/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:49:24,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:49:24,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:49:24,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:49:24,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:49:24,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:49:24,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:49:24,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:49:24,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:49:24,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:49:24,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:49:24,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-21 18:49:24,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 18:49:24,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:49:24,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:49:24,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:49:24,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:49:24,996 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:49:24,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:49:24,996 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:49:24,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:49:24,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:49:24,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:49:24,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:49:24,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:49:24,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:49:24,998 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:49:24,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:49:24,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:49:24,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:49:24,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:49:24,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:49:24,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:49:24,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:49:24,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:49:24,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:49:24,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:49:25,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:49:25,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:49:25,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:49:25,000 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:49:25,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:49:25,001 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:49:25,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:49:25,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:49:25,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:49:25,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:49:25,292 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:49:25,293 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:49:25,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-08-21 18:49:25,294 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-08-21 18:49:25,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:49:25,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:49:25,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:49:25,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:49:25,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:49:25,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:49:25,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:49:25,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:49:25,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:49:25,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:49:25,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:49:25,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:49:25,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:49:25,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/1) ... [2021-08-21 18:49:25,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:49:25,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:25,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 18:49:25,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 18:49:25,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:49:25,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:49:25,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:49:25,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:49:25,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:49:25,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:49:25,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:49:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:49:25,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:49:25,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 18:49:25,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 18:49:25,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 18:49:25,436 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:49:25,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:49:25,600 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:49:25,602 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:49:25 BoogieIcfgContainer [2021-08-21 18:49:25,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:49:25,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:49:25,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:49:25,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:49:25,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:49:25" (1/2) ... [2021-08-21 18:49:25,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161ff53b and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:49:25, skipping insertion in model container [2021-08-21 18:49:25,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:49:25" (2/2) ... [2021-08-21 18:49:25,607 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-08-21 18:49:25,610 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:49:25,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:49:25,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:49:25,610 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:49:25,642 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 18:49:25,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:49:25,673 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:49:25,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 18:49:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 296 states have (on average 2.016891891891892) internal successors, (597), 428 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:49:25,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:25,932 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:25,933 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:25,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1509391448, now seen corresponding path program 1 times [2021-08-21 18:49:25,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:25,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222495715] [2021-08-21 18:49:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:25,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:26,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:26,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222495715] [2021-08-21 18:49:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222495715] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:49:26,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:49:26,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:49:26,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887975505] [2021-08-21 18:49:26,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:49:26,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:49:26,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:49:26,068 INFO L87 Difference]: Start difference. First operand has 429 states, 296 states have (on average 2.016891891891892) internal successors, (597), 428 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:26,118 INFO L93 Difference]: Finished difference Result 529 states and 742 transitions. [2021-08-21 18:49:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:49:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:49:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:26,126 INFO L225 Difference]: With dead ends: 529 [2021-08-21 18:49:26,126 INFO L226 Difference]: Without dead ends: 90 [2021-08-21 18:49:26,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:49:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-21 18:49:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2021-08-21 18:49:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2021-08-21 18:49:26,161 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 23 [2021-08-21 18:49:26,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:26,161 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2021-08-21 18:49:26,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2021-08-21 18:49:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:49:26,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:26,163 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:26,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:49:26,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:26,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1246787406, now seen corresponding path program 2 times [2021-08-21 18:49:26,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:26,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844889270] [2021-08-21 18:49:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:26,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:26,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:26,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844889270] [2021-08-21 18:49:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844889270] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:49:26,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:49:26,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:49:26,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657860246] [2021-08-21 18:49:26,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:49:26,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:49:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:49:26,201 INFO L87 Difference]: Start difference. First operand 72 states and 153 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:26,216 INFO L93 Difference]: Finished difference Result 72 states and 151 transitions. [2021-08-21 18:49:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:49:26,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:49:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:26,218 INFO L225 Difference]: With dead ends: 72 [2021-08-21 18:49:26,218 INFO L226 Difference]: Without dead ends: 68 [2021-08-21 18:49:26,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:49:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-21 18:49:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-08-21 18:49:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 141 transitions. [2021-08-21 18:49:26,230 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 141 transitions. Word has length 23 [2021-08-21 18:49:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:26,230 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 141 transitions. [2021-08-21 18:49:26,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 141 transitions. [2021-08-21 18:49:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:49:26,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:26,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:26,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:49:26,232 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:26,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1841577178, now seen corresponding path program 1 times [2021-08-21 18:49:26,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:26,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228129259] [2021-08-21 18:49:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:26,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:26,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:26,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228129259] [2021-08-21 18:49:26,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228129259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:26,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394430619] [2021-08-21 18:49:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:26,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:26,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:26,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:49:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-21 18:49:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:26,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394430619] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:49:26,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:49:26,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-08-21 18:49:26,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080788822] [2021-08-21 18:49:26,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:49:26,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:26,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:49:26,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:49:26,469 INFO L87 Difference]: Start difference. First operand 68 states and 141 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-21 18:49:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:26,481 INFO L93 Difference]: Finished difference Result 68 states and 139 transitions. [2021-08-21 18:49:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:49:26,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 25 [2021-08-21 18:49:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:26,482 INFO L225 Difference]: With dead ends: 68 [2021-08-21 18:49:26,482 INFO L226 Difference]: Without dead ends: 67 [2021-08-21 18:49:26,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:49:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-21 18:49:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-08-21 18:49:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 66 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) [2021-08-21 18:49:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 137 transitions. [2021-08-21 18:49:26,489 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 137 transitions. Word has length 25 [2021-08-21 18:49:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:26,489 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 137 transitions. [2021-08-21 18:49:26,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-21 18:49:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 137 transitions. [2021-08-21 18:49:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:49:26,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:26,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:26,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:26,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:26,707 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:26,707 INFO L82 PathProgramCache]: Analyzing trace with hash -358442240, now seen corresponding path program 2 times [2021-08-21 18:49:26,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:26,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007830964] [2021-08-21 18:49:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:26,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:26,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:26,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007830964] [2021-08-21 18:49:26,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007830964] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:49:26,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:49:26,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:49:26,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230472602] [2021-08-21 18:49:26,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:49:26,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:49:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:49:26,752 INFO L87 Difference]: Start difference. First operand 67 states and 137 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-21 18:49:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:26,767 INFO L93 Difference]: Finished difference Result 87 states and 177 transitions. [2021-08-21 18:49:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:49:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 25 [2021-08-21 18:49:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:26,769 INFO L225 Difference]: With dead ends: 87 [2021-08-21 18:49:26,769 INFO L226 Difference]: Without dead ends: 87 [2021-08-21 18:49:26,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:49:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-21 18:49:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2021-08-21 18:49:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 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) [2021-08-21 18:49:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 139 transitions. [2021-08-21 18:49:26,772 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 139 transitions. Word has length 25 [2021-08-21 18:49:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:26,772 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 139 transitions. [2021-08-21 18:49:26,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) [2021-08-21 18:49:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 139 transitions. [2021-08-21 18:49:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 18:49:26,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:26,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:26,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:49:26,773 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash 408282502, now seen corresponding path program 1 times [2021-08-21 18:49:26,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:26,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27651172] [2021-08-21 18:49:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:26,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:26,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:26,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27651172] [2021-08-21 18:49:26,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27651172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:26,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299211709] [2021-08-21 18:49:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:26,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:26,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:26,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:26,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:49:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:26,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:49:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:26,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299211709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:26,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:26,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:49:26,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124013995] [2021-08-21 18:49:26,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:49:26,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:49:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:49:26,959 INFO L87 Difference]: Start difference. First operand 68 states and 139 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-08-21 18:49:26,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:26,973 INFO L93 Difference]: Finished difference Result 92 states and 193 transitions. [2021-08-21 18:49:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:49:26,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 27 [2021-08-21 18:49:26,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:26,974 INFO L225 Difference]: With dead ends: 92 [2021-08-21 18:49:26,974 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 18:49:26,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:49:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 18:49:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2021-08-21 18:49:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.12) internal successors, (159), 75 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 159 transitions. [2021-08-21 18:49:26,977 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 159 transitions. Word has length 27 [2021-08-21 18:49:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:26,978 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 159 transitions. [2021-08-21 18:49:26,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-08-21 18:49:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 159 transitions. [2021-08-21 18:49:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:49:26,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:26,978 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:26,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 18:49:27,192 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 [2021-08-21 18:49:27,193 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash 834745860, now seen corresponding path program 2 times [2021-08-21 18:49:27,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:27,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108304573] [2021-08-21 18:49:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:27,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:49:27,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:27,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108304573] [2021-08-21 18:49:27,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108304573] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:49:27,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:49:27,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:49:27,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598477876] [2021-08-21 18:49:27,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:49:27,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:49:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:49:27,250 INFO L87 Difference]: Start difference. First operand 76 states and 159 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-08-21 18:49:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:27,269 INFO L93 Difference]: Finished difference Result 123 states and 253 transitions. [2021-08-21 18:49:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:49:27,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 29 [2021-08-21 18:49:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:27,270 INFO L225 Difference]: With dead ends: 123 [2021-08-21 18:49:27,270 INFO L226 Difference]: Without dead ends: 123 [2021-08-21 18:49:27,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:49:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-21 18:49:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 78. [2021-08-21 18:49:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-08-21 18:49:27,275 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 29 [2021-08-21 18:49:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:27,275 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-08-21 18:49:27,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-08-21 18:49:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-08-21 18:49:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:49:27,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:27,276 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:27,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 18:49:27,276 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash -542843902, now seen corresponding path program 3 times [2021-08-21 18:49:27,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:27,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097986723] [2021-08-21 18:49:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:27,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:27,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:27,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097986723] [2021-08-21 18:49:27,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097986723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:27,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754231627] [2021-08-21 18:49:27,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:27,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:27,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:27,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:27,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:49:27,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:49:27,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 18:49:27,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:27,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754231627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:27,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:27,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 18:49:27,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196877680] [2021-08-21 18:49:27,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:27,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:27,786 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-21 18:49:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:28,014 INFO L93 Difference]: Finished difference Result 353 states and 788 transitions. [2021-08-21 18:49:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:49:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:49:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:28,017 INFO L225 Difference]: With dead ends: 353 [2021-08-21 18:49:28,017 INFO L226 Difference]: Without dead ends: 344 [2021-08-21 18:49:28,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:49:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-21 18:49:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 142. [2021-08-21 18:49:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.4893617021276597) internal successors, (351), 141 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 351 transitions. [2021-08-21 18:49:28,024 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 351 transitions. Word has length 31 [2021-08-21 18:49:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:28,024 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 351 transitions. [2021-08-21 18:49:28,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-08-21 18:49:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 351 transitions. [2021-08-21 18:49:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:49:28,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:28,030 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:28,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:28,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:28,250 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:28,251 INFO L82 PathProgramCache]: Analyzing trace with hash 401526852, now seen corresponding path program 4 times [2021-08-21 18:49:28,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:28,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415395490] [2021-08-21 18:49:28,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:28,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:49:28,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:28,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415395490] [2021-08-21 18:49:28,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415395490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:28,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749473170] [2021-08-21 18:49:28,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:28,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:28,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:28,309 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:28,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:49:28,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:28,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:28,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:49:28,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749473170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:28,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:28,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 18:49:28,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909462043] [2021-08-21 18:49:28,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:49:28,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:49:28,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:49:28,545 INFO L87 Difference]: Start difference. First operand 142 states and 351 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:28,779 INFO L93 Difference]: Finished difference Result 587 states and 1421 transitions. [2021-08-21 18:49:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:49:28,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:49:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:28,783 INFO L225 Difference]: With dead ends: 587 [2021-08-21 18:49:28,783 INFO L226 Difference]: Without dead ends: 587 [2021-08-21 18:49:28,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:49:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-21 18:49:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 245. [2021-08-21 18:49:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.778688524590164) internal successors, (678), 244 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 678 transitions. [2021-08-21 18:49:28,793 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 678 transitions. Word has length 33 [2021-08-21 18:49:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:28,793 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 678 transitions. [2021-08-21 18:49:28,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 678 transitions. [2021-08-21 18:49:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:49:28,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:28,794 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:28,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:29,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:29,009 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1825907584, now seen corresponding path program 5 times [2021-08-21 18:49:29,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:29,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482189248] [2021-08-21 18:49:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:29,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:29,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:29,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482189248] [2021-08-21 18:49:29,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482189248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:29,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668950490] [2021-08-21 18:49:29,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:29,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:29,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:29,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:29,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:49:29,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:49:29,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:29,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:29,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:29,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668950490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:29,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:29,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-21 18:49:29,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900427783] [2021-08-21 18:49:29,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:29,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:29,344 INFO L87 Difference]: Start difference. First operand 245 states and 678 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:29,568 INFO L93 Difference]: Finished difference Result 487 states and 1266 transitions. [2021-08-21 18:49:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:49:29,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:49:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:29,572 INFO L225 Difference]: With dead ends: 487 [2021-08-21 18:49:29,572 INFO L226 Difference]: Without dead ends: 457 [2021-08-21 18:49:29,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-08-21 18:49:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 343. [2021-08-21 18:49:29,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.789473684210526) internal successors, (954), 342 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 954 transitions. [2021-08-21 18:49:29,581 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 954 transitions. Word has length 33 [2021-08-21 18:49:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:29,581 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 954 transitions. [2021-08-21 18:49:29,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 954 transitions. [2021-08-21 18:49:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:49:29,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:29,582 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:29,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:29,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:29,798 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:29,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2144627712, now seen corresponding path program 6 times [2021-08-21 18:49:29,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:29,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640220921] [2021-08-21 18:49:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:29,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:29,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:29,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640220921] [2021-08-21 18:49:29,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640220921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:29,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181427106] [2021-08-21 18:49:29,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:29,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:29,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:29,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:49:29,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:49:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:29,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:30,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181427106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:30,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:30,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 18:49:30,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150141959] [2021-08-21 18:49:30,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:30,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:30,125 INFO L87 Difference]: Start difference. First operand 343 states and 954 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:30,301 INFO L93 Difference]: Finished difference Result 647 states and 1682 transitions. [2021-08-21 18:49:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:49:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:49:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:30,304 INFO L225 Difference]: With dead ends: 647 [2021-08-21 18:49:30,304 INFO L226 Difference]: Without dead ends: 642 [2021-08-21 18:49:30,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-08-21 18:49:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 513. [2021-08-21 18:49:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.732421875) internal successors, (1399), 512 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1399 transitions. [2021-08-21 18:49:30,315 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1399 transitions. Word has length 33 [2021-08-21 18:49:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:30,315 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1399 transitions. [2021-08-21 18:49:30,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1399 transitions. [2021-08-21 18:49:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:49:30,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:30,317 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:30,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:30,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:30,529 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:30,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1137832960, now seen corresponding path program 7 times [2021-08-21 18:49:30,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:30,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319721417] [2021-08-21 18:49:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:30,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:30,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:30,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319721417] [2021-08-21 18:49:30,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319721417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:30,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308090410] [2021-08-21 18:49:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:30,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:30,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:30,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:30,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:49:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:30,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308090410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:30,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:30,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-08-21 18:49:30,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225552478] [2021-08-21 18:49:30,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:30,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:30,874 INFO L87 Difference]: Start difference. First operand 513 states and 1399 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:31,070 INFO L93 Difference]: Finished difference Result 1012 states and 2575 transitions. [2021-08-21 18:49:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:49:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:49:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:31,074 INFO L225 Difference]: With dead ends: 1012 [2021-08-21 18:49:31,074 INFO L226 Difference]: Without dead ends: 995 [2021-08-21 18:49:31,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:49:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-08-21 18:49:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 680. [2021-08-21 18:49:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 2.731958762886598) internal successors, (1855), 679 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1855 transitions. [2021-08-21 18:49:31,089 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1855 transitions. Word has length 33 [2021-08-21 18:49:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:31,089 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1855 transitions. [2021-08-21 18:49:31,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1855 transitions. [2021-08-21 18:49:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:49:31,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:31,091 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:31,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-21 18:49:31,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:31,301 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1066556544, now seen corresponding path program 8 times [2021-08-21 18:49:31,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:31,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830248631] [2021-08-21 18:49:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:31,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:49:31,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:31,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830248631] [2021-08-21 18:49:31,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830248631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:31,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208964894] [2021-08-21 18:49:31,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:49:31,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:31,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:31,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:31,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:49:31,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:49:31,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:31,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:31,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:49:31,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208964894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:31,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:31,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-21 18:49:31,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522155384] [2021-08-21 18:49:31,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:31,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:31,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:31,665 INFO L87 Difference]: Start difference. First operand 680 states and 1855 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:31,982 INFO L93 Difference]: Finished difference Result 1742 states and 4470 transitions. [2021-08-21 18:49:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:49:31,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:49:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:31,989 INFO L225 Difference]: With dead ends: 1742 [2021-08-21 18:49:31,989 INFO L226 Difference]: Without dead ends: 1704 [2021-08-21 18:49:31,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:49:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2021-08-21 18:49:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 839. [2021-08-21 18:49:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 2.7183770883054894) internal successors, (2278), 838 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2278 transitions. [2021-08-21 18:49:32,026 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2278 transitions. Word has length 33 [2021-08-21 18:49:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:32,026 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 2278 transitions. [2021-08-21 18:49:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2278 transitions. [2021-08-21 18:49:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:49:32,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:32,029 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:32,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:32,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 18:49:32,245 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1177043584, now seen corresponding path program 9 times [2021-08-21 18:49:32,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:32,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648186841] [2021-08-21 18:49:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:32,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:32,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:32,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648186841] [2021-08-21 18:49:32,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648186841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:32,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125625309] [2021-08-21 18:49:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:32,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:32,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:32,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:32,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:49:32,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:49:32,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:32,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:32,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:32,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125625309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:32,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:32,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:49:32,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493285807] [2021-08-21 18:49:32,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:49:32,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:49:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:49:32,597 INFO L87 Difference]: Start difference. First operand 839 states and 2278 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:32,854 INFO L93 Difference]: Finished difference Result 2235 states and 5881 transitions. [2021-08-21 18:49:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:49:32,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:49:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:32,863 INFO L225 Difference]: With dead ends: 2235 [2021-08-21 18:49:32,863 INFO L226 Difference]: Without dead ends: 2235 [2021-08-21 18:49:32,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:49:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-08-21 18:49:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1247. [2021-08-21 18:49:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 2.852327447833066) internal successors, (3554), 1246 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 3554 transitions. [2021-08-21 18:49:32,895 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 3554 transitions. Word has length 33 [2021-08-21 18:49:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:32,896 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 3554 transitions. [2021-08-21 18:49:32,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 3554 transitions. [2021-08-21 18:49:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:49:32,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:32,898 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:32,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:33,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:49:33,116 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1506989116, now seen corresponding path program 10 times [2021-08-21 18:49:33,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:33,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064587762] [2021-08-21 18:49:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:33,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:33,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:33,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064587762] [2021-08-21 18:49:33,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064587762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:33,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523727319] [2021-08-21 18:49:33,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:33,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:33,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:33,158 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:33,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:49:33,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:49:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:33,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523727319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:33,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:33,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-08-21 18:49:33,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872005830] [2021-08-21 18:49:33,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:33,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:33,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:33,455 INFO L87 Difference]: Start difference. First operand 1247 states and 3554 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:33,714 INFO L93 Difference]: Finished difference Result 1954 states and 5302 transitions. [2021-08-21 18:49:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:49:33,715 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:49:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:33,722 INFO L225 Difference]: With dead ends: 1954 [2021-08-21 18:49:33,722 INFO L226 Difference]: Without dead ends: 1858 [2021-08-21 18:49:33,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:49:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-08-21 18:49:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1465. [2021-08-21 18:49:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 2.8251366120218577) internal successors, (4136), 1464 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4136 transitions. [2021-08-21 18:49:33,753 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4136 transitions. Word has length 33 [2021-08-21 18:49:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:33,753 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 4136 transitions. [2021-08-21 18:49:33,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4136 transitions. [2021-08-21 18:49:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:49:33,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:33,756 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:33,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:33,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:49:33,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1556678016, now seen corresponding path program 11 times [2021-08-21 18:49:33,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:33,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277961804] [2021-08-21 18:49:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:33,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:34,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:34,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277961804] [2021-08-21 18:49:34,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277961804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:34,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978549677] [2021-08-21 18:49:34,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:34,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:34,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:34,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:34,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:49:34,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:49:34,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:34,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:34,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978549677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:34,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:34,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2021-08-21 18:49:34,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857493997] [2021-08-21 18:49:34,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:49:34,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:49:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:49:34,384 INFO L87 Difference]: Start difference. First operand 1465 states and 4136 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:34,580 INFO L93 Difference]: Finished difference Result 1843 states and 5085 transitions. [2021-08-21 18:49:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:49:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:49:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:34,587 INFO L225 Difference]: With dead ends: 1843 [2021-08-21 18:49:34,588 INFO L226 Difference]: Without dead ends: 1832 [2021-08-21 18:49:34,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:49:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-08-21 18:49:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1449. [2021-08-21 18:49:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.824585635359116) internal successors, (4090), 1448 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4090 transitions. [2021-08-21 18:49:34,616 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4090 transitions. Word has length 33 [2021-08-21 18:49:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:34,616 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 4090 transitions. [2021-08-21 18:49:34,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4090 transitions. [2021-08-21 18:49:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:34,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:34,618 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:34,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:34,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:49:34,835 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash -848144446, now seen corresponding path program 12 times [2021-08-21 18:49:34,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:34,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439663266] [2021-08-21 18:49:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:34,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:35,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:35,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439663266] [2021-08-21 18:49:35,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439663266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:35,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319748554] [2021-08-21 18:49:35,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:35,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:35,012 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:35,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:49:35,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:49:35,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:35,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319748554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:35,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:35,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-21 18:49:35,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028879631] [2021-08-21 18:49:35,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:49:35,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:49:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:49:35,460 INFO L87 Difference]: Start difference. First operand 1449 states and 4090 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:35,678 INFO L93 Difference]: Finished difference Result 2165 states and 5981 transitions. [2021-08-21 18:49:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:49:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:35,686 INFO L225 Difference]: With dead ends: 2165 [2021-08-21 18:49:35,686 INFO L226 Difference]: Without dead ends: 2145 [2021-08-21 18:49:35,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-08-21 18:49:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1699. [2021-08-21 18:49:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 2.904593639575972) internal successors, (4932), 1698 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 4932 transitions. [2021-08-21 18:49:35,719 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 4932 transitions. Word has length 35 [2021-08-21 18:49:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:35,719 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 4932 transitions. [2021-08-21 18:49:35,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 4932 transitions. [2021-08-21 18:49:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:35,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:35,723 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:35,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:35,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:49:35,940 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash 151291970, now seen corresponding path program 13 times [2021-08-21 18:49:35,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:35,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472781809] [2021-08-21 18:49:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:35,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:35,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:35,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472781809] [2021-08-21 18:49:35,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472781809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:35,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902000394] [2021-08-21 18:49:35,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:35,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:35,997 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:35,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:49:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:36,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:36,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902000394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:36,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:36,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:49:36,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705205175] [2021-08-21 18:49:36,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:36,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:36,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:36,348 INFO L87 Difference]: Start difference. First operand 1699 states and 4932 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:36,578 INFO L93 Difference]: Finished difference Result 2871 states and 7815 transitions. [2021-08-21 18:49:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:49:36,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:36,588 INFO L225 Difference]: With dead ends: 2871 [2021-08-21 18:49:36,588 INFO L226 Difference]: Without dead ends: 2871 [2021-08-21 18:49:36,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:49:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-08-21 18:49:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 1710. [2021-08-21 18:49:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.8993563487419545) internal successors, (4955), 1709 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 4955 transitions. [2021-08-21 18:49:36,629 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 4955 transitions. Word has length 35 [2021-08-21 18:49:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:36,629 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 4955 transitions. [2021-08-21 18:49:36,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 4955 transitions. [2021-08-21 18:49:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:36,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:36,633 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:36,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:36,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 18:49:36,849 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash 164362178, now seen corresponding path program 14 times [2021-08-21 18:49:36,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:36,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173902135] [2021-08-21 18:49:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:36,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:37,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:37,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173902135] [2021-08-21 18:49:37,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173902135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:37,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539313494] [2021-08-21 18:49:37,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:49:37,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:37,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:37,045 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:37,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:49:37,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:49:37,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:37,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:37,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539313494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:37,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:37,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 18:49:37,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569534657] [2021-08-21 18:49:37,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:49:37,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:37,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:49:37,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:49:37,559 INFO L87 Difference]: Start difference. First operand 1710 states and 4955 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:37,866 INFO L93 Difference]: Finished difference Result 2535 states and 7114 transitions. [2021-08-21 18:49:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:49:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:37,875 INFO L225 Difference]: With dead ends: 2535 [2021-08-21 18:49:37,876 INFO L226 Difference]: Without dead ends: 2515 [2021-08-21 18:49:37,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-08-21 18:49:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2013. [2021-08-21 18:49:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.9652087475149105) internal successors, (5966), 2012 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5966 transitions. [2021-08-21 18:49:37,917 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5966 transitions. Word has length 35 [2021-08-21 18:49:37,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:37,917 INFO L470 AbstractCegarLoop]: Abstraction has 2013 states and 5966 transitions. [2021-08-21 18:49:37,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:37,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5966 transitions. [2021-08-21 18:49:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:37,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:37,921 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:37,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:38,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:38,137 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash -804415550, now seen corresponding path program 15 times [2021-08-21 18:49:38,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:38,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382793690] [2021-08-21 18:49:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:38,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:38,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:38,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382793690] [2021-08-21 18:49:38,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382793690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:38,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512710891] [2021-08-21 18:49:38,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:38,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:38,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:38,306 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:38,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:49:38,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:49:38,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:38,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:38,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:38,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512710891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:38,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:38,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 18:49:38,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808062771] [2021-08-21 18:49:38,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:38,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:38,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:38,809 INFO L87 Difference]: Start difference. First operand 2013 states and 5966 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:39,157 INFO L93 Difference]: Finished difference Result 2775 states and 7926 transitions. [2021-08-21 18:49:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:49:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:39,164 INFO L225 Difference]: With dead ends: 2775 [2021-08-21 18:49:39,164 INFO L226 Difference]: Without dead ends: 2766 [2021-08-21 18:49:39,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-08-21 18:49:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2223. [2021-08-21 18:49:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 3.0256525652565256) internal successors, (6723), 2222 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 6723 transitions. [2021-08-21 18:49:39,217 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 6723 transitions. Word has length 35 [2021-08-21 18:49:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:39,217 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 6723 transitions. [2021-08-21 18:49:39,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 6723 transitions. [2021-08-21 18:49:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:39,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:39,222 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:39,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:39,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:39,439 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash -561379646, now seen corresponding path program 16 times [2021-08-21 18:49:39,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:39,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497810016] [2021-08-21 18:49:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:39,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:39,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:39,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497810016] [2021-08-21 18:49:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497810016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:39,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075003711] [2021-08-21 18:49:39,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:39,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:39,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:39,593 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:39,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:49:39,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:39,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:39,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:40,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075003711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:40,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:40,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 18:49:40,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391667506] [2021-08-21 18:49:40,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:40,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:40,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:40,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:40,112 INFO L87 Difference]: Start difference. First operand 2223 states and 6723 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:40,447 INFO L93 Difference]: Finished difference Result 2901 states and 8551 transitions. [2021-08-21 18:49:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:49:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:40,454 INFO L225 Difference]: With dead ends: 2901 [2021-08-21 18:49:40,454 INFO L226 Difference]: Without dead ends: 2892 [2021-08-21 18:49:40,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-08-21 18:49:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2457. [2021-08-21 18:49:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2457 states, 2456 states have (on average 3.087540716612378) internal successors, (7583), 2456 states have internal predecessors, (7583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 7583 transitions. [2021-08-21 18:49:40,500 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 7583 transitions. Word has length 35 [2021-08-21 18:49:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:40,500 INFO L470 AbstractCegarLoop]: Abstraction has 2457 states and 7583 transitions. [2021-08-21 18:49:40,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 7583 transitions. [2021-08-21 18:49:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:40,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:40,505 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:40,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:40,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:40,721 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:40,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1454620610, now seen corresponding path program 17 times [2021-08-21 18:49:40,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:40,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135649433] [2021-08-21 18:49:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:40,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:40,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:40,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135649433] [2021-08-21 18:49:40,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135649433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:40,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750326189] [2021-08-21 18:49:40,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:40,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:40,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:40,889 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:40,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:49:41,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:49:41,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:41,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750326189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:41,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:41,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 18:49:41,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100206875] [2021-08-21 18:49:41,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:49:41,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:41,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:49:41,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:49:41,409 INFO L87 Difference]: Start difference. First operand 2457 states and 7583 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:41,826 INFO L93 Difference]: Finished difference Result 2906 states and 8549 transitions. [2021-08-21 18:49:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:49:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:41,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:41,833 INFO L225 Difference]: With dead ends: 2906 [2021-08-21 18:49:41,833 INFO L226 Difference]: Without dead ends: 2897 [2021-08-21 18:49:41,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:49:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-08-21 18:49:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2473. [2021-08-21 18:49:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 3.085760517799353) internal successors, (7628), 2472 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 7628 transitions. [2021-08-21 18:49:41,877 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 7628 transitions. Word has length 35 [2021-08-21 18:49:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:41,877 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 7628 transitions. [2021-08-21 18:49:41,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 7628 transitions. [2021-08-21 18:49:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:41,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:41,884 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:41,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:42,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:42,101 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash -298082426, now seen corresponding path program 18 times [2021-08-21 18:49:42,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:42,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457895561] [2021-08-21 18:49:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:42,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:42,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:42,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457895561] [2021-08-21 18:49:42,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457895561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:42,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847856175] [2021-08-21 18:49:42,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:42,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:42,290 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:42,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:49:42,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:49:42,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:42,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:42,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847856175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:42,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:42,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 18:49:42,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674203150] [2021-08-21 18:49:42,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:42,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:42,846 INFO L87 Difference]: Start difference. First operand 2473 states and 7628 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:43,115 INFO L93 Difference]: Finished difference Result 3114 states and 9220 transitions. [2021-08-21 18:49:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:49:43,117 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:43,124 INFO L225 Difference]: With dead ends: 3114 [2021-08-21 18:49:43,124 INFO L226 Difference]: Without dead ends: 3105 [2021-08-21 18:49:43,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:49:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-08-21 18:49:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 2627. [2021-08-21 18:49:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 3.111576542269612) internal successors, (8171), 2626 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 8171 transitions. [2021-08-21 18:49:43,182 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 8171 transitions. Word has length 35 [2021-08-21 18:49:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:43,182 INFO L470 AbstractCegarLoop]: Abstraction has 2627 states and 8171 transitions. [2021-08-21 18:49:43,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 8171 transitions. [2021-08-21 18:49:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:43,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:43,187 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:43,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:43,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:43,404 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash -761119934, now seen corresponding path program 19 times [2021-08-21 18:49:43,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:43,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084578247] [2021-08-21 18:49:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:43,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:49:43,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:43,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084578247] [2021-08-21 18:49:43,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084578247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:43,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560290216] [2021-08-21 18:49:43,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:43,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:43,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:43,465 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:43,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:49:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:43,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:49:43,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560290216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:43,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:43,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:49:43,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615540102] [2021-08-21 18:49:43,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:43,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:43,964 INFO L87 Difference]: Start difference. First operand 2627 states and 8171 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:44,190 INFO L93 Difference]: Finished difference Result 5013 states and 14820 transitions. [2021-08-21 18:49:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:49:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:44,200 INFO L225 Difference]: With dead ends: 5013 [2021-08-21 18:49:44,200 INFO L226 Difference]: Without dead ends: 5013 [2021-08-21 18:49:44,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-08-21 18:49:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 3637. [2021-08-21 18:49:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 3.152640264026403) internal successors, (11463), 3636 states have internal predecessors, (11463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 11463 transitions. [2021-08-21 18:49:44,321 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 11463 transitions. Word has length 35 [2021-08-21 18:49:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:44,321 INFO L470 AbstractCegarLoop]: Abstraction has 3637 states and 11463 transitions. [2021-08-21 18:49:44,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 11463 transitions. [2021-08-21 18:49:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:44,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:44,329 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:44,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:44,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:44,545 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:44,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:44,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1545628034, now seen corresponding path program 20 times [2021-08-21 18:49:44,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:44,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764044624] [2021-08-21 18:49:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:44,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:44,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:44,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764044624] [2021-08-21 18:49:44,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764044624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:44,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408867962] [2021-08-21 18:49:44,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:49:44,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:44,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:44,700 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:44,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:49:45,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:49:45,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:45,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:45,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408867962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:45,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:45,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-08-21 18:49:45,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717089966] [2021-08-21 18:49:45,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:49:45,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:45,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:49:45,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:49:45,264 INFO L87 Difference]: Start difference. First operand 3637 states and 11463 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:45,628 INFO L93 Difference]: Finished difference Result 4848 states and 14453 transitions. [2021-08-21 18:49:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:49:45,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:45,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:45,637 INFO L225 Difference]: With dead ends: 4848 [2021-08-21 18:49:45,637 INFO L226 Difference]: Without dead ends: 4839 [2021-08-21 18:49:45,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:49:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2021-08-21 18:49:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3942. [2021-08-21 18:49:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 3.154783049987313) internal successors, (12433), 3941 states have internal predecessors, (12433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 12433 transitions. [2021-08-21 18:49:45,710 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 12433 transitions. Word has length 35 [2021-08-21 18:49:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:45,710 INFO L470 AbstractCegarLoop]: Abstraction has 3942 states and 12433 transitions. [2021-08-21 18:49:45,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 12433 transitions. [2021-08-21 18:49:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:45,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:45,717 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:45,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:45,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:49:45,929 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1744588994, now seen corresponding path program 21 times [2021-08-21 18:49:45,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:45,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374325801] [2021-08-21 18:49:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:45,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:46,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:46,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374325801] [2021-08-21 18:49:46,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374325801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:46,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125460258] [2021-08-21 18:49:46,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:46,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:46,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:46,068 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:46,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:49:46,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:49:46,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:46,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:46,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125460258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:46,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:46,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-08-21 18:49:46,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171636328] [2021-08-21 18:49:46,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:49:46,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:49:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:49:46,626 INFO L87 Difference]: Start difference. First operand 3942 states and 12433 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:46,821 INFO L93 Difference]: Finished difference Result 4665 states and 14152 transitions. [2021-08-21 18:49:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:49:46,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:46,830 INFO L225 Difference]: With dead ends: 4665 [2021-08-21 18:49:46,830 INFO L226 Difference]: Without dead ends: 4656 [2021-08-21 18:49:46,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4656 states. [2021-08-21 18:49:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4656 to 4039. [2021-08-21 18:49:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4039 states, 4038 states have (on average 3.1604754829123327) internal successors, (12762), 4038 states have internal predecessors, (12762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 12762 transitions. [2021-08-21 18:49:46,902 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 12762 transitions. Word has length 35 [2021-08-21 18:49:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:46,902 INFO L470 AbstractCegarLoop]: Abstraction has 4039 states and 12762 transitions. [2021-08-21 18:49:46,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 12762 transitions. [2021-08-21 18:49:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:46,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:46,909 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:46,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:47,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-21 18:49:47,126 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:47,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash 207832574, now seen corresponding path program 22 times [2021-08-21 18:49:47,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:47,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814932835] [2021-08-21 18:49:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:47,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:47,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:47,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814932835] [2021-08-21 18:49:47,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814932835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:47,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305133319] [2021-08-21 18:49:47,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:47,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:47,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:47,188 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:47,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:49:47,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:47,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:47,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305133319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:47,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:47,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:49:47,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532322086] [2021-08-21 18:49:47,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:49:47,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:49:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:49:47,743 INFO L87 Difference]: Start difference. First operand 4039 states and 12762 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:47,963 INFO L93 Difference]: Finished difference Result 5069 states and 15373 transitions. [2021-08-21 18:49:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:49:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:47,972 INFO L225 Difference]: With dead ends: 5069 [2021-08-21 18:49:47,972 INFO L226 Difference]: Without dead ends: 5010 [2021-08-21 18:49:47,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:49:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2021-08-21 18:49:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 3960. [2021-08-21 18:49:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3959 states have (on average 3.15332154584491) internal successors, (12484), 3959 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 12484 transitions. [2021-08-21 18:49:48,040 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 12484 transitions. Word has length 35 [2021-08-21 18:49:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:48,040 INFO L470 AbstractCegarLoop]: Abstraction has 3960 states and 12484 transitions. [2021-08-21 18:49:48,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 12484 transitions. [2021-08-21 18:49:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:48,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:48,059 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:48,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:48,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:49:48,275 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1730877954, now seen corresponding path program 23 times [2021-08-21 18:49:48,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:48,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453794210] [2021-08-21 18:49:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:48,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:48,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:48,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453794210] [2021-08-21 18:49:48,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453794210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:48,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304983227] [2021-08-21 18:49:48,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:48,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:48,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:48,314 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:48,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:49:48,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:49:48,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:48,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:49:48,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304983227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:48,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:48,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-08-21 18:49:48,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786613981] [2021-08-21 18:49:48,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:49:48,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:49:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:49:48,844 INFO L87 Difference]: Start difference. First operand 3960 states and 12484 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:49,036 INFO L93 Difference]: Finished difference Result 4224 states and 13102 transitions. [2021-08-21 18:49:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:49:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:49,043 INFO L225 Difference]: With dead ends: 4224 [2021-08-21 18:49:49,043 INFO L226 Difference]: Without dead ends: 4185 [2021-08-21 18:49:49,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:49:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-08-21 18:49:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3606. [2021-08-21 18:49:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 3.1908460471567266) internal successors, (11503), 3605 states have internal predecessors, (11503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 11503 transitions. [2021-08-21 18:49:49,102 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 11503 transitions. Word has length 35 [2021-08-21 18:49:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:49,102 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 11503 transitions. [2021-08-21 18:49:49,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 11503 transitions. [2021-08-21 18:49:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:49,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:49,123 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:49,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:49,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:49,332 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -718371330, now seen corresponding path program 24 times [2021-08-21 18:49:49,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:49,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778951711] [2021-08-21 18:49:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:49,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:49:49,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:49,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778951711] [2021-08-21 18:49:49,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778951711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:49,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650320441] [2021-08-21 18:49:49,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:49,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:49,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:49,389 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:49,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:49:49,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:49:49,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:49:49,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650320441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:49,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:49,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-08-21 18:49:49,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162931914] [2021-08-21 18:49:49,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:49,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:49,938 INFO L87 Difference]: Start difference. First operand 3606 states and 11503 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:50,171 INFO L93 Difference]: Finished difference Result 4632 states and 14315 transitions. [2021-08-21 18:49:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:49:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:50,179 INFO L225 Difference]: With dead ends: 4632 [2021-08-21 18:49:50,179 INFO L226 Difference]: Without dead ends: 4588 [2021-08-21 18:49:50,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:49:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2021-08-21 18:49:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 3862. [2021-08-21 18:49:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3862 states, 3861 states have (on average 3.186221186221186) internal successors, (12302), 3861 states have internal predecessors, (12302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3862 states to 3862 states and 12302 transitions. [2021-08-21 18:49:50,257 INFO L78 Accepts]: Start accepts. Automaton has 3862 states and 12302 transitions. Word has length 35 [2021-08-21 18:49:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:50,257 INFO L470 AbstractCegarLoop]: Abstraction has 3862 states and 12302 transitions. [2021-08-21 18:49:50,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3862 states and 12302 transitions. [2021-08-21 18:49:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:50,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:50,263 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:50,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:50,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:49:50,473 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:50,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:50,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1486018174, now seen corresponding path program 25 times [2021-08-21 18:49:50,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:50,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435050030] [2021-08-21 18:49:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:50,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:50,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:50,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435050030] [2021-08-21 18:49:50,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435050030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:50,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473544344] [2021-08-21 18:49:50,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:50,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:50,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:50,637 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:50,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:49:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:51,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:51,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:51,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473544344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:51,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:51,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 18:49:51,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702868835] [2021-08-21 18:49:51,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:49:51,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:51,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:49:51,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:49:51,291 INFO L87 Difference]: Start difference. First operand 3862 states and 12302 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:51,681 INFO L93 Difference]: Finished difference Result 4859 states and 14842 transitions. [2021-08-21 18:49:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:49:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:51,691 INFO L225 Difference]: With dead ends: 4859 [2021-08-21 18:49:51,691 INFO L226 Difference]: Without dead ends: 4839 [2021-08-21 18:49:51,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:49:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2021-08-21 18:49:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 4171. [2021-08-21 18:49:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4171 states, 4170 states have (on average 3.1894484412470026) internal successors, (13300), 4170 states have internal predecessors, (13300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4171 states to 4171 states and 13300 transitions. [2021-08-21 18:49:51,772 INFO L78 Accepts]: Start accepts. Automaton has 4171 states and 13300 transitions. Word has length 35 [2021-08-21 18:49:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:51,772 INFO L470 AbstractCegarLoop]: Abstraction has 4171 states and 13300 transitions. [2021-08-21 18:49:51,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4171 states and 13300 transitions. [2021-08-21 18:49:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:51,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:51,779 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:51,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:51,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:49:51,990 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1687149058, now seen corresponding path program 26 times [2021-08-21 18:49:51,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:51,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172377019] [2021-08-21 18:49:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:51,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:49:52,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:52,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172377019] [2021-08-21 18:49:52,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172377019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:52,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999312421] [2021-08-21 18:49:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:49:52,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:52,037 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:52,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:49:52,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:49:52,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:52,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:49:52,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999312421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:52,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:52,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-08-21 18:49:52,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855338816] [2021-08-21 18:49:52,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:52,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:52,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:52,661 INFO L87 Difference]: Start difference. First operand 4171 states and 13300 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:53,010 INFO L93 Difference]: Finished difference Result 6317 states and 19114 transitions. [2021-08-21 18:49:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:49:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:53,021 INFO L225 Difference]: With dead ends: 6317 [2021-08-21 18:49:53,022 INFO L226 Difference]: Without dead ends: 6260 [2021-08-21 18:49:53,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:49:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2021-08-21 18:49:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 5075. [2021-08-21 18:49:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.163579030350808) internal successors, (16052), 5074 states have internal predecessors, (16052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 16052 transitions. [2021-08-21 18:49:53,105 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 16052 transitions. Word has length 35 [2021-08-21 18:49:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:53,105 INFO L470 AbstractCegarLoop]: Abstraction has 5075 states and 16052 transitions. [2021-08-21 18:49:53,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 16052 transitions. [2021-08-21 18:49:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:53,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:53,113 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:53,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:53,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:53,314 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:53,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1087527486, now seen corresponding path program 27 times [2021-08-21 18:49:53,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:53,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267204909] [2021-08-21 18:49:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:53,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:53,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:53,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267204909] [2021-08-21 18:49:53,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267204909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:53,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967722947] [2021-08-21 18:49:53,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:49:53,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:53,457 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:53,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:49:53,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:49:53,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:53,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:53,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:54,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967722947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:54,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:54,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 18:49:54,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449032276] [2021-08-21 18:49:54,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:49:54,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:49:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:49:54,140 INFO L87 Difference]: Start difference. First operand 5075 states and 16052 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:54,423 INFO L93 Difference]: Finished difference Result 5708 states and 17463 transitions. [2021-08-21 18:49:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:49:54,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:54,435 INFO L225 Difference]: With dead ends: 5708 [2021-08-21 18:49:54,435 INFO L226 Difference]: Without dead ends: 5699 [2021-08-21 18:49:54,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:49:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2021-08-21 18:49:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 5088. [2021-08-21 18:49:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 3.161981521525457) internal successors, (16085), 5087 states have internal predecessors, (16085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 16085 transitions. [2021-08-21 18:49:54,514 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 16085 transitions. Word has length 35 [2021-08-21 18:49:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:54,514 INFO L470 AbstractCegarLoop]: Abstraction has 5088 states and 16085 transitions. [2021-08-21 18:49:54,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 16085 transitions. [2021-08-21 18:49:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:54,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:54,522 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:54,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 18:49:54,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:54,724 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:54,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1444113154, now seen corresponding path program 28 times [2021-08-21 18:49:54,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:54,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729334352] [2021-08-21 18:49:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:54,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:54,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:54,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729334352] [2021-08-21 18:49:54,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729334352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:54,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809700763] [2021-08-21 18:49:54,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:54,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:54,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:54,781 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:54,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:49:55,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:55,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:55,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:55,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:49:55,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809700763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:55,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:55,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 15 [2021-08-21 18:49:55,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534885317] [2021-08-21 18:49:55,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:55,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:55,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:55,433 INFO L87 Difference]: Start difference. First operand 5088 states and 16085 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:55,813 INFO L93 Difference]: Finished difference Result 7190 states and 21773 transitions. [2021-08-21 18:49:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:49:55,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:55,826 INFO L225 Difference]: With dead ends: 7190 [2021-08-21 18:49:55,827 INFO L226 Difference]: Without dead ends: 7061 [2021-08-21 18:49:55,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:49:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7061 states. [2021-08-21 18:49:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7061 to 6325. [2021-08-21 18:49:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6325 states, 6324 states have (on average 3.109108159392789) internal successors, (19662), 6324 states have internal predecessors, (19662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6325 states to 6325 states and 19662 transitions. [2021-08-21 18:49:55,930 INFO L78 Accepts]: Start accepts. Automaton has 6325 states and 19662 transitions. Word has length 35 [2021-08-21 18:49:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:55,931 INFO L470 AbstractCegarLoop]: Abstraction has 6325 states and 19662 transitions. [2021-08-21 18:49:55,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6325 states and 19662 transitions. [2021-08-21 18:49:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:55,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:55,942 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:55,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:56,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:56,142 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:56,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1361780350, now seen corresponding path program 29 times [2021-08-21 18:49:56,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:56,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86658524] [2021-08-21 18:49:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:56,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:56,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:56,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86658524] [2021-08-21 18:49:56,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86658524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:56,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775753238] [2021-08-21 18:49:56,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:56,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:56,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:56,314 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:56,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:49:56,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:49:56,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:56,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:57,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775753238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:57,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:57,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 18:49:57,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114435164] [2021-08-21 18:49:57,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:49:57,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:49:57,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:49:57,065 INFO L87 Difference]: Start difference. First operand 6325 states and 19662 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:57,371 INFO L93 Difference]: Finished difference Result 6778 states and 20631 transitions. [2021-08-21 18:49:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:49:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:57,385 INFO L225 Difference]: With dead ends: 6778 [2021-08-21 18:49:57,385 INFO L226 Difference]: Without dead ends: 6769 [2021-08-21 18:49:57,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:49:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6769 states. [2021-08-21 18:49:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6769 to 6335. [2021-08-21 18:49:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6335 states, 6334 states have (on average 3.1089359014840543) internal successors, (19692), 6334 states have internal predecessors, (19692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 19692 transitions. [2021-08-21 18:49:57,524 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 19692 transitions. Word has length 35 [2021-08-21 18:49:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:57,524 INFO L470 AbstractCegarLoop]: Abstraction has 6335 states and 19692 transitions. [2021-08-21 18:49:57,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 19692 transitions. [2021-08-21 18:49:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:57,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:57,534 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:57,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 18:49:57,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:57,735 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1343951738, now seen corresponding path program 30 times [2021-08-21 18:49:57,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:57,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985870287] [2021-08-21 18:49:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:57,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:49:57,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:57,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985870287] [2021-08-21 18:49:57,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985870287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:57,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312555860] [2021-08-21 18:49:57,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:57,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:57,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:57,794 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:57,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:49:58,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 18:49:58,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:58,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:49:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:49:58,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312555860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:58,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:58,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-08-21 18:49:58,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948880501] [2021-08-21 18:49:58,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:49:58,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:58,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:49:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:49:58,480 INFO L87 Difference]: Start difference. First operand 6335 states and 19692 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:58,785 INFO L93 Difference]: Finished difference Result 10739 states and 31449 transitions. [2021-08-21 18:49:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:49:58,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:49:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:58,805 INFO L225 Difference]: With dead ends: 10739 [2021-08-21 18:49:58,805 INFO L226 Difference]: Without dead ends: 10739 [2021-08-21 18:49:58,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:49:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10739 states. [2021-08-21 18:49:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10739 to 6622. [2021-08-21 18:49:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6622 states, 6621 states have (on average 3.0897145446307204) internal successors, (20457), 6621 states have internal predecessors, (20457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6622 states to 6622 states and 20457 transitions. [2021-08-21 18:49:59,004 INFO L78 Accepts]: Start accepts. Automaton has 6622 states and 20457 transitions. Word has length 35 [2021-08-21 18:49:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:59,005 INFO L470 AbstractCegarLoop]: Abstraction has 6622 states and 20457 transitions. [2021-08-21 18:49:59,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6622 states and 20457 transitions. [2021-08-21 18:49:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:49:59,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:59,015 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:59,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:59,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-21 18:49:59,215 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:49:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1473719558, now seen corresponding path program 31 times [2021-08-21 18:49:59,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:59,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885477535] [2021-08-21 18:49:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:59,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:49:59,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:59,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885477535] [2021-08-21 18:49:59,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885477535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:59,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759731260] [2021-08-21 18:49:59,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:59,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:59,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:59,365 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:59,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:49:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:49:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:00,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759731260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:00,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:00,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 18:50:00,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649605758] [2021-08-21 18:50:00,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:50:00,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:50:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:50:00,098 INFO L87 Difference]: Start difference. First operand 6622 states and 20457 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:00,501 INFO L93 Difference]: Finished difference Result 7886 states and 23504 transitions. [2021-08-21 18:50:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:50:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:50:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:00,517 INFO L225 Difference]: With dead ends: 7886 [2021-08-21 18:50:00,518 INFO L226 Difference]: Without dead ends: 7877 [2021-08-21 18:50:00,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:50:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7877 states. [2021-08-21 18:50:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7877 to 6759. [2021-08-21 18:50:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6759 states, 6758 states have (on average 3.092482983131104) internal successors, (20899), 6758 states have internal predecessors, (20899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6759 states to 6759 states and 20899 transitions. [2021-08-21 18:50:00,690 INFO L78 Accepts]: Start accepts. Automaton has 6759 states and 20899 transitions. Word has length 35 [2021-08-21 18:50:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:00,690 INFO L470 AbstractCegarLoop]: Abstraction has 6759 states and 20899 transitions. [2021-08-21 18:50:00,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 6759 states and 20899 transitions. [2021-08-21 18:50:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:00,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:00,702 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:00,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:00,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:00,920 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash 725900036, now seen corresponding path program 32 times [2021-08-21 18:50:00,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:00,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804472998] [2021-08-21 18:50:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:00,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:50:00,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:00,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804472998] [2021-08-21 18:50:00,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804472998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:00,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805742396] [2021-08-21 18:50:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:00,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:00,992 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:00,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:50:01,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:01,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:50:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:50:01,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805742396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:01,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:01,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 18:50:01,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691172615] [2021-08-21 18:50:01,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:50:01,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:01,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:50:01,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:50:01,729 INFO L87 Difference]: Start difference. First operand 6759 states and 20899 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:02,076 INFO L93 Difference]: Finished difference Result 10801 states and 31676 transitions. [2021-08-21 18:50:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:50:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:02,097 INFO L225 Difference]: With dead ends: 10801 [2021-08-21 18:50:02,097 INFO L226 Difference]: Without dead ends: 10801 [2021-08-21 18:50:02,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:50:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10801 states. [2021-08-21 18:50:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10801 to 8195. [2021-08-21 18:50:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8195 states, 8194 states have (on average 3.132780082987552) internal successors, (25670), 8194 states have internal predecessors, (25670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8195 states to 8195 states and 25670 transitions. [2021-08-21 18:50:02,269 INFO L78 Accepts]: Start accepts. Automaton has 8195 states and 25670 transitions. Word has length 37 [2021-08-21 18:50:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:02,269 INFO L470 AbstractCegarLoop]: Abstraction has 8195 states and 25670 transitions. [2021-08-21 18:50:02,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 8195 states and 25670 transitions. [2021-08-21 18:50:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:02,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:02,282 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:02,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:50:02,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:02,483 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:02,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:02,484 INFO L82 PathProgramCache]: Analyzing trace with hash -944879552, now seen corresponding path program 33 times [2021-08-21 18:50:02,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:02,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974098818] [2021-08-21 18:50:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:02,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:02,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:02,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974098818] [2021-08-21 18:50:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974098818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:02,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552616337] [2021-08-21 18:50:02,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:02,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:02,558 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:02,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:50:03,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:50:03,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:50:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:03,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552616337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:03,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:03,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-21 18:50:03,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345320668] [2021-08-21 18:50:03,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:50:03,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:03,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:50:03,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:50:03,410 INFO L87 Difference]: Start difference. First operand 8195 states and 25670 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:03,990 INFO L93 Difference]: Finished difference Result 11063 states and 33289 transitions. [2021-08-21 18:50:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:50:03,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:03,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:04,015 INFO L225 Difference]: With dead ends: 11063 [2021-08-21 18:50:04,015 INFO L226 Difference]: Without dead ends: 10966 [2021-08-21 18:50:04,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:50:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10966 states. [2021-08-21 18:50:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10966 to 8735. [2021-08-21 18:50:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8735 states, 8734 states have (on average 3.1019006182734143) internal successors, (27092), 8734 states have internal predecessors, (27092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8735 states to 8735 states and 27092 transitions. [2021-08-21 18:50:04,215 INFO L78 Accepts]: Start accepts. Automaton has 8735 states and 27092 transitions. Word has length 37 [2021-08-21 18:50:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:04,215 INFO L470 AbstractCegarLoop]: Abstraction has 8735 states and 27092 transitions. [2021-08-21 18:50:04,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8735 states and 27092 transitions. [2021-08-21 18:50:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:04,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:04,229 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:04,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:50:04,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:50:04,441 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:04,441 INFO L82 PathProgramCache]: Analyzing trace with hash 917386620, now seen corresponding path program 34 times [2021-08-21 18:50:04,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:04,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544101066] [2021-08-21 18:50:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:04,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:04,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:04,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544101066] [2021-08-21 18:50:04,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544101066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:04,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112168264] [2021-08-21 18:50:04,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:04,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:04,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:04,541 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:04,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:50:05,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:05,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:50:05,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:05,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112168264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:05,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:05,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 18:50:05,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199608010] [2021-08-21 18:50:05,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:50:05,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:05,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:50:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:50:05,556 INFO L87 Difference]: Start difference. First operand 8735 states and 27092 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:06,080 INFO L93 Difference]: Finished difference Result 10408 states and 31901 transitions. [2021-08-21 18:50:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:50:06,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:06,107 INFO L225 Difference]: With dead ends: 10408 [2021-08-21 18:50:06,107 INFO L226 Difference]: Without dead ends: 10366 [2021-08-21 18:50:06,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:50:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10366 states. [2021-08-21 18:50:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10366 to 9351. [2021-08-21 18:50:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9351 states, 9350 states have (on average 3.089625668449198) internal successors, (28888), 9350 states have internal predecessors, (28888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9351 states to 9351 states and 28888 transitions. [2021-08-21 18:50:06,318 INFO L78 Accepts]: Start accepts. Automaton has 9351 states and 28888 transitions. Word has length 37 [2021-08-21 18:50:06,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:06,319 INFO L470 AbstractCegarLoop]: Abstraction has 9351 states and 28888 transitions. [2021-08-21 18:50:06,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 9351 states and 28888 transitions. [2021-08-21 18:50:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:06,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:06,335 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:06,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:06,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 18:50:06,557 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:06,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1451931524, now seen corresponding path program 35 times [2021-08-21 18:50:06,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:06,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14896435] [2021-08-21 18:50:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:06,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:06,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:06,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14896435] [2021-08-21 18:50:06,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14896435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:06,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106784465] [2021-08-21 18:50:06,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:06,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:06,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:06,613 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:06,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:50:07,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:50:07,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:50:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:07,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106784465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:07,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:07,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-08-21 18:50:07,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760280433] [2021-08-21 18:50:07,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:50:07,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:07,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:50:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:50:07,508 INFO L87 Difference]: Start difference. First operand 9351 states and 28888 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:07,882 INFO L93 Difference]: Finished difference Result 11836 states and 35931 transitions. [2021-08-21 18:50:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:50:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:07,909 INFO L225 Difference]: With dead ends: 11836 [2021-08-21 18:50:07,909 INFO L226 Difference]: Without dead ends: 11804 [2021-08-21 18:50:07,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:50:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11804 states. [2021-08-21 18:50:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11804 to 9869. [2021-08-21 18:50:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9869 states, 9868 states have (on average 3.076205918119173) internal successors, (30356), 9868 states have internal predecessors, (30356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9869 states to 9869 states and 30356 transitions. [2021-08-21 18:50:08,120 INFO L78 Accepts]: Start accepts. Automaton has 9869 states and 30356 transitions. Word has length 37 [2021-08-21 18:50:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:08,120 INFO L470 AbstractCegarLoop]: Abstraction has 9869 states and 30356 transitions. [2021-08-21 18:50:08,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 9869 states and 30356 transitions. [2021-08-21 18:50:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:08,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:08,136 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:08,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:08,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:50:08,337 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1402242624, now seen corresponding path program 36 times [2021-08-21 18:50:08,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:08,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793739787] [2021-08-21 18:50:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:08,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:08,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:08,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793739787] [2021-08-21 18:50:08,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793739787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:08,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073656302] [2021-08-21 18:50:08,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:08,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:08,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:08,429 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:08,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:50:09,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:50:09,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:09,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:09,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073656302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:09,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:09,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2021-08-21 18:50:09,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305490211] [2021-08-21 18:50:09,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:50:09,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:09,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:50:09,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:50:09,290 INFO L87 Difference]: Start difference. First operand 9869 states and 30356 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:09,620 INFO L93 Difference]: Finished difference Result 11791 states and 35862 transitions. [2021-08-21 18:50:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:50:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:09,649 INFO L225 Difference]: With dead ends: 11791 [2021-08-21 18:50:09,649 INFO L226 Difference]: Without dead ends: 11780 [2021-08-21 18:50:09,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:50:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11780 states. [2021-08-21 18:50:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11780 to 9849. [2021-08-21 18:50:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9848 states have (on average 3.07676685621446) internal successors, (30300), 9848 states have internal predecessors, (30300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 30300 transitions. [2021-08-21 18:50:09,841 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 30300 transitions. Word has length 37 [2021-08-21 18:50:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:09,841 INFO L470 AbstractCegarLoop]: Abstraction has 9849 states and 30300 transitions. [2021-08-21 18:50:09,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 30300 transitions. [2021-08-21 18:50:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:09,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:09,856 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:09,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 18:50:10,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:50:10,056 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2008006464, now seen corresponding path program 37 times [2021-08-21 18:50:10,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:10,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437165592] [2021-08-21 18:50:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:10,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:10,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:10,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437165592] [2021-08-21 18:50:10,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437165592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:10,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523733264] [2021-08-21 18:50:10,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:50:10,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:10,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:10,245 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:10,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:50:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:10,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:50:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:11,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523733264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:11,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:11,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 18:50:11,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863755474] [2021-08-21 18:50:11,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:50:11,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:11,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:50:11,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:50:11,181 INFO L87 Difference]: Start difference. First operand 9849 states and 30300 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:11,574 INFO L93 Difference]: Finished difference Result 10599 states and 32071 transitions. [2021-08-21 18:50:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:50:11,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:11,597 INFO L225 Difference]: With dead ends: 10599 [2021-08-21 18:50:11,597 INFO L226 Difference]: Without dead ends: 10590 [2021-08-21 18:50:11,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:50:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10590 states. [2021-08-21 18:50:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10590 to 9962. [2021-08-21 18:50:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 3.0799116554562795) internal successors, (30679), 9961 states have internal predecessors, (30679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 30679 transitions. [2021-08-21 18:50:11,766 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 30679 transitions. Word has length 37 [2021-08-21 18:50:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:11,767 INFO L470 AbstractCegarLoop]: Abstraction has 9962 states and 30679 transitions. [2021-08-21 18:50:11,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 30679 transitions. [2021-08-21 18:50:11,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:11,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:11,783 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:11,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 18:50:11,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:11,984 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:11,984 INFO L82 PathProgramCache]: Analyzing trace with hash 128300156, now seen corresponding path program 38 times [2021-08-21 18:50:11,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:11,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241991133] [2021-08-21 18:50:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:11,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:12,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:12,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241991133] [2021-08-21 18:50:12,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241991133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:12,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798226579] [2021-08-21 18:50:12,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:12,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:12,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:12,121 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:12,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:50:12,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:50:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:12,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798226579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:12,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:12,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 18:50:12,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581202599] [2021-08-21 18:50:12,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:50:12,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:12,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:50:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:50:12,998 INFO L87 Difference]: Start difference. First operand 9962 states and 30679 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:13,345 INFO L93 Difference]: Finished difference Result 11193 states and 34056 transitions. [2021-08-21 18:50:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:50:13,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:13,369 INFO L225 Difference]: With dead ends: 11193 [2021-08-21 18:50:13,369 INFO L226 Difference]: Without dead ends: 11132 [2021-08-21 18:50:13,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:50:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2021-08-21 18:50:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 9988. [2021-08-21 18:50:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 3.078702313006909) internal successors, (30747), 9987 states have internal predecessors, (30747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 30747 transitions. [2021-08-21 18:50:13,570 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 30747 transitions. Word has length 37 [2021-08-21 18:50:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:13,570 INFO L470 AbstractCegarLoop]: Abstraction has 9988 states and 30747 transitions. [2021-08-21 18:50:13,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 30747 transitions. [2021-08-21 18:50:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:13,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:13,587 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:13,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:13,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 18:50:13,787 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -156833472, now seen corresponding path program 39 times [2021-08-21 18:50:13,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:13,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942391826] [2021-08-21 18:50:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:13,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:13,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:13,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942391826] [2021-08-21 18:50:13,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942391826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:13,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40282395] [2021-08-21 18:50:13,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:13,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:13,862 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:13,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:50:14,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:50:14,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:14,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:14,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40282395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:14,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:14,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:50:14,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659635726] [2021-08-21 18:50:14,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:50:14,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:14,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:50:14,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:50:14,801 INFO L87 Difference]: Start difference. First operand 9988 states and 30747 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:15,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:15,199 INFO L93 Difference]: Finished difference Result 18146 states and 53811 transitions. [2021-08-21 18:50:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:50:15,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:15,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:15,243 INFO L225 Difference]: With dead ends: 18146 [2021-08-21 18:50:15,243 INFO L226 Difference]: Without dead ends: 18146 [2021-08-21 18:50:15,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:50:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18146 states. [2021-08-21 18:50:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18146 to 9839. [2021-08-21 18:50:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9839 states, 9838 states have (on average 2.9981703598292335) internal successors, (29496), 9838 states have internal predecessors, (29496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9839 states to 9839 states and 29496 transitions. [2021-08-21 18:50:15,511 INFO L78 Accepts]: Start accepts. Automaton has 9839 states and 29496 transitions. Word has length 37 [2021-08-21 18:50:15,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:15,511 INFO L470 AbstractCegarLoop]: Abstraction has 9839 states and 29496 transitions. [2021-08-21 18:50:15,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9839 states and 29496 transitions. [2021-08-21 18:50:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:15,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:15,527 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:15,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:15,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 18:50:15,728 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash -486779004, now seen corresponding path program 40 times [2021-08-21 18:50:15,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:15,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899209866] [2021-08-21 18:50:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:15,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:15,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:15,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899209866] [2021-08-21 18:50:15,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899209866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:15,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917291094] [2021-08-21 18:50:15,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:15,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:15,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:15,787 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:15,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:50:16,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:16,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:50:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:16,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917291094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:16,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:16,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2021-08-21 18:50:16,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684919418] [2021-08-21 18:50:16,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:50:16,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:50:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:50:16,735 INFO L87 Difference]: Start difference. First operand 9839 states and 29496 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:17,266 INFO L93 Difference]: Finished difference Result 12612 states and 36556 transitions. [2021-08-21 18:50:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:50:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:17,292 INFO L225 Difference]: With dead ends: 12612 [2021-08-21 18:50:17,292 INFO L226 Difference]: Without dead ends: 12445 [2021-08-21 18:50:17,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:50:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12445 states. [2021-08-21 18:50:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12445 to 9842. [2021-08-21 18:50:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9842 states, 9841 states have (on average 2.996240219489889) internal successors, (29486), 9841 states have internal predecessors, (29486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9842 states to 9842 states and 29486 transitions. [2021-08-21 18:50:17,473 INFO L78 Accepts]: Start accepts. Automaton has 9842 states and 29486 transitions. Word has length 37 [2021-08-21 18:50:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:17,473 INFO L470 AbstractCegarLoop]: Abstraction has 9842 states and 29486 transitions. [2021-08-21 18:50:17,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 9842 states and 29486 transitions. [2021-08-21 18:50:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:17,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:17,488 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:17,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:17,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 18:50:17,706 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:17,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:17,706 INFO L82 PathProgramCache]: Analyzing trace with hash -536467904, now seen corresponding path program 41 times [2021-08-21 18:50:17,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:17,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242896504] [2021-08-21 18:50:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:17,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:17,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:17,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242896504] [2021-08-21 18:50:17,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242896504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:17,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419119658] [2021-08-21 18:50:17,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:17,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:17,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:17,777 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:17,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:50:18,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:50:18,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:18,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419119658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:18,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:18,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 19 [2021-08-21 18:50:18,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546906227] [2021-08-21 18:50:18,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:50:18,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:18,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:50:18,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:50:18,722 INFO L87 Difference]: Start difference. First operand 9842 states and 29486 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:19,234 INFO L93 Difference]: Finished difference Result 12421 states and 36215 transitions. [2021-08-21 18:50:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:50:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:19,263 INFO L225 Difference]: With dead ends: 12421 [2021-08-21 18:50:19,263 INFO L226 Difference]: Without dead ends: 12410 [2021-08-21 18:50:19,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:50:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12410 states. [2021-08-21 18:50:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12410 to 9160. [2021-08-21 18:50:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9160 states, 9159 states have (on average 3.0063325690577574) internal successors, (27535), 9159 states have internal predecessors, (27535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9160 states to 9160 states and 27535 transitions. [2021-08-21 18:50:19,474 INFO L78 Accepts]: Start accepts. Automaton has 9160 states and 27535 transitions. Word has length 37 [2021-08-21 18:50:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:19,474 INFO L470 AbstractCegarLoop]: Abstraction has 9160 states and 27535 transitions. [2021-08-21 18:50:19,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 9160 states and 27535 transitions. [2021-08-21 18:50:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:19,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:19,488 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:19,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 18:50:19,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:19,688 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1208764224, now seen corresponding path program 42 times [2021-08-21 18:50:19,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:19,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722439101] [2021-08-21 18:50:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:19,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:19,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:19,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722439101] [2021-08-21 18:50:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722439101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:19,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264193417] [2021-08-21 18:50:19,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:19,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:19,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:19,943 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:19,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:50:20,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:50:20,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:20,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:50:20,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:21,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264193417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:21,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:21,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 18:50:21,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959913059] [2021-08-21 18:50:21,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:50:21,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:21,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:50:21,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:50:21,016 INFO L87 Difference]: Start difference. First operand 9160 states and 27535 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:21,384 INFO L93 Difference]: Finished difference Result 10787 states and 31619 transitions. [2021-08-21 18:50:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:50:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:21,406 INFO L225 Difference]: With dead ends: 10787 [2021-08-21 18:50:21,406 INFO L226 Difference]: Without dead ends: 10767 [2021-08-21 18:50:21,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:50:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-08-21 18:50:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 9565. [2021-08-21 18:50:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9565 states, 9564 states have (on average 3.0186114596403177) internal successors, (28870), 9564 states have internal predecessors, (28870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9565 states to 9565 states and 28870 transitions. [2021-08-21 18:50:21,637 INFO L78 Accepts]: Start accepts. Automaton has 9565 states and 28870 transitions. Word has length 37 [2021-08-21 18:50:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:21,637 INFO L470 AbstractCegarLoop]: Abstraction has 9565 states and 28870 transitions. [2021-08-21 18:50:21,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 9565 states and 28870 transitions. [2021-08-21 18:50:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:21,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:21,653 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:21,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 18:50:21,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:21,855 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:21,855 INFO L82 PathProgramCache]: Analyzing trace with hash -86964160, now seen corresponding path program 43 times [2021-08-21 18:50:21,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:21,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022740237] [2021-08-21 18:50:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:21,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:21,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:21,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022740237] [2021-08-21 18:50:21,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022740237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:21,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998376089] [2021-08-21 18:50:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:50:21,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:21,933 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:21,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:50:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:50:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:22,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998376089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:22,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:22,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-08-21 18:50:22,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278765196] [2021-08-21 18:50:22,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:50:22,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:50:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:50:22,985 INFO L87 Difference]: Start difference. First operand 9565 states and 28870 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:23,734 INFO L93 Difference]: Finished difference Result 16131 states and 46635 transitions. [2021-08-21 18:50:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:50:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:23,863 INFO L225 Difference]: With dead ends: 16131 [2021-08-21 18:50:23,864 INFO L226 Difference]: Without dead ends: 16064 [2021-08-21 18:50:23,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:50:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16064 states. [2021-08-21 18:50:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16064 to 12375. [2021-08-21 18:50:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12375 states, 12374 states have (on average 3.0098593825763698) internal successors, (37244), 12374 states have internal predecessors, (37244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12375 states to 12375 states and 37244 transitions. [2021-08-21 18:50:24,097 INFO L78 Accepts]: Start accepts. Automaton has 12375 states and 37244 transitions. Word has length 37 [2021-08-21 18:50:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:24,097 INFO L470 AbstractCegarLoop]: Abstraction has 12375 states and 37244 transitions. [2021-08-21 18:50:24,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 12375 states and 37244 transitions. [2021-08-21 18:50:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:24,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:24,120 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:24,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:24,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 18:50:24,320 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash 512657412, now seen corresponding path program 44 times [2021-08-21 18:50:24,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:24,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379561676] [2021-08-21 18:50:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:24,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:24,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:24,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379561676] [2021-08-21 18:50:24,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379561676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:24,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551198637] [2021-08-21 18:50:24,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:24,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:24,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:24,501 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:24,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:50:25,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:25,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:25,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:50:25,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:25,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551198637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:25,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:25,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 18:50:25,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804041505] [2021-08-21 18:50:25,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:50:25,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:50:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:50:25,529 INFO L87 Difference]: Start difference. First operand 12375 states and 37244 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:26,000 INFO L93 Difference]: Finished difference Result 13582 states and 39908 transitions. [2021-08-21 18:50:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:50:26,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:26,028 INFO L225 Difference]: With dead ends: 13582 [2021-08-21 18:50:26,029 INFO L226 Difference]: Without dead ends: 13573 [2021-08-21 18:50:26,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:50:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2021-08-21 18:50:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 12388. [2021-08-21 18:50:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12388 states, 12387 states have (on average 3.009364656494712) internal successors, (37277), 12387 states have internal predecessors, (37277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12388 states to 12388 states and 37277 transitions. [2021-08-21 18:50:26,263 INFO L78 Accepts]: Start accepts. Automaton has 12388 states and 37277 transitions. Word has length 37 [2021-08-21 18:50:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:26,264 INFO L470 AbstractCegarLoop]: Abstraction has 12388 states and 37277 transitions. [2021-08-21 18:50:26,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 12388 states and 37277 transitions. [2021-08-21 18:50:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:26,284 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:26,285 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:26,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:26,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 18:50:26,485 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash 156071744, now seen corresponding path program 45 times [2021-08-21 18:50:26,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:26,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135828243] [2021-08-21 18:50:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:26,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:26,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:26,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135828243] [2021-08-21 18:50:26,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135828243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:26,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053657294] [2021-08-21 18:50:26,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:26,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:26,542 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:26,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:50:27,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:50:27,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:27,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:50:27,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:27,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053657294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:27,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:27,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2021-08-21 18:50:27,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508959548] [2021-08-21 18:50:27,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:50:27,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:50:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:50:27,543 INFO L87 Difference]: Start difference. First operand 12388 states and 37277 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:28,270 INFO L93 Difference]: Finished difference Result 27350 states and 78758 transitions. [2021-08-21 18:50:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:50:28,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:28,336 INFO L225 Difference]: With dead ends: 27350 [2021-08-21 18:50:28,336 INFO L226 Difference]: Without dead ends: 27081 [2021-08-21 18:50:28,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1023, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:50:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27081 states. [2021-08-21 18:50:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27081 to 24162. [2021-08-21 18:50:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24162 states, 24161 states have (on average 2.9902321923761432) internal successors, (72247), 24161 states have internal predecessors, (72247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24162 states to 24162 states and 72247 transitions. [2021-08-21 18:50:28,840 INFO L78 Accepts]: Start accepts. Automaton has 24162 states and 72247 transitions. Word has length 37 [2021-08-21 18:50:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:28,840 INFO L470 AbstractCegarLoop]: Abstraction has 24162 states and 72247 transitions. [2021-08-21 18:50:28,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 24162 states and 72247 transitions. [2021-08-21 18:50:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:28,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:28,881 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:28,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:29,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 18:50:29,081 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1333002048, now seen corresponding path program 46 times [2021-08-21 18:50:29,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:29,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231744979] [2021-08-21 18:50:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:29,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:29,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:29,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231744979] [2021-08-21 18:50:29,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231744979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:29,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396174095] [2021-08-21 18:50:29,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:29,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:29,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:29,260 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:29,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:50:30,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:30,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:30,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:50:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:30,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396174095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:30,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:30,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 18:50:30,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039423869] [2021-08-21 18:50:30,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:50:30,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:50:30,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:50:30,433 INFO L87 Difference]: Start difference. First operand 24162 states and 72247 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:30,827 INFO L93 Difference]: Finished difference Result 25003 states and 74145 transitions. [2021-08-21 18:50:30,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:50:30,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:30,886 INFO L225 Difference]: With dead ends: 25003 [2021-08-21 18:50:30,887 INFO L226 Difference]: Without dead ends: 24994 [2021-08-21 18:50:30,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:50:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24994 states. [2021-08-21 18:50:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24994 to 24263. [2021-08-21 18:50:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24263 states, 24262 states have (on average 2.9918803066523783) internal successors, (72589), 24262 states have internal predecessors, (72589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24263 states to 24263 states and 72589 transitions. [2021-08-21 18:50:31,435 INFO L78 Accepts]: Start accepts. Automaton has 24263 states and 72589 transitions. Word has length 37 [2021-08-21 18:50:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:31,435 INFO L470 AbstractCegarLoop]: Abstraction has 24263 states and 72589 transitions. [2021-08-21 18:50:31,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 24263 states and 72589 transitions. [2021-08-21 18:50:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:31,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:31,479 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:31,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:31,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:31,679 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash 855673152, now seen corresponding path program 47 times [2021-08-21 18:50:31,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:31,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530387514] [2021-08-21 18:50:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:31,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:31,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:31,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530387514] [2021-08-21 18:50:31,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530387514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:31,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031154103] [2021-08-21 18:50:31,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:31,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:31,751 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:31,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:50:32,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:50:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:32,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:32,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031154103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:32,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:32,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:50:32,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926354961] [2021-08-21 18:50:32,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:50:32,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:50:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:50:32,807 INFO L87 Difference]: Start difference. First operand 24263 states and 72589 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:33,463 INFO L93 Difference]: Finished difference Result 46710 states and 138267 transitions. [2021-08-21 18:50:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:50:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:33,620 INFO L225 Difference]: With dead ends: 46710 [2021-08-21 18:50:33,620 INFO L226 Difference]: Without dead ends: 46710 [2021-08-21 18:50:33,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:50:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46710 states. [2021-08-21 18:50:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46710 to 30671. [2021-08-21 18:50:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30671 states, 30670 states have (on average 3.0366481904140854) internal successors, (93134), 30670 states have internal predecessors, (93134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30671 states to 30671 states and 93134 transitions. [2021-08-21 18:50:34,610 INFO L78 Accepts]: Start accepts. Automaton has 30671 states and 93134 transitions. Word has length 37 [2021-08-21 18:50:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:34,610 INFO L470 AbstractCegarLoop]: Abstraction has 30671 states and 93134 transitions. [2021-08-21 18:50:34,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 30671 states and 93134 transitions. [2021-08-21 18:50:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:34,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:34,770 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:34,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 18:50:34,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:34,970 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:34,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:34,971 INFO L82 PathProgramCache]: Analyzing trace with hash 525727620, now seen corresponding path program 48 times [2021-08-21 18:50:34,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:34,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746002776] [2021-08-21 18:50:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:34,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:35,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:35,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746002776] [2021-08-21 18:50:35,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746002776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:35,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789548671] [2021-08-21 18:50:35,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:35,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:35,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:35,030 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:35,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:50:35,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:50:35,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:35,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:50:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:36,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789548671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:36,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:36,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2021-08-21 18:50:36,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783507400] [2021-08-21 18:50:36,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:50:36,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:36,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:50:36,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:50:36,153 INFO L87 Difference]: Start difference. First operand 30671 states and 93134 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:36,982 INFO L93 Difference]: Finished difference Result 47830 states and 139665 transitions. [2021-08-21 18:50:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:50:36,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:37,119 INFO L225 Difference]: With dead ends: 47830 [2021-08-21 18:50:37,119 INFO L226 Difference]: Without dead ends: 47727 [2021-08-21 18:50:37,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 368.9ms TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:50:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47727 states. [2021-08-21 18:50:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47727 to 44089. [2021-08-21 18:50:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44089 states, 44088 states have (on average 2.987865178733442) internal successors, (131729), 44088 states have internal predecessors, (131729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44089 states to 44089 states and 131729 transitions. [2021-08-21 18:50:38,242 INFO L78 Accepts]: Start accepts. Automaton has 44089 states and 131729 transitions. Word has length 37 [2021-08-21 18:50:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:38,242 INFO L470 AbstractCegarLoop]: Abstraction has 44089 states and 131729 transitions. [2021-08-21 18:50:38,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 44089 states and 131729 transitions. [2021-08-21 18:50:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:38,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:38,326 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:38,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:50:38,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:38,537 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash 476038720, now seen corresponding path program 49 times [2021-08-21 18:50:38,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:38,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013801929] [2021-08-21 18:50:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:38,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:38,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:38,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013801929] [2021-08-21 18:50:38,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013801929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:38,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253234326] [2021-08-21 18:50:38,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:50:38,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:38,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:38,621 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:38,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:50:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:39,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:39,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:39,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253234326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:39,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:39,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 19 [2021-08-21 18:50:39,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909656304] [2021-08-21 18:50:39,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:50:39,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:50:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:50:39,998 INFO L87 Difference]: Start difference. First operand 44089 states and 131729 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:40,651 INFO L93 Difference]: Finished difference Result 47701 states and 139448 transitions. [2021-08-21 18:50:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:50:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:40,798 INFO L225 Difference]: With dead ends: 47701 [2021-08-21 18:50:40,799 INFO L226 Difference]: Without dead ends: 47690 [2021-08-21 18:50:40,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:50:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47690 states. [2021-08-21 18:50:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47690 to 44067. [2021-08-21 18:50:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44067 states, 44066 states have (on average 2.988244905369219) internal successors, (131680), 44066 states have internal predecessors, (131680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44067 states to 44067 states and 131680 transitions. [2021-08-21 18:50:41,932 INFO L78 Accepts]: Start accepts. Automaton has 44067 states and 131680 transitions. Word has length 37 [2021-08-21 18:50:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:41,932 INFO L470 AbstractCegarLoop]: Abstraction has 44067 states and 131680 transitions. [2021-08-21 18:50:41,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 44067 states and 131680 transitions. [2021-08-21 18:50:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:42,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:42,180 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:42,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:42,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 18:50:42,399 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -113104576, now seen corresponding path program 50 times [2021-08-21 18:50:42,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:42,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917666333] [2021-08-21 18:50:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:42,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:42,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:42,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917666333] [2021-08-21 18:50:42,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917666333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:42,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761159137] [2021-08-21 18:50:42,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:42,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:42,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:42,510 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:42,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:50:43,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:43,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:43,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761159137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:43,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:43,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 18:50:43,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167797346] [2021-08-21 18:50:43,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:50:43,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:43,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:50:43,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:50:43,833 INFO L87 Difference]: Start difference. First operand 44067 states and 131680 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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) [2021-08-21 18:50:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:44,550 INFO L93 Difference]: Finished difference Result 68356 states and 201737 transitions. [2021-08-21 18:50:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:50:44,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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) Word has length 37 [2021-08-21 18:50:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:44,781 INFO L225 Difference]: With dead ends: 68356 [2021-08-21 18:50:44,781 INFO L226 Difference]: Without dead ends: 68356 [2021-08-21 18:50:44,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:50:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68356 states. [2021-08-21 18:50:46,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68356 to 44661. [2021-08-21 18:50:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44661 states, 44660 states have (on average 2.9932154052843707) internal successors, (133677), 44660 states have internal predecessors, (133677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44661 states to 44661 states and 133677 transitions. [2021-08-21 18:50:46,454 INFO L78 Accepts]: Start accepts. Automaton has 44661 states and 133677 transitions. Word has length 37 [2021-08-21 18:50:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:46,454 INFO L470 AbstractCegarLoop]: Abstraction has 44661 states and 133677 transitions. [2021-08-21 18:50:46,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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) [2021-08-21 18:50:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 44661 states and 133677 transitions. [2021-08-21 18:50:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:46,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:46,542 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:46,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:46,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 18:50:46,749 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1236440648, now seen corresponding path program 51 times [2021-08-21 18:50:46,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:46,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981511022] [2021-08-21 18:50:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:46,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:47,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:47,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981511022] [2021-08-21 18:50:47,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981511022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:47,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652124019] [2021-08-21 18:50:47,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:47,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:47,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:47,089 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:47,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:50:48,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:50:48,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:48,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:50:48,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:48,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652124019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:48,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:48,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 18:50:48,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577646336] [2021-08-21 18:50:48,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:50:48,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:50:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:50:48,364 INFO L87 Difference]: Start difference. First operand 44661 states and 133677 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:48,940 INFO L93 Difference]: Finished difference Result 46431 states and 137595 transitions. [2021-08-21 18:50:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:50:48,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:49,073 INFO L225 Difference]: With dead ends: 46431 [2021-08-21 18:50:49,073 INFO L226 Difference]: Without dead ends: 46422 [2021-08-21 18:50:49,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:50:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46422 states. [2021-08-21 18:50:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46422 to 44698. [2021-08-21 18:50:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44698 states, 44697 states have (on average 2.9927288184889367) internal successors, (133766), 44697 states have internal predecessors, (133766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44698 states to 44698 states and 133766 transitions. [2021-08-21 18:50:50,325 INFO L78 Accepts]: Start accepts. Automaton has 44698 states and 133766 transitions. Word has length 37 [2021-08-21 18:50:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:50,325 INFO L470 AbstractCegarLoop]: Abstraction has 44698 states and 133766 transitions. [2021-08-21 18:50:50,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 44698 states and 133766 transitions. [2021-08-21 18:50:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:50,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:50,428 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:50,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:50,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:50,628 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash 879854980, now seen corresponding path program 52 times [2021-08-21 18:50:50,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:50,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493705992] [2021-08-21 18:50:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:50,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:50,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:50,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493705992] [2021-08-21 18:50:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493705992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:50,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899041941] [2021-08-21 18:50:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:50,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:50,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:50,720 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:50,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:50:51,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:51,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:50:51,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:52,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899041941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:52,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:52,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 17 [2021-08-21 18:50:52,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616733896] [2021-08-21 18:50:52,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:50:52,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:52,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:50:52,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:50:52,192 INFO L87 Difference]: Start difference. First operand 44698 states and 133766 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:52,877 INFO L93 Difference]: Finished difference Result 47317 states and 138934 transitions. [2021-08-21 18:50:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:50:52,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:53,019 INFO L225 Difference]: With dead ends: 47317 [2021-08-21 18:50:53,019 INFO L226 Difference]: Without dead ends: 47002 [2021-08-21 18:50:53,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:50:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47002 states. [2021-08-21 18:50:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47002 to 44722. [2021-08-21 18:50:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44722 states, 44721 states have (on average 2.9919053688423785) internal successors, (133801), 44721 states have internal predecessors, (133801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44722 states to 44722 states and 133801 transitions. [2021-08-21 18:50:54,162 INFO L78 Accepts]: Start accepts. Automaton has 44722 states and 133801 transitions. Word has length 37 [2021-08-21 18:50:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:54,162 INFO L470 AbstractCegarLoop]: Abstraction has 44722 states and 133801 transitions. [2021-08-21 18:50:54,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 44722 states and 133801 transitions. [2021-08-21 18:50:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:54,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:54,245 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:54,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:54,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 18:50:54,447 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:54,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2139969916, now seen corresponding path program 53 times [2021-08-21 18:50:54,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:54,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639306404] [2021-08-21 18:50:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:54,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:54,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:54,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639306404] [2021-08-21 18:50:54,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639306404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:54,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852663765] [2021-08-21 18:50:54,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:54,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:54,710 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:54,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:50:55,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:50:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:55,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:56,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852663765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:56,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:56,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-21 18:50:56,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700937948] [2021-08-21 18:50:56,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:50:56,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:50:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:50:56,042 INFO L87 Difference]: Start difference. First operand 44722 states and 133801 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:57,175 INFO L93 Difference]: Finished difference Result 61923 states and 179795 transitions. [2021-08-21 18:50:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:50:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:50:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:57,366 INFO L225 Difference]: With dead ends: 61923 [2021-08-21 18:50:57,367 INFO L226 Difference]: Without dead ends: 61444 [2021-08-21 18:50:57,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 515.8ms TimeCoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:50:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61444 states. [2021-08-21 18:50:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61444 to 57266. [2021-08-21 18:50:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57266 states, 57265 states have (on average 2.9786256875927704) internal successors, (170571), 57265 states have internal predecessors, (170571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57266 states to 57266 states and 170571 transitions. [2021-08-21 18:50:58,848 INFO L78 Accepts]: Start accepts. Automaton has 57266 states and 170571 transitions. Word has length 37 [2021-08-21 18:50:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:58,848 INFO L470 AbstractCegarLoop]: Abstraction has 57266 states and 170571 transitions. [2021-08-21 18:50:58,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57266 states and 170571 transitions. [2021-08-21 18:50:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:50:59,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:59,176 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:59,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:59,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 18:50:59,394 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2105308480, now seen corresponding path program 54 times [2021-08-21 18:50:59,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:59,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510618206] [2021-08-21 18:50:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:59,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:59,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:59,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510618206] [2021-08-21 18:50:59,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510618206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:59,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807440912] [2021-08-21 18:50:59,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:59,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:59,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:59,474 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:59,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:51:00,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:51:00,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:51:00,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:00,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807440912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:00,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:00,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-08-21 18:51:00,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852447123] [2021-08-21 18:51:00,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:51:00,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:51:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:51:00,832 INFO L87 Difference]: Start difference. First operand 57266 states and 170571 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2021-08-21 18:51:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:01,561 INFO L93 Difference]: Finished difference Result 59592 states and 175152 transitions. [2021-08-21 18:51:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:51:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) Word has length 37 [2021-08-21 18:51:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:01,761 INFO L225 Difference]: With dead ends: 59592 [2021-08-21 18:51:01,762 INFO L226 Difference]: Without dead ends: 59577 [2021-08-21 18:51:01,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:51:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59577 states. [2021-08-21 18:51:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59577 to 57254. [2021-08-21 18:51:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57254 states, 57253 states have (on average 2.978795870958727) internal successors, (170545), 57253 states have internal predecessors, (170545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57254 states to 57254 states and 170545 transitions. [2021-08-21 18:51:03,291 INFO L78 Accepts]: Start accepts. Automaton has 57254 states and 170545 transitions. Word has length 37 [2021-08-21 18:51:03,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:03,291 INFO L470 AbstractCegarLoop]: Abstraction has 57254 states and 170545 transitions. [2021-08-21 18:51:03,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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) [2021-08-21 18:51:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 57254 states and 170545 transitions. [2021-08-21 18:51:03,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:03,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:03,396 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:03,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:03,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:03,597 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:03,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:03,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1379192836, now seen corresponding path program 55 times [2021-08-21 18:51:03,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:03,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905009524] [2021-08-21 18:51:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:03,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:03,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:03,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905009524] [2021-08-21 18:51:03,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905009524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:03,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820238834] [2021-08-21 18:51:03,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:03,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:03,943 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:03,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:51:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:51:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:05,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820238834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:05,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:05,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 18:51:05,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845940456] [2021-08-21 18:51:05,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:51:05,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:51:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:51:05,256 INFO L87 Difference]: Start difference. First operand 57254 states and 170545 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:06,056 INFO L93 Difference]: Finished difference Result 58435 states and 173122 transitions. [2021-08-21 18:51:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:51:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:06,268 INFO L225 Difference]: With dead ends: 58435 [2021-08-21 18:51:06,268 INFO L226 Difference]: Without dead ends: 58426 [2021-08-21 18:51:06,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:51:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58426 states. [2021-08-21 18:51:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58426 to 57267. [2021-08-21 18:51:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57267 states, 57266 states have (on average 2.9788705339992316) internal successors, (170588), 57266 states have internal predecessors, (170588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57267 states to 57267 states and 170588 transitions. [2021-08-21 18:51:07,695 INFO L78 Accepts]: Start accepts. Automaton has 57267 states and 170588 transitions. Word has length 37 [2021-08-21 18:51:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:07,695 INFO L470 AbstractCegarLoop]: Abstraction has 57267 states and 170588 transitions. [2021-08-21 18:51:07,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:07,696 INFO L276 IsEmpty]: Start isEmpty. Operand 57267 states and 170588 transitions. [2021-08-21 18:51:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:07,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:07,813 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:07,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 18:51:08,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:08,017 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash -466466624, now seen corresponding path program 56 times [2021-08-21 18:51:08,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:08,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784760368] [2021-08-21 18:51:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:08,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:08,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:08,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784760368] [2021-08-21 18:51:08,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784760368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:08,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357262784] [2021-08-21 18:51:08,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:08,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:08,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:08,501 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:08,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:51:09,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:09,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:51:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:09,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357262784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:09,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:09,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 18:51:09,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473071600] [2021-08-21 18:51:09,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:51:09,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:51:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:51:09,877 INFO L87 Difference]: Start difference. First operand 57267 states and 170588 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:10,530 INFO L93 Difference]: Finished difference Result 57771 states and 171592 transitions. [2021-08-21 18:51:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:51:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:10,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:10,689 INFO L225 Difference]: With dead ends: 57771 [2021-08-21 18:51:10,690 INFO L226 Difference]: Without dead ends: 57762 [2021-08-21 18:51:10,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 477.3ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:51:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57762 states. [2021-08-21 18:51:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57762 to 57271. [2021-08-21 18:51:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57271 states, 57270 states have (on average 2.9787672428845817) internal successors, (170594), 57270 states have internal predecessors, (170594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57271 states to 57271 states and 170594 transitions. [2021-08-21 18:51:12,112 INFO L78 Accepts]: Start accepts. Automaton has 57271 states and 170594 transitions. Word has length 37 [2021-08-21 18:51:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:12,112 INFO L470 AbstractCegarLoop]: Abstraction has 57271 states and 170594 transitions. [2021-08-21 18:51:12,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:12,112 INFO L276 IsEmpty]: Start isEmpty. Operand 57271 states and 170594 transitions. [2021-08-21 18:51:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:12,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:12,235 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:12,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:12,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:51:12,436 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash -470280572, now seen corresponding path program 57 times [2021-08-21 18:51:12,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:12,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964256538] [2021-08-21 18:51:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:12,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:12,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:12,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964256538] [2021-08-21 18:51:12,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964256538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:12,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823709610] [2021-08-21 18:51:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:12,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:12,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:12,680 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:12,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:51:14,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:51:14,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:14,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:51:14,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:14,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823709610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:14,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:14,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 18:51:14,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201619495] [2021-08-21 18:51:14,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:51:14,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:14,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:51:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:51:14,306 INFO L87 Difference]: Start difference. First operand 57271 states and 170594 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:14,930 INFO L93 Difference]: Finished difference Result 58083 states and 172503 transitions. [2021-08-21 18:51:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:51:14,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:15,189 INFO L225 Difference]: With dead ends: 58083 [2021-08-21 18:51:15,190 INFO L226 Difference]: Without dead ends: 58074 [2021-08-21 18:51:15,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:51:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58074 states. [2021-08-21 18:51:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58074 to 57399. [2021-08-21 18:51:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57399 states, 57398 states have (on average 2.9798076588034426) internal successors, (171035), 57398 states have internal predecessors, (171035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57399 states to 57399 states and 171035 transitions. [2021-08-21 18:51:16,627 INFO L78 Accepts]: Start accepts. Automaton has 57399 states and 171035 transitions. Word has length 37 [2021-08-21 18:51:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:16,627 INFO L470 AbstractCegarLoop]: Abstraction has 57399 states and 171035 transitions. [2021-08-21 18:51:16,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 57399 states and 171035 transitions. [2021-08-21 18:51:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:16,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:16,750 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:16,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:16,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:16,951 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash 866026824, now seen corresponding path program 58 times [2021-08-21 18:51:16,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:16,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035567065] [2021-08-21 18:51:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:16,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:17,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:17,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035567065] [2021-08-21 18:51:17,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035567065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:17,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294121950] [2021-08-21 18:51:17,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:17,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:17,365 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:17,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:51:18,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:18,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:18,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:51:18,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:18,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294121950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:18,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:18,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 18:51:18,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867155426] [2021-08-21 18:51:18,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:51:18,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:51:18,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:51:18,694 INFO L87 Difference]: Start difference. First operand 57399 states and 171035 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:19,184 INFO L93 Difference]: Finished difference Result 58701 states and 174253 transitions. [2021-08-21 18:51:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:51:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:19,439 INFO L225 Difference]: With dead ends: 58701 [2021-08-21 18:51:19,439 INFO L226 Difference]: Without dead ends: 58681 [2021-08-21 18:51:19,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:51:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58681 states. [2021-08-21 18:51:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58681 to 57774. [2021-08-21 18:51:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57774 states, 57773 states have (on average 2.981669638066225) internal successors, (172260), 57773 states have internal predecessors, (172260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57774 states to 57774 states and 172260 transitions. [2021-08-21 18:51:20,843 INFO L78 Accepts]: Start accepts. Automaton has 57774 states and 172260 transitions. Word has length 37 [2021-08-21 18:51:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:20,843 INFO L470 AbstractCegarLoop]: Abstraction has 57774 states and 172260 transitions. [2021-08-21 18:51:20,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 57774 states and 172260 transitions. [2021-08-21 18:51:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:20,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:20,956 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:20,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:21,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 18:51:21,161 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:21,161 INFO L82 PathProgramCache]: Analyzing trace with hash -809145588, now seen corresponding path program 59 times [2021-08-21 18:51:21,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:21,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698530257] [2021-08-21 18:51:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:21,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:21,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:21,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698530257] [2021-08-21 18:51:21,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698530257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:21,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186794661] [2021-08-21 18:51:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:21,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:21,251 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:21,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:51:22,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:51:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 18:51:22,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:23,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186794661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:23,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:23,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-21 18:51:23,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185646796] [2021-08-21 18:51:23,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:51:23,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:51:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:51:23,093 INFO L87 Difference]: Start difference. First operand 57774 states and 172260 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:24,897 INFO L93 Difference]: Finished difference Result 95637 states and 275880 transitions. [2021-08-21 18:51:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:51:24,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:25,217 INFO L225 Difference]: With dead ends: 95637 [2021-08-21 18:51:25,217 INFO L226 Difference]: Without dead ends: 95033 [2021-08-21 18:51:25,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 970.0ms TimeCoverageRelationStatistics Valid=718, Invalid=3188, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:51:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95033 states. [2021-08-21 18:51:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95033 to 48951. [2021-08-21 18:51:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48951 states, 48950 states have (on average 3.0144637385086823) internal successors, (147558), 48950 states have internal predecessors, (147558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48951 states to 48951 states and 147558 transitions. [2021-08-21 18:51:26,947 INFO L78 Accepts]: Start accepts. Automaton has 48951 states and 147558 transitions. Word has length 37 [2021-08-21 18:51:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:26,948 INFO L470 AbstractCegarLoop]: Abstraction has 48951 states and 147558 transitions. [2021-08-21 18:51:26,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48951 states and 147558 transitions. [2021-08-21 18:51:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:27,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:27,048 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:27,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 18:51:27,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-21 18:51:27,249 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:27,249 INFO L82 PathProgramCache]: Analyzing trace with hash 992732096, now seen corresponding path program 60 times [2021-08-21 18:51:27,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:27,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162517344] [2021-08-21 18:51:27,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:27,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:27,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:27,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162517344] [2021-08-21 18:51:27,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162517344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:27,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389403391] [2021-08-21 18:51:27,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:51:27,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:27,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:27,539 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:27,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:51:28,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:51:28,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:28,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:51:28,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:28,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389403391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:28,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:28,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:51:28,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619881363] [2021-08-21 18:51:28,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:51:28,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:51:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:51:28,928 INFO L87 Difference]: Start difference. First operand 48951 states and 147558 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:29,753 INFO L93 Difference]: Finished difference Result 74622 states and 222138 transitions. [2021-08-21 18:51:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:51:29,754 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:30,010 INFO L225 Difference]: With dead ends: 74622 [2021-08-21 18:51:30,010 INFO L226 Difference]: Without dead ends: 74622 [2021-08-21 18:51:30,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:51:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74622 states. [2021-08-21 18:51:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74622 to 56562. [2021-08-21 18:51:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56562 states, 56561 states have (on average 3.0842099679991515) internal successors, (174446), 56561 states have internal predecessors, (174446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56562 states to 56562 states and 174446 transitions. [2021-08-21 18:51:31,827 INFO L78 Accepts]: Start accepts. Automaton has 56562 states and 174446 transitions. Word has length 37 [2021-08-21 18:51:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:31,828 INFO L470 AbstractCegarLoop]: Abstraction has 56562 states and 174446 transitions. [2021-08-21 18:51:31,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 56562 states and 174446 transitions. [2021-08-21 18:51:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:31,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:31,939 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:31,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:32,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:32,140 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:32,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:32,140 INFO L82 PathProgramCache]: Analyzing trace with hash 668300096, now seen corresponding path program 61 times [2021-08-21 18:51:32,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:32,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905470410] [2021-08-21 18:51:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:32,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:32,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:32,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905470410] [2021-08-21 18:51:32,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905470410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:32,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79241858] [2021-08-21 18:51:32,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:32,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:32,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:32,233 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:32,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:51:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:51:33,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:33,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79241858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:33,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:33,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-08-21 18:51:33,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859518029] [2021-08-21 18:51:33,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:51:33,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:51:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:51:33,713 INFO L87 Difference]: Start difference. First operand 56562 states and 174446 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:34,440 INFO L93 Difference]: Finished difference Result 76268 states and 234185 transitions. [2021-08-21 18:51:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:51:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:34,692 INFO L225 Difference]: With dead ends: 76268 [2021-08-21 18:51:34,692 INFO L226 Difference]: Without dead ends: 76268 [2021-08-21 18:51:34,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:51:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76268 states. [2021-08-21 18:51:36,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76268 to 56739. [2021-08-21 18:51:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56739 states, 56738 states have (on average 3.0857802530931653) internal successors, (175081), 56738 states have internal predecessors, (175081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56739 states to 56739 states and 175081 transitions. [2021-08-21 18:51:36,524 INFO L78 Accepts]: Start accepts. Automaton has 56739 states and 175081 transitions. Word has length 37 [2021-08-21 18:51:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:36,524 INFO L470 AbstractCegarLoop]: Abstraction has 56739 states and 175081 transitions. [2021-08-21 18:51:36,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 56739 states and 175081 transitions. [2021-08-21 18:51:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:36,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:36,643 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:36,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 18:51:36,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:36,844 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1710895108, now seen corresponding path program 62 times [2021-08-21 18:51:36,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:36,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361062729] [2021-08-21 18:51:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:36,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:36,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:36,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361062729] [2021-08-21 18:51:36,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361062729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:36,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533404321] [2021-08-21 18:51:36,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:36,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:36,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:36,926 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:36,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:51:38,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:38,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:38,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:51:38,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:38,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533404321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:38,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:38,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:51:38,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705183495] [2021-08-21 18:51:38,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:51:38,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:51:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:51:38,662 INFO L87 Difference]: Start difference. First operand 56739 states and 175081 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:39,751 INFO L93 Difference]: Finished difference Result 93901 states and 289139 transitions. [2021-08-21 18:51:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:51:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:40,083 INFO L225 Difference]: With dead ends: 93901 [2021-08-21 18:51:40,083 INFO L226 Difference]: Without dead ends: 93901 [2021-08-21 18:51:40,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:51:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93901 states. [2021-08-21 18:51:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93901 to 81428. [2021-08-21 18:51:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81428 states, 81427 states have (on average 3.170471710857578) internal successors, (258162), 81427 states have internal predecessors, (258162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81428 states to 81428 states and 258162 transitions. [2021-08-21 18:51:42,659 INFO L78 Accepts]: Start accepts. Automaton has 81428 states and 258162 transitions. Word has length 37 [2021-08-21 18:51:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:42,659 INFO L470 AbstractCegarLoop]: Abstraction has 81428 states and 258162 transitions. [2021-08-21 18:51:42,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 81428 states and 258162 transitions. [2021-08-21 18:51:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:42,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:42,825 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:42,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 18:51:43,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 18:51:43,026 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 243437700, now seen corresponding path program 63 times [2021-08-21 18:51:43,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:43,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555097624] [2021-08-21 18:51:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:43,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:43,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:43,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555097624] [2021-08-21 18:51:43,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555097624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:43,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476479479] [2021-08-21 18:51:43,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:43,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:43,429 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:43,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:51:44,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:51:44,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:44,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:51:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:44,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476479479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:44,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:44,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-21 18:51:44,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081541524] [2021-08-21 18:51:44,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:51:44,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:51:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:51:44,940 INFO L87 Difference]: Start difference. First operand 81428 states and 258162 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:45,870 INFO L93 Difference]: Finished difference Result 105158 states and 330930 transitions. [2021-08-21 18:51:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:51:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:46,247 INFO L225 Difference]: With dead ends: 105158 [2021-08-21 18:51:46,248 INFO L226 Difference]: Without dead ends: 105158 [2021-08-21 18:51:46,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:51:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105158 states. [2021-08-21 18:51:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105158 to 81483. [2021-08-21 18:51:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81483 states, 81482 states have (on average 3.170896639748656) internal successors, (258371), 81482 states have internal predecessors, (258371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:48,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81483 states to 81483 states and 258371 transitions. [2021-08-21 18:51:48,860 INFO L78 Accepts]: Start accepts. Automaton has 81483 states and 258371 transitions. Word has length 37 [2021-08-21 18:51:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:48,860 INFO L470 AbstractCegarLoop]: Abstraction has 81483 states and 258371 transitions. [2021-08-21 18:51:48,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 81483 states and 258371 transitions. [2021-08-21 18:51:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:49,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:49,020 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:49,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 18:51:49,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 18:51:49,220 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash -185380424, now seen corresponding path program 64 times [2021-08-21 18:51:49,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:49,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42855095] [2021-08-21 18:51:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:49,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:49,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:49,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42855095] [2021-08-21 18:51:49,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42855095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:49,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406874682] [2021-08-21 18:51:49,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:49,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:49,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:49,629 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:49,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:51:50,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:50,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:50,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:51:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:51,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406874682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:51,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:51,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-21 18:51:51,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162978969] [2021-08-21 18:51:51,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:51:51,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:51:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:51:51,130 INFO L87 Difference]: Start difference. First operand 81483 states and 258371 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:52,039 INFO L93 Difference]: Finished difference Result 120203 states and 382803 transitions. [2021-08-21 18:51:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:51:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:52,503 INFO L225 Difference]: With dead ends: 120203 [2021-08-21 18:51:52,503 INFO L226 Difference]: Without dead ends: 120203 [2021-08-21 18:51:52,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:51:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120203 states. [2021-08-21 18:51:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120203 to 85917. [2021-08-21 18:51:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85917 states, 85916 states have (on average 3.183947111131803) internal successors, (273552), 85916 states have internal predecessors, (273552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85917 states to 85917 states and 273552 transitions. [2021-08-21 18:51:55,547 INFO L78 Accepts]: Start accepts. Automaton has 85917 states and 273552 transitions. Word has length 37 [2021-08-21 18:51:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:55,547 INFO L470 AbstractCegarLoop]: Abstraction has 85917 states and 273552 transitions. [2021-08-21 18:51:55,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 85917 states and 273552 transitions. [2021-08-21 18:51:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:51:56,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:56,005 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:56,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:56,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:56,217 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash -610242820, now seen corresponding path program 65 times [2021-08-21 18:51:56,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:56,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645165850] [2021-08-21 18:51:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:56,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:56,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:56,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645165850] [2021-08-21 18:51:56,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645165850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:56,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059835820] [2021-08-21 18:51:56,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:56,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:56,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:56,297 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:56,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:51:57,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:51:57,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:51:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:51:57,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059835820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:57,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:57,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:51:57,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025896232] [2021-08-21 18:51:57,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:51:57,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:51:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:51:57,825 INFO L87 Difference]: Start difference. First operand 85917 states and 273552 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:59,625 INFO L93 Difference]: Finished difference Result 210781 states and 671170 transitions. [2021-08-21 18:51:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:51:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:51:59,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:00,825 INFO L225 Difference]: With dead ends: 210781 [2021-08-21 18:52:00,825 INFO L226 Difference]: Without dead ends: 210781 [2021-08-21 18:52:00,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:52:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210781 states. [2021-08-21 18:52:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210781 to 179524. [2021-08-21 18:52:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179524 states, 179523 states have (on average 3.252040128562914) internal successors, (583816), 179523 states have internal predecessors, (583816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179524 states to 179524 states and 583816 transitions. [2021-08-21 18:52:07,230 INFO L78 Accepts]: Start accepts. Automaton has 179524 states and 583816 transitions. Word has length 37 [2021-08-21 18:52:07,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:07,230 INFO L470 AbstractCegarLoop]: Abstraction has 179524 states and 583816 transitions. [2021-08-21 18:52:07,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,230 INFO L276 IsEmpty]: Start isEmpty. Operand 179524 states and 583816 transitions. [2021-08-21 18:52:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:52:07,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:07,936 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:07,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:08,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 18:52:08,153 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:08,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1756687296, now seen corresponding path program 66 times [2021-08-21 18:52:08,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:08,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180699303] [2021-08-21 18:52:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:08,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:08,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:08,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180699303] [2021-08-21 18:52:08,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180699303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:08,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108505878] [2021-08-21 18:52:08,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:52:08,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:08,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:08,340 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:08,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:52:09,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:52:09,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:52:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108505878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:09,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:09,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 18:52:09,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932831234] [2021-08-21 18:52:09,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:52:09,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:52:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:52:09,942 INFO L87 Difference]: Start difference. First operand 179524 states and 583816 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:11,755 INFO L93 Difference]: Finished difference Result 184069 states and 595453 transitions. [2021-08-21 18:52:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:52:11,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:52:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:12,807 INFO L225 Difference]: With dead ends: 184069 [2021-08-21 18:52:12,807 INFO L226 Difference]: Without dead ends: 184049 [2021-08-21 18:52:12,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:52:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184049 states. [2021-08-21 18:52:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184049 to 181023. [2021-08-21 18:52:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181023 states, 181022 states have (on average 3.251383809702688) internal successors, (588572), 181022 states have internal predecessors, (588572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181023 states to 181023 states and 588572 transitions. [2021-08-21 18:52:18,446 INFO L78 Accepts]: Start accepts. Automaton has 181023 states and 588572 transitions. Word has length 37 [2021-08-21 18:52:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:18,446 INFO L470 AbstractCegarLoop]: Abstraction has 181023 states and 588572 transitions. [2021-08-21 18:52:18,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 181023 states and 588572 transitions. [2021-08-21 18:52:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:52:19,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:19,177 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:19,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:19,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 18:52:19,377 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:19,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1416479936, now seen corresponding path program 67 times [2021-08-21 18:52:19,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:19,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852071879] [2021-08-21 18:52:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:19,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:19,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:19,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852071879] [2021-08-21 18:52:19,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852071879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:19,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698870187] [2021-08-21 18:52:19,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:52:19,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:19,437 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:19,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:52:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 18:52:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:20,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698870187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:20,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:20,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-08-21 18:52:20,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298356408] [2021-08-21 18:52:20,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:52:20,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:52:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:52:20,998 INFO L87 Difference]: Start difference. First operand 181023 states and 588572 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:23,138 INFO L93 Difference]: Finished difference Result 217181 states and 684799 transitions. [2021-08-21 18:52:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:52:23,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:52:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:24,342 INFO L225 Difference]: With dead ends: 217181 [2021-08-21 18:52:24,343 INFO L226 Difference]: Without dead ends: 216994 [2021-08-21 18:52:24,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:52:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216994 states. [2021-08-21 18:52:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216994 to 202557. [2021-08-21 18:52:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202557 states, 202556 states have (on average 3.191428543217678) internal successors, (646443), 202556 states have internal predecessors, (646443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202557 states to 202557 states and 646443 transitions. [2021-08-21 18:52:30,931 INFO L78 Accepts]: Start accepts. Automaton has 202557 states and 646443 transitions. Word has length 37 [2021-08-21 18:52:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:30,931 INFO L470 AbstractCegarLoop]: Abstraction has 202557 states and 646443 transitions. [2021-08-21 18:52:30,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:30,932 INFO L276 IsEmpty]: Start isEmpty. Operand 202557 states and 646443 transitions. [2021-08-21 18:52:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:52:31,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:31,698 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:31,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:31,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:31,913 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:31,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:31,913 INFO L82 PathProgramCache]: Analyzing trace with hash -816858364, now seen corresponding path program 68 times [2021-08-21 18:52:31,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:31,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669716205] [2021-08-21 18:52:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:31,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:32,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:32,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669716205] [2021-08-21 18:52:32,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669716205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:32,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905296030] [2021-08-21 18:52:32,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:32,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:32,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:32,102 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:32,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:52:33,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:33,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:33,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:52:33,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:33,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905296030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:33,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:33,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 18:52:33,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447305319] [2021-08-21 18:52:33,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:52:33,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:52:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:52:33,743 INFO L87 Difference]: Start difference. First operand 202557 states and 646443 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:35,473 INFO L93 Difference]: Finished difference Result 205645 states and 653389 transitions. [2021-08-21 18:52:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:52:35,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:52:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:36,667 INFO L225 Difference]: With dead ends: 205645 [2021-08-21 18:52:36,667 INFO L226 Difference]: Without dead ends: 205636 [2021-08-21 18:52:36,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:52:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205636 states. [2021-08-21 18:52:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205636 to 202574. [2021-08-21 18:52:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202574 states, 202573 states have (on average 3.1913680500362833) internal successors, (646485), 202573 states have internal predecessors, (646485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202574 states to 202574 states and 646485 transitions. [2021-08-21 18:52:43,486 INFO L78 Accepts]: Start accepts. Automaton has 202574 states and 646485 transitions. Word has length 37 [2021-08-21 18:52:43,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:43,486 INFO L470 AbstractCegarLoop]: Abstraction has 202574 states and 646485 transitions. [2021-08-21 18:52:43,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 202574 states and 646485 transitions. [2021-08-21 18:52:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:52:44,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:44,302 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:44,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:44,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-21 18:52:44,517 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1173444032, now seen corresponding path program 69 times [2021-08-21 18:52:44,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:44,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393660851] [2021-08-21 18:52:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:44,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:44,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:44,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393660851] [2021-08-21 18:52:44,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393660851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:44,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806152612] [2021-08-21 18:52:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:44,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:44,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:44,637 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:44,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process