14:35:08,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1832 transitions. [2021-08-06 14:35:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:08,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:08,080 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:08,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:08,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-06 14:35:08,309 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1792967375, now seen corresponding path program 203 times [2021-08-06 14:35:08,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:08,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322891786] [2021-08-06 14:35:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:08,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:08,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:08,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322891786] [2021-08-06 14:35:08,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322891786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:08,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848146524] [2021-08-06 14:35:08,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:35:08,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:08,445 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:08,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-06 14:35:13,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:35:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:13,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:13,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:35:13,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:13,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:35:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:13,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848146524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:13,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:13,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:13,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963402279] [2021-08-06 14:35:13,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:13,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:13,729 INFO L87 Difference]: Start difference. First operand 638 states and 1832 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:14,129 INFO L93 Difference]: Finished difference Result 717 states and 1958 transitions. [2021-08-06 14:35:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:35:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:14,131 INFO L225 Difference]: With dead ends: 717 [2021-08-06 14:35:14,131 INFO L226 Difference]: Without dead ends: 715 [2021-08-06 14:35:14,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:35:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-08-06 14:35:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 626. [2021-08-06 14:35:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.8544) internal successors, (1784), 625 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1784 transitions. [2021-08-06 14:35:14,138 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1784 transitions. Word has length 17 [2021-08-06 14:35:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:14,138 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1784 transitions. [2021-08-06 14:35:14,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1784 transitions. [2021-08-06 14:35:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:14,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:14,139 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:14,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:14,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:14,361 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash 791386613, now seen corresponding path program 204 times [2021-08-06 14:35:14,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:14,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862584519] [2021-08-06 14:35:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:14,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:14,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:14,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862584519] [2021-08-06 14:35:14,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862584519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:14,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461795149] [2021-08-06 14:35:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:35:14,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:14,484 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:14,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-06 14:35:19,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:35:19,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:19,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:19,972 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:19,972 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 41 treesize of output 38 [2021-08-06 14:35:19,977 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:19,977 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 34 treesize of output 29 [2021-08-06 14:35:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:20,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461795149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:20,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:20,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:20,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772378803] [2021-08-06 14:35:20,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:20,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:20,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:20,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:20,023 INFO L87 Difference]: Start difference. First operand 626 states and 1784 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:20,294 INFO L93 Difference]: Finished difference Result 714 states and 1954 transitions. [2021-08-06 14:35:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:35:20,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:20,296 INFO L225 Difference]: With dead ends: 714 [2021-08-06 14:35:20,296 INFO L226 Difference]: Without dead ends: 714 [2021-08-06 14:35:20,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:35:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-08-06 14:35:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 619. [2021-08-06 14:35:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.8608414239482203) internal successors, (1768), 618 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1768 transitions. [2021-08-06 14:35:20,303 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1768 transitions. Word has length 17 [2021-08-06 14:35:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:20,303 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1768 transitions. [2021-08-06 14:35:20,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1768 transitions. [2021-08-06 14:35:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:20,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:20,304 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:20,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:20,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-06 14:35:20,525 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash -38966221, now seen corresponding path program 205 times [2021-08-06 14:35:20,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:20,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216377104] [2021-08-06 14:35:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:20,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:20,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:20,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216377104] [2021-08-06 14:35:20,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216377104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:20,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402694445] [2021-08-06 14:35:20,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:35:20,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:20,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:20,663 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:20,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-06 14:35:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:25,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:25,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:35:25,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:25,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:35:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402694445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:26,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:26,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:26,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132232801] [2021-08-06 14:35:26,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:26,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:26,092 INFO L87 Difference]: Start difference. First operand 619 states and 1768 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:26,463 INFO L93 Difference]: Finished difference Result 752 states and 2028 transitions. [2021-08-06 14:35:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:35:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:26,465 INFO L225 Difference]: With dead ends: 752 [2021-08-06 14:35:26,465 INFO L226 Difference]: Without dead ends: 752 [2021-08-06 14:35:26,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:35:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-08-06 14:35:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 642. [2021-08-06 14:35:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.8783151326053042) internal successors, (1845), 641 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1845 transitions. [2021-08-06 14:35:26,472 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1845 transitions. Word has length 17 [2021-08-06 14:35:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:26,472 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1845 transitions. [2021-08-06 14:35:26,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1845 transitions. [2021-08-06 14:35:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:26,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:26,473 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:26,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:26,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:26,673 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash 762650007, now seen corresponding path program 206 times [2021-08-06 14:35:26,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:26,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724230542] [2021-08-06 14:35:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:26,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:26,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:26,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724230542] [2021-08-06 14:35:26,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724230542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:26,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792188351] [2021-08-06 14:35:26,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:35:26,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:26,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:26,856 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:26,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-06 14:35:32,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:35:32,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:32,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:32,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:32,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:35:32,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:32,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:35:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:32,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792188351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:32,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:32,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:32,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314561114] [2021-08-06 14:35:32,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:32,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:32,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:32,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:32,333 INFO L87 Difference]: Start difference. First operand 642 states and 1845 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:33,028 INFO L93 Difference]: Finished difference Result 766 states and 2078 transitions. [2021-08-06 14:35:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 14:35:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:33,030 INFO L225 Difference]: With dead ends: 766 [2021-08-06 14:35:33,030 INFO L226 Difference]: Without dead ends: 755 [2021-08-06 14:35:33,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:35:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-08-06 14:35:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 651. [2021-08-06 14:35:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.876923076923077) internal successors, (1870), 650 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1870 transitions. [2021-08-06 14:35:33,037 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1870 transitions. Word has length 17 [2021-08-06 14:35:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:33,037 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1870 transitions. [2021-08-06 14:35:33,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1870 transitions. [2021-08-06 14:35:33,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:33,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:33,038 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:33,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:33,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-08-06 14:35:33,239 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1813973583, now seen corresponding path program 207 times [2021-08-06 14:35:33,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:33,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604320945] [2021-08-06 14:35:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:33,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:33,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:33,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604320945] [2021-08-06 14:35:33,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604320945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:33,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637966300] [2021-08-06 14:35:33,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:35:33,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:33,389 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:33,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-06 14:35:38,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:35:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:38,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:38,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:38,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:35:38,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:38,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:35:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:38,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637966300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:38,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:38,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:38,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233375977] [2021-08-06 14:35:38,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:38,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:38,906 INFO L87 Difference]: Start difference. First operand 651 states and 1870 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:39,357 INFO L93 Difference]: Finished difference Result 758 states and 2049 transitions. [2021-08-06 14:35:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:35:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:39,358 INFO L225 Difference]: With dead ends: 758 [2021-08-06 14:35:39,358 INFO L226 Difference]: Without dead ends: 752 [2021-08-06 14:35:39,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-08-06 14:35:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-08-06 14:35:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 636. [2021-08-06 14:35:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.851968503937008) internal successors, (1811), 635 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1811 transitions. [2021-08-06 14:35:39,379 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1811 transitions. Word has length 17 [2021-08-06 14:35:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:39,379 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1811 transitions. [2021-08-06 14:35:39,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1811 transitions. [2021-08-06 14:35:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:39,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:39,380 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:39,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:39,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:39,617 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:39,617 INFO L82 PathProgramCache]: Analyzing trace with hash 770380405, now seen corresponding path program 208 times [2021-08-06 14:35:39,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:39,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072115293] [2021-08-06 14:35:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:39,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:39,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:39,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072115293] [2021-08-06 14:35:39,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072115293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:39,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289459570] [2021-08-06 14:35:39,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:35:39,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:39,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:39,754 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:39,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-06 14:35:44,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:35:44,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:44,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:44,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:45,086 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:45,086 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 41 treesize of output 38 [2021-08-06 14:35:45,091 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:45,091 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 34 treesize of output 29 [2021-08-06 14:35:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:45,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289459570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:45,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:45,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:45,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925000987] [2021-08-06 14:35:45,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:45,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:45,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:45,138 INFO L87 Difference]: Start difference. First operand 636 states and 1811 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:45,703 INFO L93 Difference]: Finished difference Result 744 states and 2021 transitions. [2021-08-06 14:35:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:35:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:45,704 INFO L225 Difference]: With dead ends: 744 [2021-08-06 14:35:45,704 INFO L226 Difference]: Without dead ends: 744 [2021-08-06 14:35:45,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 488.0ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:35:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-08-06 14:35:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 630. [2021-08-06 14:35:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 2.850556438791733) internal successors, (1793), 629 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1793 transitions. [2021-08-06 14:35:45,711 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1793 transitions. Word has length 17 [2021-08-06 14:35:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:45,712 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1793 transitions. [2021-08-06 14:35:45,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1793 transitions. [2021-08-06 14:35:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:45,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:45,712 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:45,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:45,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-06 14:35:45,933 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash -719024591, now seen corresponding path program 209 times [2021-08-06 14:35:45,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:45,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354566498] [2021-08-06 14:35:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:45,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:46,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:46,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354566498] [2021-08-06 14:35:46,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354566498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:46,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502149598] [2021-08-06 14:35:46,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:35:46,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:46,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:46,238 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:46,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-06 14:35:51,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:35:51,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:51,671 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:51,671 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 41 treesize of output 38 [2021-08-06 14:35:51,677 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:51,677 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 34 treesize of output 29 [2021-08-06 14:35:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:51,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502149598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:51,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:51,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 14:35:51,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339078766] [2021-08-06 14:35:51,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:51,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:51,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:51,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:51,723 INFO L87 Difference]: Start difference. First operand 630 states and 1793 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:51,964 INFO L93 Difference]: Finished difference Result 693 states and 1917 transitions. [2021-08-06 14:35:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:35:51,964 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:51,965 INFO L225 Difference]: With dead ends: 693 [2021-08-06 14:35:51,965 INFO L226 Difference]: Without dead ends: 693 [2021-08-06 14:35:51,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:35:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-08-06 14:35:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 629. [2021-08-06 14:35:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.8503184713375798) internal successors, (1790), 628 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1790 transitions. [2021-08-06 14:35:51,972 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1790 transitions. Word has length 17 [2021-08-06 14:35:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:51,972 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1790 transitions. [2021-08-06 14:35:51,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1790 transitions. [2021-08-06 14:35:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:51,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:51,973 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:52,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-06 14:35:52,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-06 14:35:52,193 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash -690158669, now seen corresponding path program 210 times [2021-08-06 14:35:52,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:52,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137749617] [2021-08-06 14:35:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:52,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:52,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:52,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137749617] [2021-08-06 14:35:52,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137749617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:52,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417025677] [2021-08-06 14:35:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:35:52,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:52,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:52,331 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:52,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-06 14:35:57,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:35:57,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:35:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:57,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:57,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:35:57,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:57,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:35:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:57,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417025677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:57,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:57,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:35:57,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752275408] [2021-08-06 14:35:57,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:35:57,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:35:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:35:57,772 INFO L87 Difference]: Start difference. First operand 629 states and 1790 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:58,058 INFO L93 Difference]: Finished difference Result 773 states and 2052 transitions. [2021-08-06 14:35:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:35:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:35:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:58,060 INFO L225 Difference]: With dead ends: 773 [2021-08-06 14:35:58,060 INFO L226 Difference]: Without dead ends: 773 [2021-08-06 14:35:58,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:35:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-08-06 14:35:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 647. [2021-08-06 14:35:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.869969040247678) internal successors, (1854), 646 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1854 transitions. [2021-08-06 14:35:58,067 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1854 transitions. Word has length 17 [2021-08-06 14:35:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:58,067 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1854 transitions. [2021-08-06 14:35:58,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1854 transitions. [2021-08-06 14:35:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:58,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:58,068 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:58,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2021-08-06 14:35:58,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-06 14:35:58,293 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:35:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:58,293 INFO L82 PathProgramCache]: Analyzing trace with hash 111457559, now seen corresponding path program 211 times [2021-08-06 14:35:58,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:58,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800841964] [2021-08-06 14:35:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:58,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:58,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:58,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800841964] [2021-08-06 14:35:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800841964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:58,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224143787] [2021-08-06 14:35:58,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:35:58,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:58,473 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:58,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-06 14:36:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:03,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:03,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:03,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:03,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:36:03,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:03,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:36:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:03,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224143787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:03,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:03,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:03,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354314891] [2021-08-06 14:36:03,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:03,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:03,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:03,923 INFO L87 Difference]: Start difference. First operand 647 states and 1854 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:04,653 INFO L93 Difference]: Finished difference Result 807 states and 2127 transitions. [2021-08-06 14:36:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:36:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:04,654 INFO L225 Difference]: With dead ends: 807 [2021-08-06 14:36:04,654 INFO L226 Difference]: Without dead ends: 797 [2021-08-06 14:36:04,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:36:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-08-06 14:36:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 658. [2021-08-06 14:36:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.8751902587519025) internal successors, (1889), 657 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1889 transitions. [2021-08-06 14:36:04,662 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1889 transitions. Word has length 17 [2021-08-06 14:36:04,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:04,662 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1889 transitions. [2021-08-06 14:36:04,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1889 transitions. [2021-08-06 14:36:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:04,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:04,663 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:04,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:04,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:04,889 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:04,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1829801265, now seen corresponding path program 212 times [2021-08-06 14:36:04,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:04,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599270534] [2021-08-06 14:36:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:04,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:05,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:05,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599270534] [2021-08-06 14:36:05,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599270534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:05,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787024095] [2021-08-06 14:36:05,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:36:05,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:05,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:05,037 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:05,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-06 14:36:10,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:36:10,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:10,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:10,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:10,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:10,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:36:10,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:10,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:36:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:10,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787024095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:10,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:10,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:10,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988380784] [2021-08-06 14:36:10,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:10,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:10,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:10,717 INFO L87 Difference]: Start difference. First operand 658 states and 1889 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:11,258 INFO L93 Difference]: Finished difference Result 784 states and 2098 transitions. [2021-08-06 14:36:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 14:36:11,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:11,260 INFO L225 Difference]: With dead ends: 784 [2021-08-06 14:36:11,260 INFO L226 Difference]: Without dead ends: 784 [2021-08-06 14:36:11,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:36:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-08-06 14:36:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 649. [2021-08-06 14:36:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.861111111111111) internal successors, (1854), 648 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1854 transitions. [2021-08-06 14:36:11,267 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1854 transitions. Word has length 17 [2021-08-06 14:36:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:11,267 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1854 transitions. [2021-08-06 14:36:11,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1854 transitions. [2021-08-06 14:36:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:11,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:11,268 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:11,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:11,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-06 14:36:11,469 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 119187957, now seen corresponding path program 213 times [2021-08-06 14:36:11,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:11,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662833757] [2021-08-06 14:36:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:11,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:11,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:11,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662833757] [2021-08-06 14:36:11,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662833757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:11,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652337396] [2021-08-06 14:36:11,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:36:11,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:11,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:11,612 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:11,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-06 14:36:17,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:36:17,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:17,287 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:17,287 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 41 treesize of output 38 [2021-08-06 14:36:17,291 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:17,291 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 34 treesize of output 29 [2021-08-06 14:36:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:17,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652337396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:17,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:17,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:17,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95386337] [2021-08-06 14:36:17,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:17,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:17,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:17,327 INFO L87 Difference]: Start difference. First operand 649 states and 1854 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:17,900 INFO L93 Difference]: Finished difference Result 811 states and 2153 transitions. [2021-08-06 14:36:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:36:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:17,901 INFO L225 Difference]: With dead ends: 811 [2021-08-06 14:36:17,901 INFO L226 Difference]: Without dead ends: 811 [2021-08-06 14:36:17,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:36:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-08-06 14:36:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 644. [2021-08-06 14:36:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.8615863141524107) internal successors, (1840), 643 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1840 transitions. [2021-08-06 14:36:17,908 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1840 transitions. Word has length 17 [2021-08-06 14:36:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:17,909 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1840 transitions. [2021-08-06 14:36:17,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1840 transitions. [2021-08-06 14:36:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:17,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:17,909 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:17,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:18,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-08-06 14:36:18,133 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1370217039, now seen corresponding path program 214 times [2021-08-06 14:36:18,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:18,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11673976] [2021-08-06 14:36:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:18,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:18,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:18,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11673976] [2021-08-06 14:36:18,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11673976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:18,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282406455] [2021-08-06 14:36:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:36:18,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:18,259 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:18,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-06 14:36:23,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:36:23,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:23,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:23,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:23,843 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:23,843 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 41 treesize of output 38 [2021-08-06 14:36:23,848 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:23,848 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 34 treesize of output 29 [2021-08-06 14:36:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:23,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282406455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:23,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:23,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:23,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550357618] [2021-08-06 14:36:23,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:23,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:23,894 INFO L87 Difference]: Start difference. First operand 644 states and 1840 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:24,855 INFO L93 Difference]: Finished difference Result 794 states and 2140 transitions. [2021-08-06 14:36:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:36:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:24,856 INFO L225 Difference]: With dead ends: 794 [2021-08-06 14:36:24,857 INFO L226 Difference]: Without dead ends: 794 [2021-08-06 14:36:24,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 814.3ms TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 14:36:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-08-06 14:36:24,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 639. [2021-08-06 14:36:24,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.8589341692789967) internal successors, (1824), 638 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1824 transitions. [2021-08-06 14:36:24,865 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1824 transitions. Word has length 17 [2021-08-06 14:36:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:24,865 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1824 transitions. [2021-08-06 14:36:24,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1824 transitions. [2021-08-06 14:36:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:24,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:24,866 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:24,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2021-08-06 14:36:25,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-08-06 14:36:25,085 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash -297131659, now seen corresponding path program 215 times [2021-08-06 14:36:25,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:25,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242268894] [2021-08-06 14:36:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:25,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:25,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:25,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242268894] [2021-08-06 14:36:25,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242268894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:25,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214966607] [2021-08-06 14:36:25,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:36:25,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:25,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:25,224 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:25,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-06 14:36:30,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:36:30,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:30,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:30,543 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:30,543 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 41 treesize of output 38 [2021-08-06 14:36:30,548 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:30,548 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 34 treesize of output 29 [2021-08-06 14:36:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:30,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214966607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:30,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:30,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:30,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324309673] [2021-08-06 14:36:30,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:30,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:30,604 INFO L87 Difference]: Start difference. First operand 639 states and 1824 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:30,828 INFO L93 Difference]: Finished difference Result 689 states and 1918 transitions. [2021-08-06 14:36:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:36:30,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:30,830 INFO L225 Difference]: With dead ends: 689 [2021-08-06 14:36:30,830 INFO L226 Difference]: Without dead ends: 689 [2021-08-06 14:36:30,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:30,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-08-06 14:36:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 639. [2021-08-06 14:36:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.8589341692789967) internal successors, (1824), 638 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1824 transitions. [2021-08-06 14:36:30,839 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1824 transitions. Word has length 17 [2021-08-06 14:36:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:30,839 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1824 transitions. [2021-08-06 14:36:30,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1824 transitions. [2021-08-06 14:36:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:30,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:30,841 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:30,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:31,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-06 14:36:31,041 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash 906074359, now seen corresponding path program 216 times [2021-08-06 14:36:31,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:31,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029912795] [2021-08-06 14:36:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:31,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:31,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:31,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029912795] [2021-08-06 14:36:31,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029912795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:31,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988214942] [2021-08-06 14:36:31,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:36:31,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:31,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:31,219 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:31,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-06 14:36:36,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:36:36,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:36,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:36,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:36,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:36:36,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:36:36,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:36,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:36:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:36,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988214942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:36,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:36,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:36:36,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4626171] [2021-08-06 14:36:36,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:36:36,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:36:36,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:36:36,892 INFO L87 Difference]: Start difference. First operand 639 states and 1824 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:37,129 INFO L93 Difference]: Finished difference Result 771 states and 2088 transitions. [2021-08-06 14:36:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:36:37,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:37,131 INFO L225 Difference]: With dead ends: 771 [2021-08-06 14:36:37,131 INFO L226 Difference]: Without dead ends: 771 [2021-08-06 14:36:37,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:36:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-08-06 14:36:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 678. [2021-08-06 14:36:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 2.8833087149187593) internal successors, (1952), 677 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1952 transitions. [2021-08-06 14:36:37,139 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1952 transitions. Word has length 17 [2021-08-06 14:36:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:37,139 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1952 transitions. [2021-08-06 14:36:37,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1952 transitions. [2021-08-06 14:36:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:37,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:37,140 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:37,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-06 14:36:37,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-08-06 14:36:37,340 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:37,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1836956947, now seen corresponding path program 217 times [2021-08-06 14:36:37,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:37,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683010437] [2021-08-06 14:36:37,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:37,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:37,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:37,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683010437] [2021-08-06 14:36:37,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683010437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:37,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342726568] [2021-08-06 14:36:37,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:36:37,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:37,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:37,483 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:37,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-06 14:36:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:43,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:43,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:36:43,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:36:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:43,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342726568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:43,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:43,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:36:43,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991052943] [2021-08-06 14:36:43,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:36:43,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:36:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:36:43,084 INFO L87 Difference]: Start difference. First operand 678 states and 1952 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:43,396 INFO L93 Difference]: Finished difference Result 754 states and 2046 transitions. [2021-08-06 14:36:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:36:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:43,397 INFO L225 Difference]: With dead ends: 754 [2021-08-06 14:36:43,397 INFO L226 Difference]: Without dead ends: 746 [2021-08-06 14:36:43,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:36:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-08-06 14:36:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 684. [2021-08-06 14:36:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.8667642752562226) internal successors, (1958), 683 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1958 transitions. [2021-08-06 14:36:43,405 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1958 transitions. Word has length 17 [2021-08-06 14:36:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:43,405 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1958 transitions. [2021-08-06 14:36:43,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1958 transitions. [2021-08-06 14:36:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:43,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:43,406 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:43,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-06 14:36:43,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:43,621 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:43,621 INFO L82 PathProgramCache]: Analyzing trace with hash -254947755, now seen corresponding path program 218 times [2021-08-06 14:36:43,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:43,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899910250] [2021-08-06 14:36:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:43,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:43,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:43,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899910250] [2021-08-06 14:36:43,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899910250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:43,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255763990] [2021-08-06 14:36:43,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:36:43,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:43,724 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:43,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-06 14:36:49,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:36:49,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:49,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:49,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:36:49,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:36:49,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:49,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:36:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:49,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255763990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:49,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:49,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:36:49,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444991582] [2021-08-06 14:36:49,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:36:49,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:36:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:36:49,516 INFO L87 Difference]: Start difference. First operand 684 states and 1958 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:50,282 INFO L93 Difference]: Finished difference Result 854 states and 2242 transitions. [2021-08-06 14:36:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 14:36:50,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:50,283 INFO L225 Difference]: With dead ends: 854 [2021-08-06 14:36:50,283 INFO L226 Difference]: Without dead ends: 854 [2021-08-06 14:36:50,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 14:36:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-08-06 14:36:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 681. [2021-08-06 14:36:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 2.8779411764705882) internal successors, (1957), 680 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1957 transitions. [2021-08-06 14:36:50,291 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1957 transitions. Word has length 17 [2021-08-06 14:36:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:50,291 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1957 transitions. [2021-08-06 14:36:50,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1957 transitions. [2021-08-06 14:36:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:50,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:50,292 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:50,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2021-08-06 14:36:50,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:50,506 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:50,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1299101369, now seen corresponding path program 219 times [2021-08-06 14:36:50,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:50,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758949041] [2021-08-06 14:36:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:50,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:50,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:50,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758949041] [2021-08-06 14:36:50,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758949041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:50,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275120744] [2021-08-06 14:36:50,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:36:50,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:50,654 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:50,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-06 14:36:56,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:36:56,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:36:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:56,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:56,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:36:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:36:56,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:36:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:56,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275120744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:56,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:56,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:36:56,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377536411] [2021-08-06 14:36:56,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:36:56,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:36:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:36:56,408 INFO L87 Difference]: Start difference. First operand 681 states and 1957 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:57,056 INFO L93 Difference]: Finished difference Result 769 states and 2073 transitions. [2021-08-06 14:36:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 14:36:57,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:36:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:57,057 INFO L225 Difference]: With dead ends: 769 [2021-08-06 14:36:57,057 INFO L226 Difference]: Without dead ends: 763 [2021-08-06 14:36:57,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:36:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-08-06 14:36:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 684. [2021-08-06 14:36:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.8711566617862374) internal successors, (1961), 683 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1961 transitions. [2021-08-06 14:36:57,065 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1961 transitions. Word has length 17 [2021-08-06 14:36:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:57,065 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1961 transitions. [2021-08-06 14:36:57,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1961 transitions. [2021-08-06 14:36:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:36:57,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:57,065 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:57,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:57,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-06 14:36:57,285 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:36:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash -15305417, now seen corresponding path program 220 times [2021-08-06 14:36:57,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:57,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677730731] [2021-08-06 14:36:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:57,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:36:57,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:57,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677730731] [2021-08-06 14:36:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677730731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:57,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094378689] [2021-08-06 14:36:57,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:36:57,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:57,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:57,447 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:57,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-06 14:37:02,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:37:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:03,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:03,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-06 14:37:03,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:03,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-06 14:37:03,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:03,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-06 14:37:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:03,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094378689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:03,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:03,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:37:03,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142192347] [2021-08-06 14:37:03,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:37:03,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:37:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:37:03,251 INFO L87 Difference]: Start difference. First operand 684 states and 1961 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:04,058 INFO L93 Difference]: Finished difference Result 852 states and 2254 transitions. [2021-08-06 14:37:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:37:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:37:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:04,060 INFO L225 Difference]: With dead ends: 852 [2021-08-06 14:37:04,060 INFO L226 Difference]: Without dead ends: 852 [2021-08-06 14:37:04,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:37:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-06 14:37:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 690. [2021-08-06 14:37:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.8882438316400583) internal successors, (1990), 689 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1990 transitions. [2021-08-06 14:37:04,068 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1990 transitions. Word has length 17 [2021-08-06 14:37:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:04,068 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1990 transitions. [2021-08-06 14:37:04,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1990 transitions. [2021-08-06 14:37:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:04,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:04,069 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:04,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:04,297 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -935006125, now seen corresponding path program 221 times [2021-08-06 14:37:04,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:04,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286205356] [2021-08-06 14:37:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:04,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:04,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:04,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286205356] [2021-08-06 14:37:04,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286205356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:04,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210299090] [2021-08-06 14:37:04,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:37:04,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:04,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:04,472 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:04,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-06 14:37:09,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:37:09,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:09,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:10,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:10,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:37:10,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:10,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:37:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:10,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210299090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:10,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:10,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:37:10,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146242349] [2021-08-06 14:37:10,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:37:10,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:37:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:37:10,268 INFO L87 Difference]: Start difference. First operand 690 states and 1990 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:10,882 INFO L93 Difference]: Finished difference Result 754 states and 2078 transitions. [2021-08-06 14:37:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:37:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:37:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:10,884 INFO L225 Difference]: With dead ends: 754 [2021-08-06 14:37:10,884 INFO L226 Difference]: Without dead ends: 748 [2021-08-06 14:37:10,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:37:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-08-06 14:37:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 691. [2021-08-06 14:37:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 2.8797101449275364) internal successors, (1987), 690 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1987 transitions. [2021-08-06 14:37:10,891 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1987 transitions. Word has length 17 [2021-08-06 14:37:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:10,891 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1987 transitions. [2021-08-06 14:37:10,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1987 transitions. [2021-08-06 14:37:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:10,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:10,892 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:10,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:11,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-06 14:37:11,113 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -7575019, now seen corresponding path program 222 times [2021-08-06 14:37:11,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:11,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793521465] [2021-08-06 14:37:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:11,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:11,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:11,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793521465] [2021-08-06 14:37:11,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793521465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:11,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154244600] [2021-08-06 14:37:11,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:37:11,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:11,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:11,266 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:11,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-06 14:37:16,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:37:16,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:16,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:16,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:16,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:37:16,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:16,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:37:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:17,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154244600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:17,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:17,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:37:17,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637243546] [2021-08-06 14:37:17,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:37:17,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:17,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:37:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:37:17,101 INFO L87 Difference]: Start difference. First operand 691 states and 1987 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:17,670 INFO L93 Difference]: Finished difference Result 856 states and 2218 transitions. [2021-08-06 14:37:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:37:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:37:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:17,671 INFO L225 Difference]: With dead ends: 856 [2021-08-06 14:37:17,671 INFO L226 Difference]: Without dead ends: 855 [2021-08-06 14:37:17,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:37:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-08-06 14:37:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 678. [2021-08-06 14:37:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 2.862629246676514) internal successors, (1938), 677 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1938 transitions. [2021-08-06 14:37:17,679 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1938 transitions. Word has length 17 [2021-08-06 14:37:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:17,679 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1938 transitions. [2021-08-06 14:37:17,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1938 transitions. [2021-08-06 14:37:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:17,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:17,680 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:17,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:17,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-06 14:37:17,901 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash 794041209, now seen corresponding path program 223 times [2021-08-06 14:37:17,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:17,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608946297] [2021-08-06 14:37:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:17,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:18,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:18,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608946297] [2021-08-06 14:37:18,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608946297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:18,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030365907] [2021-08-06 14:37:18,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:37:18,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:18,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:18,063 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:18,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-06 14:37:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:23,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:23,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:23,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:37:23,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:37:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:23,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030365907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:23,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:23,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:37:23,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575084390] [2021-08-06 14:37:23,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:37:23,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:23,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:37:23,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:37:23,890 INFO L87 Difference]: Start difference. First operand 678 states and 1938 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:24,458 INFO L93 Difference]: Finished difference Result 766 states and 2077 transitions. [2021-08-06 14:37:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:37:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:37:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:24,460 INFO L225 Difference]: With dead ends: 766 [2021-08-06 14:37:24,460 INFO L226 Difference]: Without dead ends: 761 [2021-08-06 14:37:24,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 570.2ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:37:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-08-06 14:37:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 682. [2021-08-06 14:37:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.8604992657856094) internal successors, (1948), 681 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1948 transitions. [2021-08-06 14:37:24,468 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1948 transitions. Word has length 17 [2021-08-06 14:37:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:24,468 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 1948 transitions. [2021-08-06 14:37:24,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1948 transitions. [2021-08-06 14:37:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:24,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:24,469 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:24,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:24,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:24,669 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:24,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1782582381, now seen corresponding path program 224 times [2021-08-06 14:37:24,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:24,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277459521] [2021-08-06 14:37:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:24,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:24,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:24,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277459521] [2021-08-06 14:37:24,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277459521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:24,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613781212] [2021-08-06 14:37:24,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:37:24,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:24,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:24,843 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:24,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-06 14:37:30,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:37:30,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:30,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:30,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:37:30,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:30,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:37:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:30,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613781212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:30,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:30,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:37:30,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672402239] [2021-08-06 14:37:30,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:37:30,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:37:30,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:37:30,647 INFO L87 Difference]: Start difference. First operand 682 states and 1948 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:31,018 INFO L93 Difference]: Finished difference Result 755 states and 2061 transitions. [2021-08-06 14:37:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:37:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:37:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:31,019 INFO L225 Difference]: With dead ends: 755 [2021-08-06 14:37:31,019 INFO L226 Difference]: Without dead ends: 755 [2021-08-06 14:37:31,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:37:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-08-06 14:37:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 669. [2021-08-06 14:37:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.8502994011976046) internal successors, (1904), 668 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1904 transitions. [2021-08-06 14:37:31,026 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1904 transitions. Word has length 17 [2021-08-06 14:37:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:31,026 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1904 transitions. [2021-08-06 14:37:31,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1904 transitions. [2021-08-06 14:37:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:31,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:31,027 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:31,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:31,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:31,249 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash 505854579, now seen corresponding path program 225 times [2021-08-06 14:37:31,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:31,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709656142] [2021-08-06 14:37:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:31,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:37:31,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:31,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709656142] [2021-08-06 14:37:31,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709656142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:31,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413881771] [2021-08-06 14:37:31,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:37:31,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:31,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:31,472 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:31,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-06 14:37:36,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:37:36,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:36,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:36,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:37,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:37,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:37:37,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:37,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:37:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413881771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:37,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:37,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 14:37:37,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168361049] [2021-08-06 14:37:37,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:37:37,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:37,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:37:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:37:37,274 INFO L87 Difference]: Start difference. First operand 669 states and 1904 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:37,892 INFO L93 Difference]: Finished difference Result 699 states and 1953 transitions. [2021-08-06 14:37:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:37:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:37:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:37,893 INFO L225 Difference]: With dead ends: 699 [2021-08-06 14:37:37,893 INFO L226 Difference]: Without dead ends: 695 [2021-08-06 14:37:37,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:37:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-08-06 14:37:37,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 672. [2021-08-06 14:37:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 2.8450074515648285) internal successors, (1909), 671 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1909 transitions. [2021-08-06 14:37:37,901 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1909 transitions. Word has length 17 [2021-08-06 14:37:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:37,901 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1909 transitions. [2021-08-06 14:37:37,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1909 transitions. [2021-08-06 14:37:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:37,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:37,902 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:37,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2021-08-06 14:37:38,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:38,103 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:38,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1517986223, now seen corresponding path program 226 times [2021-08-06 14:37:38,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:38,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074684919] [2021-08-06 14:37:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:38,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:38,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:38,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074684919] [2021-08-06 14:37:38,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074684919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:38,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878063269] [2021-08-06 14:37:38,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:37:38,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:38,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:38,236 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:38,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-06 14:37:43,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:37:43,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:43,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:43,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:43,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:37:43,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:43,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:37:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:43,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878063269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:43,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:43,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-06 14:37:43,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167718904] [2021-08-06 14:37:43,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:43,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:43,999 INFO L87 Difference]: Start difference. First operand 672 states and 1909 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:44,313 INFO L93 Difference]: Finished difference Result 807 states and 2159 transitions. [2021-08-06 14:37:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:37:44,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:37:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:44,314 INFO L225 Difference]: With dead ends: 807 [2021-08-06 14:37:44,314 INFO L226 Difference]: Without dead ends: 807 [2021-08-06 14:37:44,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:37:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-08-06 14:37:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 694. [2021-08-06 14:37:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.865800865800866) internal successors, (1986), 693 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1986 transitions. [2021-08-06 14:37:44,322 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1986 transitions. Word has length 17 [2021-08-06 14:37:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:44,322 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1986 transitions. [2021-08-06 14:37:44,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1986 transitions. [2021-08-06 14:37:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:44,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:44,323 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:44,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:44,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-08-06 14:37:44,524 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:44,524 INFO L82 PathProgramCache]: Analyzing trace with hash -716369995, now seen corresponding path program 227 times [2021-08-06 14:37:44,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:44,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134315013] [2021-08-06 14:37:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:44,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:44,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:44,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134315013] [2021-08-06 14:37:44,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134315013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:44,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85948028] [2021-08-06 14:37:44,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:37:44,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:44,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:44,669 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:44,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-06 14:37:50,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:37:50,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:50,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:50,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:37:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:50,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:37:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:50,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85948028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:50,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:50,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-06 14:37:50,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031103333] [2021-08-06 14:37:50,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:50,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:50,460 INFO L87 Difference]: Start difference. First operand 694 states and 1986 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:50,781 INFO L93 Difference]: Finished difference Result 790 states and 2149 transitions. [2021-08-06 14:37:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 14:37:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:37:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:50,782 INFO L225 Difference]: With dead ends: 790 [2021-08-06 14:37:50,782 INFO L226 Difference]: Without dead ends: 784 [2021-08-06 14:37:50,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:37:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-08-06 14:37:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 700. [2021-08-06 14:37:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.866952789699571) internal successors, (2004), 699 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2004 transitions. [2021-08-06 14:37:50,790 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2004 transitions. Word has length 17 [2021-08-06 14:37:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:50,790 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2004 transitions. [2021-08-06 14:37:50,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2004 transitions. [2021-08-06 14:37:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:50,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:50,791 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:50,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:51,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:51,013 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1001973711, now seen corresponding path program 228 times [2021-08-06 14:37:51,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:51,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126657378] [2021-08-06 14:37:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:51,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:51,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:51,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126657378] [2021-08-06 14:37:51,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126657378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:51,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207128347] [2021-08-06 14:37:51,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:37:51,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:51,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:51,254 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:51,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-06 14:37:56,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:37:56,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:37:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:56,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:56,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:37:56,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:37:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:37:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:57,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207128347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:57,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:57,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-06 14:37:57,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663735473] [2021-08-06 14:37:57,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:37:57,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:37:57,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:37:57,006 INFO L87 Difference]: Start difference. First operand 700 states and 2004 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:57,227 INFO L93 Difference]: Finished difference Result 783 states and 2134 transitions. [2021-08-06 14:37:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:37:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:37:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:57,229 INFO L225 Difference]: With dead ends: 783 [2021-08-06 14:37:57,229 INFO L226 Difference]: Without dead ends: 783 [2021-08-06 14:37:57,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:37:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-08-06 14:37:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 695. [2021-08-06 14:37:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.857348703170029) internal successors, (1983), 694 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1983 transitions. [2021-08-06 14:37:57,236 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1983 transitions. Word has length 17 [2021-08-06 14:37:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:57,236 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1983 transitions. [2021-08-06 14:37:57,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:37:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1983 transitions. [2021-08-06 14:37:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:37:57,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:57,237 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:57,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2021-08-06 14:37:57,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:57,461 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:37:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash -708639597, now seen corresponding path program 229 times [2021-08-06 14:37:57,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:57,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212266279] [2021-08-06 14:37:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:57,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:37:57,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:57,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212266279] [2021-08-06 14:37:57,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212266279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:57,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143196694] [2021-08-06 14:37:57,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:37:57,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:57,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:57,548 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:57,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-06 14:38:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:38:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:03,289 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:38:03,290 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 41 treesize of output 38 [2021-08-06 14:38:03,293 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:38:03,293 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 34 treesize of output 29 [2021-08-06 14:38:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:03,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143196694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:03,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:03,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-06 14:38:03,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735024467] [2021-08-06 14:38:03,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:03,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:03,333 INFO L87 Difference]: Start difference. First operand 695 states and 1983 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:03,487 INFO L93 Difference]: Finished difference Result 791 states and 2150 transitions. [2021-08-06 14:38:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:38:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:38:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:03,488 INFO L225 Difference]: With dead ends: 791 [2021-08-06 14:38:03,489 INFO L226 Difference]: Without dead ends: 791 [2021-08-06 14:38:03,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-08-06 14:38:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 695. [2021-08-06 14:38:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.857348703170029) internal successors, (1983), 694 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1983 transitions. [2021-08-06 14:38:03,496 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1983 transitions. Word has length 17 [2021-08-06 14:38:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:03,496 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1983 transitions. [2021-08-06 14:38:03,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1983 transitions. [2021-08-06 14:38:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:38:03,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:03,497 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:03,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2021-08-06 14:38:03,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:03,725 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:38:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:03,725 INFO L82 PathProgramCache]: Analyzing trace with hash -561657485, now seen corresponding path program 230 times [2021-08-06 14:38:03,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:03,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235901199] [2021-08-06 14:38:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:03,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:38:03,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:03,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235901199] [2021-08-06 14:38:03,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235901199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:03,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285047791] [2021-08-06 14:38:03,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:38:03,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:03,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:03,812 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:38:03,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-06 14:38:09,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:38:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:38:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:09,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:38:09,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:38:09,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:38:09,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:38:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:10,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285047791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:10,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:10,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-06 14:38:10,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652028723] [2021-08-06 14:38:10,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:10,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:10,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:10,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:10,028 INFO L87 Difference]: Start difference. First operand 695 states and 1983 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:10,395 INFO L93 Difference]: Finished difference Result 734 states and 2044 transitions. [2021-08-06 14:38:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:38:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:38:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:10,396 INFO L225 Difference]: With dead ends: 734 [2021-08-06 14:38:10,396 INFO L226 Difference]: Without dead ends: 730 [2021-08-06 14:38:10,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:38:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-06 14:38:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 693. [2021-08-06 14:38:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 2.8554913294797686) internal successors, (1976), 692 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1976 transitions. [2021-08-06 14:38:10,404 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1976 transitions. Word has length 17 [2021-08-06 14:38:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:10,404 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1976 transitions. [2021-08-06 14:38:10,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1976 transitions. [2021-08-06 14:38:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:38:10,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:10,405 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:10,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:10,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-06 14:38:10,625 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:38:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1167389849, now seen corresponding path program 231 times [2021-08-06 14:38:10,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:10,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428718753] [2021-08-06 14:38:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:10,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:38:10,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:10,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428718753] [2021-08-06 14:38:10,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428718753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:10,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840838977] [2021-08-06 14:38:10,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:38:10,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:10,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:10,755 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:38:10,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-06 14:38:16,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:38:16,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:16,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:38:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:16,568 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:38:16,569 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 43 treesize of output 40 [2021-08-06 14:38:16,573 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:38:16,573 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 34 [2021-08-06 14:38:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:16,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840838977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:16,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:16,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-08-06 14:38:16,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486547315] [2021-08-06 14:38:16,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:38:16,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:38:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:38:16,625 INFO L87 Difference]: Start difference. First operand 693 states and 1976 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:16,872 INFO L93 Difference]: Finished difference Result 709 states and 2002 transitions. [2021-08-06 14:38:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:38:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:38:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:16,873 INFO L225 Difference]: With dead ends: 709 [2021-08-06 14:38:16,873 INFO L226 Difference]: Without dead ends: 701 [2021-08-06 14:38:16,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:38:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-08-06 14:38:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 690. [2021-08-06 14:38:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.8548621190130623) internal successors, (1967), 689 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1967 transitions. [2021-08-06 14:38:16,880 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1967 transitions. Word has length 17 [2021-08-06 14:38:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:16,880 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1967 transitions. [2021-08-06 14:38:16,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1967 transitions. [2021-08-06 14:38:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:38:16,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:16,881 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:16,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:17,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-08-06 14:38:17,107 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:38:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:17,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1096093291, now seen corresponding path program 232 times [2021-08-06 14:38:17,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:17,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492562882] [2021-08-06 14:38:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:17,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:17,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:17,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492562882] [2021-08-06 14:38:17,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492562882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:17,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716119852] [2021-08-06 14:38:17,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:38:17,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:17,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:17,226 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:38:17,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-06 14:38:22,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:38:22,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:38:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 14:38:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:38:23,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:38:23,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-06 14:38:23,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:38:23,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-06 14:38:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:23,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716119852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:23,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:38:23,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 14:38:23,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102046975] [2021-08-06 14:38:23,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:38:23,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:38:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:38:23,202 INFO L87 Difference]: Start difference. First operand 690 states and 1967 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:23,454 INFO L93 Difference]: Finished difference Result 854 states and 2269 transitions. [2021-08-06 14:38:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:38:23,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:38:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:23,455 INFO L225 Difference]: With dead ends: 854 [2021-08-06 14:38:23,455 INFO L226 Difference]: Without dead ends: 854 [2021-08-06 14:38:23,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:38:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-08-06 14:38:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 711. [2021-08-06 14:38:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 2.8746478873239436) internal successors, (2041), 710 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2041 transitions. [2021-08-06 14:38:23,463 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2041 transitions. Word has length 17 [2021-08-06 14:38:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:23,463 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2041 transitions. [2021-08-06 14:38:23,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2041 transitions. [2021-08-06 14:38:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:38:23,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:23,464 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:38:23,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2021-08-06 14:38:23,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-06 14:38:23,689 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 14:38:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash -294477063, now seen corresponding path program 233 times [2021-08-06 14:38:23,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:23,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989202301] [2021-08-06 14:38:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:23,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:38:23,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:23,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989202301] [2021-08-06 14:38:23,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989202301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:38:23,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739701662] [2021-08-06 14:38:23,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:38:23,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:38:23,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:23,800 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:38:23,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 14:38:25,114 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:38:25,114 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:38:26,147 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:38:26,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2021-08-06 14:38:26,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-06 14:38:26,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-06 14:38:26,347 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while executing Executor. [2021-08-06 14:38:26,349 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:38:26,349 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:38:26,352 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:38:26,352 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:38:26,353 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:38:26 BasicIcfg [2021-08-06 14:38:26,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:38:26,354 INFO L168 Benchmark]: Toolchain (without parser) took 898472.61 ms. Allocated memory was 187.7 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 169.2 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-06 14:38:26,354 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 187.7 MB. Free memory is still 170.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:38:26,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.53 ms. Allocated memory is still 187.7 MB. Free memory was 169.0 MB in the beginning and 167.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 14:38:26,354 INFO L168 Benchmark]: Boogie Preprocessor took 26.50 ms. Allocated memory is still 187.7 MB. Free memory was 167.5 MB in the beginning and 166.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:38:26,354 INFO L168 Benchmark]: RCFGBuilder took 239.87 ms. Allocated memory is still 187.7 MB. Free memory was 166.5 MB in the beginning and 149.1 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-08-06 14:38:26,354 INFO L168 Benchmark]: TraceAbstraction took 898176.37 ms. Allocated memory was 187.7 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 148.7 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-06 14:38:26,354 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 187.7 MB. Free memory is still 170.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.53 ms. Allocated memory is still 187.7 MB. Free memory was 169.0 MB in the beginning and 167.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.50 ms. Allocated memory is still 187.7 MB. Free memory was 167.5 MB in the beginning and 166.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 239.87 ms. Allocated memory is still 187.7 MB. Free memory was 166.5 MB in the beginning and 149.1 MB in the end (delta: 17.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 898176.37 ms. Allocated memory was 187.7 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 148.7 MB in the beginning and 1.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.8 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while executing Executor. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while executing Executor. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 4,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 898121.6ms, OverallIterations: 247, TraceHistogramMax: 4, EmptinessCheckTime: 115.2ms, AutomataDifference: 97753.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6036 SDtfs, 12192 SDslu, 38837 SDs, 0 SdLazy, 80206 SolverSat, 3112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33140.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7697 GetRequests, 2303 SyntacticMatches, 272 SemanticMatches, 5122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22495 ImplicationChecksByTransitivity, 98748.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=711occurred in iteration=246, InterpolantAutomatonStates: 4390, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1117.3ms AutomataMinimizationTime, 246 MinimizatonAttempts, 16496 StatesRemovedByMinimization, 246 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 871.3ms SsaConstructionTime, 4361.6ms SatisfiabilityAnalysisTime, 126294.8ms InterpolantComputationTime, 7302 NumberOfCodeBlocks, 7302 NumberOfCodeBlocksAsserted, 794 NumberOfCheckSat, 6820 ConstructedInterpolants, 165 QuantifiedInterpolants, 92180 SizeOfPredicates, 1397 NumberOfNonLiveVariables, 16504 ConjunctsInSsa, 5353 ConjunctsInUnsatCore, 482 InterpolantComputations, 10 PerfectInterpolantSequences, 805/4848 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