/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/popl20-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:42:46,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:42:46,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:42:46,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 20:42:46,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 20:42:46,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:42:46,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:42:46,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:42:46,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:42:46,708 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:42:46,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:42:46,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:42:46,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:42:46,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:42:46,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:42:46,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:42:46,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:42:46,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:42:46,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:42:46,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:42:46,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:42:46,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:42:46,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:42:46,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:42:46,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:42:46,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:42:46,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:42:46,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:42:46,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:42:46,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:42:46,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:42:46,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:42:46,712 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:42:46,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:42:46,712 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:42:46,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:42:47,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:42:47,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:42:47,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:42:47,084 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:42:47,085 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:42:47,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-08-06 20:42:47,086 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-08-06 20:42:47,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:42:47,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:42:47,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:42:47,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:42:47,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:42:47,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:42:47,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:42:47,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:42:47,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:42:47,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:42:47,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:42:47,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:42:47,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:42:47,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/1) ... [2021-08-06 20:42:47,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:42:47,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:47,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 20:42:47,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 20:42:47,266 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:42:47,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:42:47,267 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:42:47,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:42:47,267 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:42:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:42:47,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:42:47,268 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:42:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:42:47,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:42:47,269 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:42:47,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:42:47,434 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:42:47,436 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:42:47 BoogieIcfgContainer [2021-08-06 20:42:47,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:42:47,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:42:47,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:42:47,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:42:47,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:42:47" (1/2) ... [2021-08-06 20:42:47,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f13c13 and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:42:47, skipping insertion in model container [2021-08-06 20:42:47,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:42:47" (2/2) ... [2021-08-06 20:42:47,442 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-08-06 20:42:47,446 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:42:47,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:42:47,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:42:47,446 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:42:47,478 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:42:47,512 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:42:47,517 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 20:42:47,517 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:42:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 82 states have (on average 1.7195121951219512) internal successors, (141), 114 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) [2021-08-06 20:42:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 20:42:47,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:47,650 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] [2021-08-06 20:42:47,651 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash -452719472, now seen corresponding path program 1 times [2021-08-06 20:42:47,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:47,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108964215] [2021-08-06 20:42:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:47,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:47,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:47,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108964215] [2021-08-06 20:42:47,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108964215] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:42:47,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:42:47,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:42:47,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164812166] [2021-08-06 20:42:47,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:42:47,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:42:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:42:47,943 INFO L87 Difference]: Start difference. First operand has 115 states, 82 states have (on average 1.7195121951219512) internal successors, (141), 114 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) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:48,013 INFO L93 Difference]: Finished difference Result 410 states and 507 transitions. [2021-08-06 20:42:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:42:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 20:42:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:48,025 INFO L225 Difference]: With dead ends: 410 [2021-08-06 20:42:48,025 INFO L226 Difference]: Without dead ends: 125 [2021-08-06 20:42:48,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:42:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-06 20:42:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 48. [2021-08-06 20:42:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2021-08-06 20:42:48,067 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 21 [2021-08-06 20:42:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:48,068 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2021-08-06 20:42:48,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2021-08-06 20:42:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:42:48,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:48,070 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] [2021-08-06 20:42:48,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:42:48,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:48,074 INFO L82 PathProgramCache]: Analyzing trace with hash 261677170, now seen corresponding path program 1 times [2021-08-06 20:42:48,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:48,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568937022] [2021-08-06 20:42:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:48,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:48,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:48,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568937022] [2021-08-06 20:42:48,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568937022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:48,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718250903] [2021-08-06 20:42:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:48,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:48,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:48,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:42:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:48,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:42:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:48,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:42:48,691 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:42:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:48,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718250903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:48,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:48,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 20:42:48,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929070033] [2021-08-06 20:42:48,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:42:48,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:48,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:42:48,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:42:48,728 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:48,909 INFO L93 Difference]: Finished difference Result 145 states and 226 transitions. [2021-08-06 20:42:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:42:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:42:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:48,911 INFO L225 Difference]: With dead ends: 145 [2021-08-06 20:42:48,911 INFO L226 Difference]: Without dead ends: 145 [2021-08-06 20:42:48,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:42:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-06 20:42:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 49. [2021-08-06 20:42:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 80 transitions. [2021-08-06 20:42:48,923 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 80 transitions. Word has length 23 [2021-08-06 20:42:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:48,924 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 80 transitions. [2021-08-06 20:42:48,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 80 transitions. [2021-08-06 20:42:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:42:48,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:48,925 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] [2021-08-06 20:42:48,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:49,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:49,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1888085358, now seen corresponding path program 1 times [2021-08-06 20:42:49,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:49,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131351687] [2021-08-06 20:42:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:49,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:49,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:49,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131351687] [2021-08-06 20:42:49,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131351687] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:42:49,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:42:49,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:42:49,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980201384] [2021-08-06 20:42:49,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:42:49,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:49,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:42:49,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:42:49,211 INFO L87 Difference]: Start difference. First operand 49 states and 80 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:49,259 INFO L93 Difference]: Finished difference Result 105 states and 177 transitions. [2021-08-06 20:42:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:42:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 [2021-08-06 20:42:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:49,261 INFO L225 Difference]: With dead ends: 105 [2021-08-06 20:42:49,261 INFO L226 Difference]: Without dead ends: 105 [2021-08-06 20:42:49,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:42:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-06 20:42:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 60. [2021-08-06 20:42:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.7966101694915255) internal successors, (106), 59 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 106 transitions. [2021-08-06 20:42:49,275 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 106 transitions. Word has length 23 [2021-08-06 20:42:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:49,275 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 106 transitions. [2021-08-06 20:42:49,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 106 transitions. [2021-08-06 20:42:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:42:49,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:49,280 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] [2021-08-06 20:42:49,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:42:49,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash 396080626, now seen corresponding path program 2 times [2021-08-06 20:42:49,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:49,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264521535] [2021-08-06 20:42:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:49,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:49,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:49,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264521535] [2021-08-06 20:42:49,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264521535] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:42:49,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:42:49,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:42:49,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113675770] [2021-08-06 20:42:49,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:42:49,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:42:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:42:49,350 INFO L87 Difference]: Start difference. First operand 60 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:49,410 INFO L93 Difference]: Finished difference Result 86 states and 141 transitions. [2021-08-06 20:42:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:42:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 [2021-08-06 20:42:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:49,411 INFO L225 Difference]: With dead ends: 86 [2021-08-06 20:42:49,412 INFO L226 Difference]: Without dead ends: 84 [2021-08-06 20:42:49,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:42:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-06 20:42:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-08-06 20:42:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.7462686567164178) internal successors, (117), 67 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 117 transitions. [2021-08-06 20:42:49,421 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 117 transitions. Word has length 23 [2021-08-06 20:42:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:49,421 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 117 transitions. [2021-08-06 20:42:49,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 117 transitions. [2021-08-06 20:42:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:42:49,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:49,422 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] [2021-08-06 20:42:49,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 20:42:49,423 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:49,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1352900078, now seen corresponding path program 1 times [2021-08-06 20:42:49,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:49,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000964442] [2021-08-06 20:42:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:49,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:49,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:49,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000964442] [2021-08-06 20:42:49,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000964442] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:42:49,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:42:49,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 20:42:49,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854329628] [2021-08-06 20:42:49,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:42:49,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:49,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:42:49,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:42:49,501 INFO L87 Difference]: Start difference. First operand 68 states and 117 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:49,552 INFO L93 Difference]: Finished difference Result 82 states and 139 transitions. [2021-08-06 20:42:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:42:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 [2021-08-06 20:42:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:49,554 INFO L225 Difference]: With dead ends: 82 [2021-08-06 20:42:49,554 INFO L226 Difference]: Without dead ends: 80 [2021-08-06 20:42:49,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:42:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-06 20:42:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-08-06 20:42:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 65 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 113 transitions. [2021-08-06 20:42:49,564 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 113 transitions. Word has length 23 [2021-08-06 20:42:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:49,564 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 113 transitions. [2021-08-06 20:42:49,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 113 transitions. [2021-08-06 20:42:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:42:49,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:49,565 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] [2021-08-06 20:42:49,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 20:42:49,565 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:49,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1749600786, now seen corresponding path program 2 times [2021-08-06 20:42:49,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:49,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974719490] [2021-08-06 20:42:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:49,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:49,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:49,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974719490] [2021-08-06 20:42:49,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974719490] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:42:49,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:42:49,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 20:42:49,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860649500] [2021-08-06 20:42:49,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:42:49,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:49,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:42:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:42:49,634 INFO L87 Difference]: Start difference. First operand 66 states and 113 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:49,708 INFO L93 Difference]: Finished difference Result 74 states and 128 transitions. [2021-08-06 20:42:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:42:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:42:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:49,713 INFO L225 Difference]: With dead ends: 74 [2021-08-06 20:42:49,713 INFO L226 Difference]: Without dead ends: 74 [2021-08-06 20:42:49,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:42:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-06 20:42:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2021-08-06 20:42:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.736842105263158) internal successors, (99), 57 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 99 transitions. [2021-08-06 20:42:49,716 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 99 transitions. Word has length 23 [2021-08-06 20:42:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:49,716 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 99 transitions. [2021-08-06 20:42:49,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 99 transitions. [2021-08-06 20:42:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:42:49,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:49,717 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] [2021-08-06 20:42:49,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 20:42:49,717 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1228490960, now seen corresponding path program 1 times [2021-08-06 20:42:49,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:49,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984159738] [2021-08-06 20:42:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:49,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:49,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 50.0 percent of original size [2021-08-06 20:42:49,893 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 50.0 percent of original size [2021-08-06 20:42:49,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 50.3 percent of original size [2021-08-06 20:42:49,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 50.3 percent of original size [2021-08-06 20:42:50,068 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 56.8 percent of original size [2021-08-06 20:42:50,096 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 56.8 percent of original size [2021-08-06 20:42:50,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 57.8 percent of original size [2021-08-06 20:42:50,205 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 57.8 percent of original size [2021-08-06 20:42:50,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 79.0 percent of original size [2021-08-06 20:42:50,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 79.0 percent of original size [2021-08-06 20:42:50,416 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 20:42:50,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 20:42:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:50,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:50,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984159738] [2021-08-06 20:42:50,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984159738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:50,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401585247] [2021-08-06 20:42:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:50,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:50,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:50,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:50,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:42:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 20:42:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:50,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:42:50,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:42:50,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.1 percent of original size [2021-08-06 20:42:50,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.1 percent of original size [2021-08-06 20:42:51,074 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:42:51,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 55 [2021-08-06 20:42:51,732 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:51,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:51,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401585247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:51,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:51,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 20:42:51,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857976542] [2021-08-06 20:42:51,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:42:51,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:42:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:42:51,763 INFO L87 Difference]: Start difference. First operand 58 states and 99 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:52,911 INFO L93 Difference]: Finished difference Result 169 states and 272 transitions. [2021-08-06 20:42:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:42:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:42:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:52,913 INFO L225 Difference]: With dead ends: 169 [2021-08-06 20:42:52,913 INFO L226 Difference]: Without dead ends: 164 [2021-08-06 20:42:52,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1171.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:42:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-06 20:42:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 70. [2021-08-06 20:42:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.8405797101449275) internal successors, (127), 69 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 127 transitions. [2021-08-06 20:42:52,917 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 127 transitions. Word has length 25 [2021-08-06 20:42:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:52,917 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 127 transitions. [2021-08-06 20:42:52,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2021-08-06 20:42:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:42:52,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:52,918 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] [2021-08-06 20:42:52,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:53,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-06 20:42:53,133 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:53,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:53,133 INFO L82 PathProgramCache]: Analyzing trace with hash 693305680, now seen corresponding path program 1 times [2021-08-06 20:42:53,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:53,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717148614] [2021-08-06 20:42:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:53,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:53,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:53,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717148614] [2021-08-06 20:42:53,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717148614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:53,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563719941] [2021-08-06 20:42:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:53,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:53,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:53,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:53,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:42:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 20:42:53,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:53,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 89.7 percent of original size [2021-08-06 20:42:53,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 89.7 percent of original size [2021-08-06 20:42:53,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 20:42:53,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.7 percent of original size [2021-08-06 20:42:53,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-08-06 20:42:54,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:54,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:54,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563719941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:54,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:54,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 20:42:54,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870515832] [2021-08-06 20:42:54,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:42:54,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:42:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:42:54,101 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:42:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:54,157 INFO L93 Difference]: Finished difference Result 133 states and 223 transitions. [2021-08-06 20:42:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:42:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) 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 25 [2021-08-06 20:42:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:54,158 INFO L225 Difference]: With dead ends: 133 [2021-08-06 20:42:54,159 INFO L226 Difference]: Without dead ends: 128 [2021-08-06 20:42:54,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:42:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-06 20:42:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 75. [2021-08-06 20:42:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 74 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 137 transitions. [2021-08-06 20:42:54,162 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 137 transitions. Word has length 25 [2021-08-06 20:42:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:54,162 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 137 transitions. [2021-08-06 20:42:54,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:42:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 137 transitions. [2021-08-06 20:42:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:42:54,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:54,163 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, 1, 1] [2021-08-06 20:42:54,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:54,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:54,385 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:54,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1494091568, now seen corresponding path program 2 times [2021-08-06 20:42:54,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:54,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473045911] [2021-08-06 20:42:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:54,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:54,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 50.0 percent of original size [2021-08-06 20:42:54,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 50.0 percent of original size [2021-08-06 20:42:54,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 50.3 percent of original size [2021-08-06 20:42:54,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 50.3 percent of original size [2021-08-06 20:42:54,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 56.8 percent of original size [2021-08-06 20:42:54,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 56.8 percent of original size [2021-08-06 20:42:54,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 57.8 percent of original size [2021-08-06 20:42:54,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 57.8 percent of original size [2021-08-06 20:42:54,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 79.0 percent of original size [2021-08-06 20:42:54,846 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 79.0 percent of original size [2021-08-06 20:42:54,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 82.8 percent of original size [2021-08-06 20:42:54,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 82.8 percent of original size [2021-08-06 20:42:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:54,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:54,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473045911] [2021-08-06 20:42:54,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473045911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:54,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092826909] [2021-08-06 20:42:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:42:54,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:54,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:54,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:54,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:42:55,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:42:55,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:55,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:42:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:55,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.1 percent of original size [2021-08-06 20:42:55,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.1 percent of original size [2021-08-06 20:42:55,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.1 percent of original size [2021-08-06 20:42:55,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.1 percent of original size [2021-08-06 20:42:55,846 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:42:55,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 37 [2021-08-06 20:42:56,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:56,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:56,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092826909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:56,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:56,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 20:42:56,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929247881] [2021-08-06 20:42:56,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:42:56,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:42:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:42:56,042 INFO L87 Difference]: Start difference. First operand 75 states and 137 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:56,368 INFO L93 Difference]: Finished difference Result 114 states and 190 transitions. [2021-08-06 20:42:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:42:56,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:42:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:56,369 INFO L225 Difference]: With dead ends: 114 [2021-08-06 20:42:56,369 INFO L226 Difference]: Without dead ends: 109 [2021-08-06 20:42:56,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 501.7ms TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:42:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-06 20:42:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2021-08-06 20:42:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.8205128205128205) internal successors, (142), 78 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 142 transitions. [2021-08-06 20:42:56,373 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 142 transitions. Word has length 25 [2021-08-06 20:42:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:56,373 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 142 transitions. [2021-08-06 20:42:56,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 142 transitions. [2021-08-06 20:42:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:42:56,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:56,374 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] [2021-08-06 20:42:56,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-06 20:42:56,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:56,594 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash -416165360, now seen corresponding path program 2 times [2021-08-06 20:42:56,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:56,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231874936] [2021-08-06 20:42:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:56,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:56,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:56,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231874936] [2021-08-06 20:42:56,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231874936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:56,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951704631] [2021-08-06 20:42:56,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:42:56,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:56,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:56,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:56,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:42:56,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:42:56,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 20:42:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:57,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 89.7 percent of original size [2021-08-06 20:42:57,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 89.7 percent of original size [2021-08-06 20:42:57,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 20:42:57,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.2 percent of original size [2021-08-06 20:42:57,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-08-06 20:42:57,481 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:57,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:57,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951704631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:57,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:57,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 20:42:57,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277337246] [2021-08-06 20:42:57,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:42:57,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:57,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:42:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:42:57,504 INFO L87 Difference]: Start difference. First operand 79 states and 142 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:42:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:57,578 INFO L93 Difference]: Finished difference Result 136 states and 233 transitions. [2021-08-06 20:42:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:42:57,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) 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 25 [2021-08-06 20:42:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:57,579 INFO L225 Difference]: With dead ends: 136 [2021-08-06 20:42:57,579 INFO L226 Difference]: Without dead ends: 131 [2021-08-06 20:42:57,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:42:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-06 20:42:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 87. [2021-08-06 20:42:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.8488372093023255) internal successors, (159), 86 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) [2021-08-06 20:42:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 159 transitions. [2021-08-06 20:42:57,584 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 159 transitions. Word has length 25 [2021-08-06 20:42:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:57,584 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 159 transitions. [2021-08-06 20:42:57,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:42:57,585 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 159 transitions. [2021-08-06 20:42:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:42:57,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:57,585 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] [2021-08-06 20:42:57,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:57,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 20:42:57,793 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:57,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2141741108, now seen corresponding path program 3 times [2021-08-06 20:42:57,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:57,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72567910] [2021-08-06 20:42:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:57,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:57,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 50.0 percent of original size [2021-08-06 20:42:57,875 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 50.0 percent of original size [2021-08-06 20:42:57,920 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 50.3 percent of original size [2021-08-06 20:42:57,945 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 50.3 percent of original size [2021-08-06 20:42:58,002 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 50.7 percent of original size [2021-08-06 20:42:58,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 50.7 percent of original size [2021-08-06 20:42:58,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 57.1 percent of original size [2021-08-06 20:42:58,110 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 57.1 percent of original size [2021-08-06 20:42:58,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 74.6 percent of original size [2021-08-06 20:42:58,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 74.6 percent of original size [2021-08-06 20:42:58,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.2 percent of original size [2021-08-06 20:42:58,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.2 percent of original size [2021-08-06 20:42:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:58,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:58,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72567910] [2021-08-06 20:42:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72567910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:58,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281432855] [2021-08-06 20:42:58,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:42:58,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:58,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:58,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:58,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:42:58,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:42:58,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:42:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:58,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.1 percent of original size [2021-08-06 20:42:58,862 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.1 percent of original size [2021-08-06 20:42:58,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.8 percent of original size [2021-08-06 20:42:58,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.8 percent of original size [2021-08-06 20:42:58,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:42:58,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:42:58,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:42:58,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 51 [2021-08-06 20:42:59,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:59,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:42:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:59,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281432855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:59,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:59,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:42:59,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485337049] [2021-08-06 20:42:59,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:42:59,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:42:59,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:42:59,430 INFO L87 Difference]: Start difference. First operand 87 states and 159 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:59,749 INFO L93 Difference]: Finished difference Result 146 states and 251 transitions. [2021-08-06 20:42:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:42:59,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:42:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:59,751 INFO L225 Difference]: With dead ends: 146 [2021-08-06 20:42:59,751 INFO L226 Difference]: Without dead ends: 141 [2021-08-06 20:42:59,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 445.3ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:42:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-06 20:42:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 89. [2021-08-06 20:42:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.8295454545454546) internal successors, (161), 88 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 161 transitions. [2021-08-06 20:42:59,755 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 161 transitions. Word has length 25 [2021-08-06 20:42:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:59,755 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 161 transitions. [2021-08-06 20:42:59,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 161 transitions. [2021-08-06 20:42:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:42:59,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:59,756 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] [2021-08-06 20:42:59,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:59,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:59,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:59,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1281533006, now seen corresponding path program 4 times [2021-08-06 20:42:59,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:59,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225136677] [2021-08-06 20:42:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:59,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:00,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:00,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225136677] [2021-08-06 20:43:00,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225136677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:00,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422796407] [2021-08-06 20:43:00,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:43:00,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:00,054 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:00,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:43:00,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:43:00,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:00,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:43:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:00,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:00,622 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:00,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422796407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:00,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:00,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:43:00,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988375064] [2021-08-06 20:43:00,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:43:00,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:00,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:43:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:00,649 INFO L87 Difference]: Start difference. First operand 89 states and 161 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:43:01,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:01,000 INFO L93 Difference]: Finished difference Result 287 states and 495 transitions. [2021-08-06 20:43:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:43:01,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 27 [2021-08-06 20:43:01,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:01,002 INFO L225 Difference]: With dead ends: 287 [2021-08-06 20:43:01,002 INFO L226 Difference]: Without dead ends: 287 [2021-08-06 20:43:01,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:43:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-06 20:43:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 107. [2021-08-06 20:43:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.9622641509433962) internal successors, (208), 106 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 208 transitions. [2021-08-06 20:43:01,007 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 208 transitions. Word has length 27 [2021-08-06 20:43:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:01,008 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 208 transitions. [2021-08-06 20:43:01,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:43:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 208 transitions. [2021-08-06 20:43:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:01,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:01,009 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] [2021-08-06 20:43:01,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:01,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:01,230 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:01,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:01,231 INFO L82 PathProgramCache]: Analyzing trace with hash 290851762, now seen corresponding path program 5 times [2021-08-06 20:43:01,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:01,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955301238] [2021-08-06 20:43:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:01,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:01,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:01,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955301238] [2021-08-06 20:43:01,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955301238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:01,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417391274] [2021-08-06 20:43:01,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:43:01,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:01,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:01,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:43:01,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:43:01,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:43:01,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:01,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:01,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:01,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417391274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:01,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:01,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:43:01,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375099795] [2021-08-06 20:43:01,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:43:01,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:43:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:43:01,864 INFO L87 Difference]: Start difference. First operand 107 states and 208 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:43:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:02,025 INFO L93 Difference]: Finished difference Result 212 states and 371 transitions. [2021-08-06 20:43:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:43:02,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 27 [2021-08-06 20:43:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:02,027 INFO L225 Difference]: With dead ends: 212 [2021-08-06 20:43:02,027 INFO L226 Difference]: Without dead ends: 212 [2021-08-06 20:43:02,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:43:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-06 20:43:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 105. [2021-08-06 20:43:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.9423076923076923) internal successors, (202), 104 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 202 transitions. [2021-08-06 20:43:02,031 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 202 transitions. Word has length 27 [2021-08-06 20:43:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:02,031 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 202 transitions. [2021-08-06 20:43:02,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:43:02,031 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 202 transitions. [2021-08-06 20:43:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:02,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:02,032 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] [2021-08-06 20:43:02,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:02,244 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,SelfDestructingSolverStorable12 [2021-08-06 20:43:02,245 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1671360082, now seen corresponding path program 6 times [2021-08-06 20:43:02,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:02,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803098197] [2021-08-06 20:43:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:02,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:02,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:02,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803098197] [2021-08-06 20:43:02,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803098197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:02,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069336568] [2021-08-06 20:43:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:43:02,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:02,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:02,303 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:02,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:43:02,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:43:02,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:02,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:43:02,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:02,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069336568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:02,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:02,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:43:02,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985869950] [2021-08-06 20:43:02,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:43:02,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:43:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:02,871 INFO L87 Difference]: Start difference. First operand 105 states and 202 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) [2021-08-06 20:43:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:03,140 INFO L93 Difference]: Finished difference Result 307 states and 551 transitions. [2021-08-06 20:43:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:43:03,144 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 27 [2021-08-06 20:43:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:03,146 INFO L225 Difference]: With dead ends: 307 [2021-08-06 20:43:03,146 INFO L226 Difference]: Without dead ends: 307 [2021-08-06 20:43:03,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:43:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-06 20:43:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 155. [2021-08-06 20:43:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.0259740259740258) internal successors, (312), 154 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 312 transitions. [2021-08-06 20:43:03,156 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 312 transitions. Word has length 27 [2021-08-06 20:43:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:03,157 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 312 transitions. [2021-08-06 20:43:03,157 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) [2021-08-06 20:43:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 312 transitions. [2021-08-06 20:43:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:03,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:03,158 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] [2021-08-06 20:43:03,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:03,372 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,SelfDestructingSolverStorable13 [2021-08-06 20:43:03,373 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash -356797778, now seen corresponding path program 7 times [2021-08-06 20:43:03,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:03,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823683123] [2021-08-06 20:43:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:03,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:03,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:03,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823683123] [2021-08-06 20:43:03,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823683123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:03,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890571221] [2021-08-06 20:43:03,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:43:03,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:03,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:03,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:03,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:43:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:03,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:43:03,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:04,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:04,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:04,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890571221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:04,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:04,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:43:04,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981515929] [2021-08-06 20:43:04,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:43:04,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:04,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:43:04,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:04,038 INFO L87 Difference]: Start difference. First operand 155 states and 312 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:43:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:04,567 INFO L93 Difference]: Finished difference Result 592 states and 1029 transitions. [2021-08-06 20:43:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:43:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 27 [2021-08-06 20:43:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:04,570 INFO L225 Difference]: With dead ends: 592 [2021-08-06 20:43:04,570 INFO L226 Difference]: Without dead ends: 592 [2021-08-06 20:43:04,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:43:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-06 20:43:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 175. [2021-08-06 20:43:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1091954022988504) internal successors, (367), 174 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 367 transitions. [2021-08-06 20:43:04,578 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 367 transitions. Word has length 27 [2021-08-06 20:43:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:04,578 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 367 transitions. [2021-08-06 20:43:04,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:43:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 367 transitions. [2021-08-06 20:43:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:04,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:04,579 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] [2021-08-06 20:43:04,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:04,795 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,SelfDestructingSolverStorable14 [2021-08-06 20:43:04,795 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1131602482, now seen corresponding path program 8 times [2021-08-06 20:43:04,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:04,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652416211] [2021-08-06 20:43:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:04,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:04,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:04,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652416211] [2021-08-06 20:43:04,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652416211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:04,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965075475] [2021-08-06 20:43:04,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:43:04,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:04,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:04,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:04,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:43:05,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:05,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:05,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:43:05,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:05,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965075475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:05,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:05,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:43:05,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827047681] [2021-08-06 20:43:05,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:43:05,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:05,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:43:05,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:05,470 INFO L87 Difference]: Start difference. First operand 175 states and 367 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:05,652 INFO L93 Difference]: Finished difference Result 323 states and 591 transitions. [2021-08-06 20:43:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:43:05,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:43:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:05,654 INFO L225 Difference]: With dead ends: 323 [2021-08-06 20:43:05,654 INFO L226 Difference]: Without dead ends: 321 [2021-08-06 20:43:05,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:43:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-06 20:43:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-08-06 20:43:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.076923076923077) internal successors, (378), 182 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 378 transitions. [2021-08-06 20:43:05,661 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 378 transitions. Word has length 27 [2021-08-06 20:43:05,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:05,661 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 378 transitions. [2021-08-06 20:43:05,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 378 transitions. [2021-08-06 20:43:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:05,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:05,662 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] [2021-08-06 20:43:05,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:05,880 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,SelfDestructingSolverStorable15 [2021-08-06 20:43:05,881 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2088421934, now seen corresponding path program 1 times [2021-08-06 20:43:05,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:05,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371341314] [2021-08-06 20:43:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:05,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:05,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:05,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371341314] [2021-08-06 20:43:05,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371341314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:05,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262334658] [2021-08-06 20:43:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:05,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:05,945 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:05,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:43:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:06,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:06,526 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:43:06,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:43:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:06,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262334658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:06,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:06,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 20:43:06,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886770286] [2021-08-06 20:43:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:43:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:43:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:43:06,565 INFO L87 Difference]: Start difference. First operand 183 states and 378 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:06,733 INFO L93 Difference]: Finished difference Result 389 states and 753 transitions. [2021-08-06 20:43:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:43:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 27 [2021-08-06 20:43:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:06,735 INFO L225 Difference]: With dead ends: 389 [2021-08-06 20:43:06,735 INFO L226 Difference]: Without dead ends: 387 [2021-08-06 20:43:06,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:43:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-08-06 20:43:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 259. [2021-08-06 20:43:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.135658914728682) internal successors, (551), 258 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 551 transitions. [2021-08-06 20:43:06,745 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 551 transitions. Word has length 27 [2021-08-06 20:43:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:06,745 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 551 transitions. [2021-08-06 20:43:06,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 551 transitions. [2021-08-06 20:43:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:06,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:06,746 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] [2021-08-06 20:43:06,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:06,960 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,SelfDestructingSolverStorable16 [2021-08-06 20:43:06,960 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:06,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1014078930, now seen corresponding path program 2 times [2021-08-06 20:43:06,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:06,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720049684] [2021-08-06 20:43:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:06,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:07,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:07,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720049684] [2021-08-06 20:43:07,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720049684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:07,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263212375] [2021-08-06 20:43:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:43:07,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:07,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:07,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:07,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:43:07,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:07,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:07,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:07,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:07,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:07,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:07,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263212375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:07,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:07,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 20:43:07,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244215803] [2021-08-06 20:43:07,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:43:07,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:43:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:43:07,649 INFO L87 Difference]: Start difference. First operand 259 states and 551 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:07,895 INFO L93 Difference]: Finished difference Result 437 states and 828 transitions. [2021-08-06 20:43:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:43:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 27 [2021-08-06 20:43:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:07,897 INFO L225 Difference]: With dead ends: 437 [2021-08-06 20:43:07,897 INFO L226 Difference]: Without dead ends: 437 [2021-08-06 20:43:07,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:43:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-06 20:43:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 262. [2021-08-06 20:43:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.1226053639846745) internal successors, (554), 261 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 554 transitions. [2021-08-06 20:43:07,905 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 554 transitions. Word has length 27 [2021-08-06 20:43:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:07,906 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 554 transitions. [2021-08-06 20:43:07,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:07,906 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 554 transitions. [2021-08-06 20:43:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:07,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:07,907 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] [2021-08-06 20:43:07,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:08,126 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,SelfDestructingSolverStorable17 [2021-08-06 20:43:08,126 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1834131894, now seen corresponding path program 9 times [2021-08-06 20:43:08,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:08,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8296378] [2021-08-06 20:43:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:08,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:08,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:08,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8296378] [2021-08-06 20:43:08,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8296378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:08,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675911640] [2021-08-06 20:43:08,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:43:08,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:08,198 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:08,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:43:08,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:43:08,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:08,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:43:08,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:08,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675911640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:08,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:08,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:43:08,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297356964] [2021-08-06 20:43:08,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:43:08,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:43:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:08,800 INFO L87 Difference]: Start difference. First operand 262 states and 554 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:08,951 INFO L93 Difference]: Finished difference Result 337 states and 667 transitions. [2021-08-06 20:43:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:43:08,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:43:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:08,952 INFO L225 Difference]: With dead ends: 337 [2021-08-06 20:43:08,953 INFO L226 Difference]: Without dead ends: 331 [2021-08-06 20:43:08,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:43:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-08-06 20:43:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 286. [2021-08-06 20:43:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.094736842105263) internal successors, (597), 285 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) [2021-08-06 20:43:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 597 transitions. [2021-08-06 20:43:08,961 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 597 transitions. Word has length 27 [2021-08-06 20:43:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:08,962 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 597 transitions. [2021-08-06 20:43:08,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 597 transitions. [2021-08-06 20:43:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:08,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:08,963 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] [2021-08-06 20:43:08,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:09,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:09,177 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1504015950, now seen corresponding path program 3 times [2021-08-06 20:43:09,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:09,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655512032] [2021-08-06 20:43:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:09,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:09,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:09,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655512032] [2021-08-06 20:43:09,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655512032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:09,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967747553] [2021-08-06 20:43:09,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:43:09,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:09,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:09,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:09,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:43:09,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:43:09,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:09,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:43:09,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:43:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:09,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967747553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:09,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:09,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 20:43:09,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968004247] [2021-08-06 20:43:09,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:43:09,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:43:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:43:09,889 INFO L87 Difference]: Start difference. First operand 286 states and 597 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:10,032 INFO L93 Difference]: Finished difference Result 408 states and 783 transitions. [2021-08-06 20:43:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:43:10,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:43:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:10,034 INFO L225 Difference]: With dead ends: 408 [2021-08-06 20:43:10,034 INFO L226 Difference]: Without dead ends: 404 [2021-08-06 20:43:10,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:43:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-08-06 20:43:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 294. [2021-08-06 20:43:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.0955631399317407) internal successors, (614), 293 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 614 transitions. [2021-08-06 20:43:10,043 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 614 transitions. Word has length 27 [2021-08-06 20:43:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:10,043 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 614 transitions. [2021-08-06 20:43:10,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 614 transitions. [2021-08-06 20:43:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:10,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:10,045 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] [2021-08-06 20:43:10,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:10,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:10,261 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1237835250, now seen corresponding path program 4 times [2021-08-06 20:43:10,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:10,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279208273] [2021-08-06 20:43:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:10,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:10,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:10,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279208273] [2021-08-06 20:43:10,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279208273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:10,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081345404] [2021-08-06 20:43:10,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:43:10,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:10,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:10,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:10,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:43:10,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:43:10,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:10,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:10,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:10,957 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:10,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:11,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081345404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:11,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:11,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 20:43:11,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235960974] [2021-08-06 20:43:11,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:43:11,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:11,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:43:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:43:11,001 INFO L87 Difference]: Start difference. First operand 294 states and 614 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:11,101 INFO L93 Difference]: Finished difference Result 384 states and 741 transitions. [2021-08-06 20:43:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:43:11,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 27 [2021-08-06 20:43:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:11,119 INFO L225 Difference]: With dead ends: 384 [2021-08-06 20:43:11,119 INFO L226 Difference]: Without dead ends: 382 [2021-08-06 20:43:11,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:43:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-06 20:43:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 284. [2021-08-06 20:43:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.1095406360424027) internal successors, (597), 283 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) [2021-08-06 20:43:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 597 transitions. [2021-08-06 20:43:11,126 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 597 transitions. Word has length 27 [2021-08-06 20:43:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:11,126 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 597 transitions. [2021-08-06 20:43:11,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 597 transitions. [2021-08-06 20:43:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:11,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:11,128 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] [2021-08-06 20:43:11,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-06 20:43:11,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:11,353 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:11,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1123523922, now seen corresponding path program 3 times [2021-08-06 20:43:11,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:11,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928718146] [2021-08-06 20:43:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:11,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:11,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:11,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928718146] [2021-08-06 20:43:11,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928718146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:11,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030839387] [2021-08-06 20:43:11,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:43:11,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:11,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:11,407 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:11,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:43:11,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:43:11,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:11,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:11,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:11,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:43:11,996 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:43:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:12,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030839387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:12,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:12,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 20:43:12,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485702705] [2021-08-06 20:43:12,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:43:12,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:43:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:43:12,045 INFO L87 Difference]: Start difference. First operand 284 states and 597 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-08-06 20:43:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:12,145 INFO L93 Difference]: Finished difference Result 370 states and 715 transitions. [2021-08-06 20:43:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:43:12,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 27 [2021-08-06 20:43:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:12,147 INFO L225 Difference]: With dead ends: 370 [2021-08-06 20:43:12,147 INFO L226 Difference]: Without dead ends: 364 [2021-08-06 20:43:12,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-06 20:43:12,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 284. [2021-08-06 20:43:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.1130742049469964) internal successors, (598), 283 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 598 transitions. [2021-08-06 20:43:12,155 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 598 transitions. Word has length 27 [2021-08-06 20:43:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:12,155 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 598 transitions. [2021-08-06 20:43:12,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-08-06 20:43:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 598 transitions. [2021-08-06 20:43:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:12,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:12,156 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] [2021-08-06 20:43:12,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:12,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:12,377 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash 796347634, now seen corresponding path program 5 times [2021-08-06 20:43:12,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:12,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367255455] [2021-08-06 20:43:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:12,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:12,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:12,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367255455] [2021-08-06 20:43:12,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367255455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:12,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303425758] [2021-08-06 20:43:12,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:43:12,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:12,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:12,439 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:12,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:43:12,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:12,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:12,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:13,065 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:13,065 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:13,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303425758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:13,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:13,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:43:13,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347591707] [2021-08-06 20:43:13,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:43:13,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:43:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:43:13,103 INFO L87 Difference]: Start difference. First operand 284 states and 598 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:13,251 INFO L93 Difference]: Finished difference Result 387 states and 746 transitions. [2021-08-06 20:43:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:43:13,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:43:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:13,253 INFO L225 Difference]: With dead ends: 387 [2021-08-06 20:43:13,253 INFO L226 Difference]: Without dead ends: 387 [2021-08-06 20:43:13,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:43:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-08-06 20:43:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 276. [2021-08-06 20:43:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1163636363636362) internal successors, (582), 275 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 582 transitions. [2021-08-06 20:43:13,261 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 582 transitions. Word has length 27 [2021-08-06 20:43:13,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:13,261 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 582 transitions. [2021-08-06 20:43:13,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 582 transitions. [2021-08-06 20:43:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:13,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:13,262 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] [2021-08-06 20:43:13,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:13,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:13,485 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1418597042, now seen corresponding path program 6 times [2021-08-06 20:43:13,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:13,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342749726] [2021-08-06 20:43:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:13,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:13,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:13,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342749726] [2021-08-06 20:43:13,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342749726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:13,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483269091] [2021-08-06 20:43:13,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:43:13,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:13,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:13,531 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:13,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:43:13,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 20:43:13,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:13,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:13,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:14,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:14,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:14,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483269091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:14,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:14,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:43:14,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283665944] [2021-08-06 20:43:14,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:43:14,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:14,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:43:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:43:14,166 INFO L87 Difference]: Start difference. First operand 276 states and 582 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:14,275 INFO L93 Difference]: Finished difference Result 340 states and 660 transitions. [2021-08-06 20:43:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:43:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:43:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:14,277 INFO L225 Difference]: With dead ends: 340 [2021-08-06 20:43:14,277 INFO L226 Difference]: Without dead ends: 336 [2021-08-06 20:43:14,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:43:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-08-06 20:43:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 272. [2021-08-06 20:43:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.114391143911439) internal successors, (573), 271 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 573 transitions. [2021-08-06 20:43:14,284 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 573 transitions. Word has length 27 [2021-08-06 20:43:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:14,284 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 573 transitions. [2021-08-06 20:43:14,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 573 transitions. [2021-08-06 20:43:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:14,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:14,285 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] [2021-08-06 20:43:14,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:14,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:14,486 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash -727084370, now seen corresponding path program 4 times [2021-08-06 20:43:14,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:14,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566142977] [2021-08-06 20:43:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:14,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:14,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:14,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566142977] [2021-08-06 20:43:14,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566142977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:14,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540702397] [2021-08-06 20:43:14,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:43:14,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:14,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:14,530 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:14,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:43:15,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:43:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:15,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:15,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:15,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:15,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540702397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:15,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:15,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-06 20:43:15,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511325132] [2021-08-06 20:43:15,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:43:15,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:15,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:43:15,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:43:15,210 INFO L87 Difference]: Start difference. First operand 272 states and 573 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-08-06 20:43:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:15,298 INFO L93 Difference]: Finished difference Result 337 states and 671 transitions. [2021-08-06 20:43:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:43:15,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 27 [2021-08-06 20:43:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:15,300 INFO L225 Difference]: With dead ends: 337 [2021-08-06 20:43:15,300 INFO L226 Difference]: Without dead ends: 337 [2021-08-06 20:43:15,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-06 20:43:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 280. [2021-08-06 20:43:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.118279569892473) internal successors, (591), 279 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 591 transitions. [2021-08-06 20:43:15,306 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 591 transitions. Word has length 27 [2021-08-06 20:43:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:15,307 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 591 transitions. [2021-08-06 20:43:15,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-08-06 20:43:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 591 transitions. [2021-08-06 20:43:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:15,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:15,308 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] [2021-08-06 20:43:15,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:15,520 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,SelfDestructingSolverStorable24 [2021-08-06 20:43:15,521 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1030440434, now seen corresponding path program 5 times [2021-08-06 20:43:15,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:15,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755904148] [2021-08-06 20:43:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:15,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:15,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:15,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755904148] [2021-08-06 20:43:15,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755904148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:15,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833612031] [2021-08-06 20:43:15,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:43:15,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:15,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:15,579 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:15,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:43:16,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:43:16,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:16,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:43:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:16,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:16,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:43:16,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833612031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:16,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:16,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 20:43:16,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420930833] [2021-08-06 20:43:16,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:43:16,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:43:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:43:16,291 INFO L87 Difference]: Start difference. First operand 280 states and 591 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:43:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:16,602 INFO L93 Difference]: Finished difference Result 830 states and 1529 transitions. [2021-08-06 20:43:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:43:16,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2021-08-06 20:43:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:16,605 INFO L225 Difference]: With dead ends: 830 [2021-08-06 20:43:16,605 INFO L226 Difference]: Without dead ends: 830 [2021-08-06 20:43:16,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:43:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-06 20:43:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 354. [2021-08-06 20:43:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.2124645892351276) internal successors, (781), 353 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 781 transitions. [2021-08-06 20:43:16,616 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 781 transitions. Word has length 27 [2021-08-06 20:43:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:16,617 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 781 transitions. [2021-08-06 20:43:16,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:43:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 781 transitions. [2021-08-06 20:43:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:16,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:16,618 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] [2021-08-06 20:43:16,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:16,832 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,SelfDestructingSolverStorable25 [2021-08-06 20:43:16,832 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:16,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:16,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1638118674, now seen corresponding path program 7 times [2021-08-06 20:43:16,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:16,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373549581] [2021-08-06 20:43:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:16,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:16,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:16,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373549581] [2021-08-06 20:43:16,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373549581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:16,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601113154] [2021-08-06 20:43:16,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:43:16,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:16,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:16,905 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:16,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:43:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:17,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:17,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:17,586 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:17,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601113154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:17,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:17,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:43:17,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901729120] [2021-08-06 20:43:17,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:43:17,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:43:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:43:17,636 INFO L87 Difference]: Start difference. First operand 354 states and 781 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:17,781 INFO L93 Difference]: Finished difference Result 505 states and 1050 transitions. [2021-08-06 20:43:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:43:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:43:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:17,783 INFO L225 Difference]: With dead ends: 505 [2021-08-06 20:43:17,783 INFO L226 Difference]: Without dead ends: 505 [2021-08-06 20:43:17,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:43:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-06 20:43:17,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 415. [2021-08-06 20:43:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.2246376811594204) internal successors, (921), 414 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 921 transitions. [2021-08-06 20:43:17,792 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 921 transitions. Word has length 27 [2021-08-06 20:43:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:17,792 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 921 transitions. [2021-08-06 20:43:17,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 921 transitions. [2021-08-06 20:43:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:17,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:17,794 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] [2021-08-06 20:43:17,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:18,016 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,SelfDestructingSolverStorable26 [2021-08-06 20:43:18,017 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1164843890, now seen corresponding path program 8 times [2021-08-06 20:43:18,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:18,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695193703] [2021-08-06 20:43:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:18,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:18,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:18,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695193703] [2021-08-06 20:43:18,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695193703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:18,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419076547] [2021-08-06 20:43:18,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:43:18,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:18,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:18,071 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:18,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:43:18,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:18,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:18,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:18,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:18,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:18,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:18,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419076547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:18,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:18,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:43:18,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120372731] [2021-08-06 20:43:18,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:43:18,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:18,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:43:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:43:18,749 INFO L87 Difference]: Start difference. First operand 415 states and 921 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:18,827 INFO L93 Difference]: Finished difference Result 456 states and 963 transitions. [2021-08-06 20:43:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:43:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:43:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:18,828 INFO L225 Difference]: With dead ends: 456 [2021-08-06 20:43:18,828 INFO L226 Difference]: Without dead ends: 454 [2021-08-06 20:43:18,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-06 20:43:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 407. [2021-08-06 20:43:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.229064039408867) internal successors, (905), 406 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 905 transitions. [2021-08-06 20:43:18,836 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 905 transitions. Word has length 27 [2021-08-06 20:43:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:18,837 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 905 transitions. [2021-08-06 20:43:18,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 905 transitions. [2021-08-06 20:43:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:18,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:18,838 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] [2021-08-06 20:43:18,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:19,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:19,054 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:19,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:19,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2121663342, now seen corresponding path program 6 times [2021-08-06 20:43:19,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:19,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159173281] [2021-08-06 20:43:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:19,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:19,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:19,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159173281] [2021-08-06 20:43:19,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159173281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:19,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851916750] [2021-08-06 20:43:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:43:19,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:19,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:19,106 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:19,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:43:19,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 20:43:19,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:19,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:19,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:43:19,793 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:43:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:43:19,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851916750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:19,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:19,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-06 20:43:19,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287606514] [2021-08-06 20:43:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:43:19,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:19,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:43:19,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:43:19,830 INFO L87 Difference]: Start difference. First operand 407 states and 905 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-08-06 20:43:19,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:19,896 INFO L93 Difference]: Finished difference Result 520 states and 1099 transitions. [2021-08-06 20:43:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:43:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 27 [2021-08-06 20:43:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:19,898 INFO L225 Difference]: With dead ends: 520 [2021-08-06 20:43:19,898 INFO L226 Difference]: Without dead ends: 518 [2021-08-06 20:43:19,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:43:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-06 20:43:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 419. [2021-08-06 20:43:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.2392344497607657) internal successors, (936), 418 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 936 transitions. [2021-08-06 20:43:19,907 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 936 transitions. Word has length 27 [2021-08-06 20:43:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:19,907 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 936 transitions. [2021-08-06 20:43:19,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-08-06 20:43:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 936 transitions. [2021-08-06 20:43:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:19,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:19,909 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] [2021-08-06 20:43:19,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 20:43:20,131 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,SelfDestructingSolverStorable28 [2021-08-06 20:43:20,131 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:20,132 INFO L82 PathProgramCache]: Analyzing trace with hash -980837522, now seen corresponding path program 7 times [2021-08-06 20:43:20,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:20,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578043065] [2021-08-06 20:43:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:20,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:20,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:20,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578043065] [2021-08-06 20:43:20,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578043065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:20,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876664624] [2021-08-06 20:43:20,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:43:20,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:20,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:20,180 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:20,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:43:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:20,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:20,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:20,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:43:20,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876664624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:20,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:20,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-06 20:43:20,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37532979] [2021-08-06 20:43:20,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:43:20,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:43:20,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:43:20,919 INFO L87 Difference]: Start difference. First operand 419 states and 936 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-08-06 20:43:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:21,019 INFO L93 Difference]: Finished difference Result 503 states and 1077 transitions. [2021-08-06 20:43:21,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:43:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 27 [2021-08-06 20:43:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:21,020 INFO L225 Difference]: With dead ends: 503 [2021-08-06 20:43:21,021 INFO L226 Difference]: Without dead ends: 503 [2021-08-06 20:43:21,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:43:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-06 20:43:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 393. [2021-08-06 20:43:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.201530612244898) internal successors, (863), 392 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 863 transitions. [2021-08-06 20:43:21,028 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 863 transitions. Word has length 27 [2021-08-06 20:43:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:21,028 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 863 transitions. [2021-08-06 20:43:21,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-08-06 20:43:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 863 transitions. [2021-08-06 20:43:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:21,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:21,029 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] [2021-08-06 20:43:21,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:21,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:21,245 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1012192302, now seen corresponding path program 8 times [2021-08-06 20:43:21,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:21,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640280560] [2021-08-06 20:43:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:21,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:21,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:21,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640280560] [2021-08-06 20:43:21,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640280560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:21,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118577945] [2021-08-06 20:43:21,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:43:21,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:21,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:21,291 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:21,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:43:21,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:21,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:21,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:21,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:21,996 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:22,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118577945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:22,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:22,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 20:43:22,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423969363] [2021-08-06 20:43:22,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:43:22,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:43:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:43:22,041 INFO L87 Difference]: Start difference. First operand 393 states and 863 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-08-06 20:43:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:22,152 INFO L93 Difference]: Finished difference Result 525 states and 1120 transitions. [2021-08-06 20:43:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:43:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 27 [2021-08-06 20:43:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:22,155 INFO L225 Difference]: With dead ends: 525 [2021-08-06 20:43:22,155 INFO L226 Difference]: Without dead ends: 525 [2021-08-06 20:43:22,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:43:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-06 20:43:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 482. [2021-08-06 20:43:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.187110187110187) internal successors, (1052), 481 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1052 transitions. [2021-08-06 20:43:22,164 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1052 transitions. Word has length 27 [2021-08-06 20:43:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:22,164 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1052 transitions. [2021-08-06 20:43:22,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-08-06 20:43:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1052 transitions. [2021-08-06 20:43:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:22,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:22,166 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] [2021-08-06 20:43:22,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:22,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-06 20:43:22,381 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash 778958062, now seen corresponding path program 9 times [2021-08-06 20:43:22,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:22,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693523068] [2021-08-06 20:43:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:22,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:22,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:22,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693523068] [2021-08-06 20:43:22,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693523068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:22,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666993383] [2021-08-06 20:43:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:43:22,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:22,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:22,441 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:22,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:43:23,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:43:23,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:23,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:23,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:23,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:23,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666993383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:23,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:23,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:43:23,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430661552] [2021-08-06 20:43:23,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:43:23,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:43:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:43:23,206 INFO L87 Difference]: Start difference. First operand 482 states and 1052 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:23,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:23,371 INFO L93 Difference]: Finished difference Result 518 states and 1122 transitions. [2021-08-06 20:43:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:43:23,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 27 [2021-08-06 20:43:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:23,373 INFO L225 Difference]: With dead ends: 518 [2021-08-06 20:43:23,373 INFO L226 Difference]: Without dead ends: 518 [2021-08-06 20:43:23,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:43:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-06 20:43:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 482. [2021-08-06 20:43:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.187110187110187) internal successors, (1052), 481 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1052 transitions. [2021-08-06 20:43:23,381 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1052 transitions. Word has length 27 [2021-08-06 20:43:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:23,381 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1052 transitions. [2021-08-06 20:43:23,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1052 transitions. [2021-08-06 20:43:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:43:23,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:23,383 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] [2021-08-06 20:43:23,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:23,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:23,593 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2042748270, now seen corresponding path program 10 times [2021-08-06 20:43:23,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:23,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953040414] [2021-08-06 20:43:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:23,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:23,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:23,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953040414] [2021-08-06 20:43:23,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953040414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:23,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993067675] [2021-08-06 20:43:23,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:43:23,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:23,660 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:23,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:43:24,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:43:24,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:43:24,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:24,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:24,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:43:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:24,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993067675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:24,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:24,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:43:24,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629752710] [2021-08-06 20:43:24,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:43:24,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:43:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:43:24,469 INFO L87 Difference]: Start difference. First operand 482 states and 1052 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:24,614 INFO L93 Difference]: Finished difference Result 507 states and 1102 transitions. [2021-08-06 20:43:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:43:24,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 27 [2021-08-06 20:43:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:24,616 INFO L225 Difference]: With dead ends: 507 [2021-08-06 20:43:24,616 INFO L226 Difference]: Without dead ends: 507 [2021-08-06 20:43:24,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:43:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-06 20:43:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 473. [2021-08-06 20:43:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.190677966101695) internal successors, (1034), 472 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1034 transitions. [2021-08-06 20:43:24,625 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1034 transitions. Word has length 27 [2021-08-06 20:43:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:24,625 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1034 transitions. [2021-08-06 20:43:24,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-08-06 20:43:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1034 transitions. [2021-08-06 20:43:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:43:24,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:24,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:24,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:24,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:24,852 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:24,852 INFO L82 PathProgramCache]: Analyzing trace with hash -32771056, now seen corresponding path program 10 times [2021-08-06 20:43:24,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:24,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877007487] [2021-08-06 20:43:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:24,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:24,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 66.3 percent of original size [2021-08-06 20:43:24,944 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 66.3 percent of original size [2021-08-06 20:43:24,995 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 66.7 percent of original size [2021-08-06 20:43:25,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 66.7 percent of original size [2021-08-06 20:43:25,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 67.0 percent of original size [2021-08-06 20:43:25,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 67.0 percent of original size [2021-08-06 20:43:25,099 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 67.3 percent of original size [2021-08-06 20:43:25,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 67.3 percent of original size [2021-08-06 20:43:25,181 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 82.6 percent of original size [2021-08-06 20:43:25,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 82.6 percent of original size [2021-08-06 20:43:25,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 80.3 percent of original size [2021-08-06 20:43:25,308 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 80.3 percent of original size [2021-08-06 20:43:25,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 79.3 percent of original size [2021-08-06 20:43:25,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 79.3 percent of original size [2021-08-06 20:43:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:25,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:25,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877007487] [2021-08-06 20:43:25,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877007487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:25,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387000271] [2021-08-06 20:43:25,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:43:25,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:25,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:25,854 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:25,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:43:26,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:43:26,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:43:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:26,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:43:26,679 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:43:26,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.9 percent of original size [2021-08-06 20:43:26,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.9 percent of original size [2021-08-06 20:43:27,336 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 20:43:27,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 102 [2021-08-06 20:43:28,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:43:28,135 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:43:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:28,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387000271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:28,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:28,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-06 20:43:28,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738998334] [2021-08-06 20:43:28,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:43:28,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:43:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:43:28,154 INFO L87 Difference]: Start difference. First operand 473 states and 1034 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:32,724 INFO L93 Difference]: Finished difference Result 820 states and 1702 transitions. [2021-08-06 20:43:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 20:43:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:43:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:32,727 INFO L225 Difference]: With dead ends: 820 [2021-08-06 20:43:32,727 INFO L226 Difference]: Without dead ends: 810 [2021-08-06 20:43:32,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 4541.6ms TimeCoverageRelationStatistics Valid=914, Invalid=4488, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:43:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-08-06 20:43:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 484. [2021-08-06 20:43:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.196687370600414) internal successors, (1061), 483 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1061 transitions. [2021-08-06 20:43:32,738 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1061 transitions. Word has length 29 [2021-08-06 20:43:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:32,738 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1061 transitions. [2021-08-06 20:43:32,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:32,738 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1061 transitions. [2021-08-06 20:43:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:43:32,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:32,739 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:32,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 20:43:32,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:32,964 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:32,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1524775788, now seen corresponding path program 11 times [2021-08-06 20:43:32,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:32,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952972711] [2021-08-06 20:43:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:32,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:33,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 69.0 percent of original size [2021-08-06 20:43:33,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 69.0 percent of original size [2021-08-06 20:43:33,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 69.8 percent of original size [2021-08-06 20:43:33,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 69.8 percent of original size [2021-08-06 20:43:33,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 70.5 percent of original size [2021-08-06 20:43:33,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 70.5 percent of original size [2021-08-06 20:43:33,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 71.1 percent of original size [2021-08-06 20:43:33,144 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 71.1 percent of original size [2021-08-06 20:43:33,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 83.3 percent of original size [2021-08-06 20:43:33,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 83.3 percent of original size [2021-08-06 20:43:33,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 68.5 percent of original size [2021-08-06 20:43:33,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 68.5 percent of original size [2021-08-06 20:43:33,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 80.7 percent of original size [2021-08-06 20:43:33,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 80.7 percent of original size [2021-08-06 20:43:33,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 82.8 percent of original size [2021-08-06 20:43:33,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 82.8 percent of original size [2021-08-06 20:43:33,507 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 90.8 percent of original size [2021-08-06 20:43:33,512 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 90.8 percent of original size [2021-08-06 20:43:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:33,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:33,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952972711] [2021-08-06 20:43:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952972711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:33,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363517956] [2021-08-06 20:43:33,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:43:33,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:33,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:33,667 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:33,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:43:34,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:43:34,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:34,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:43:34,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:34,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:43:34,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:43:34,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:43:34,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:43:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:35,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:35,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:35,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:43:35,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 102 [2021-08-06 20:43:36,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:43:36,598 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:43:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:36,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363517956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:36,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:36,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 20:43:36,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238149568] [2021-08-06 20:43:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:43:36,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:43:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:43:36,617 INFO L87 Difference]: Start difference. First operand 484 states and 1061 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:41,926 INFO L93 Difference]: Finished difference Result 822 states and 1667 transitions. [2021-08-06 20:43:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:43:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:43:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:41,929 INFO L225 Difference]: With dead ends: 822 [2021-08-06 20:43:41,929 INFO L226 Difference]: Without dead ends: 817 [2021-08-06 20:43:41,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 5278.9ms TimeCoverageRelationStatistics Valid=892, Invalid=5588, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 20:43:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-08-06 20:43:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 490. [2021-08-06 20:43:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.198364008179959) internal successors, (1075), 489 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1075 transitions. [2021-08-06 20:43:41,959 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1075 transitions. Word has length 29 [2021-08-06 20:43:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:41,960 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1075 transitions. [2021-08-06 20:43:41,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1075 transitions. [2021-08-06 20:43:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:43:41,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:41,961 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] [2021-08-06 20:43:41,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:42,188 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,SelfDestructingSolverStorable34 [2021-08-06 20:43:42,189 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -567956336, now seen corresponding path program 11 times [2021-08-06 20:43:42,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:42,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95210005] [2021-08-06 20:43:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:42,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:42,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 34.2 percent of original size [2021-08-06 20:43:42,241 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 34.2 percent of original size [2021-08-06 20:43:42,253 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 35.9 percent of original size [2021-08-06 20:43:42,255 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 35.9 percent of original size [2021-08-06 20:43:42,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 37.5 percent of original size [2021-08-06 20:43:42,274 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 37.5 percent of original size [2021-08-06 20:43:42,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 39.0 percent of original size [2021-08-06 20:43:42,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 39.0 percent of original size [2021-08-06 20:43:42,319 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 73.1 percent of original size [2021-08-06 20:43:42,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 73.1 percent of original size [2021-08-06 20:43:42,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 84.1 percent of original size [2021-08-06 20:43:42,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 84.1 percent of original size [2021-08-06 20:43:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:42,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:42,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95210005] [2021-08-06 20:43:42,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95210005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:42,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887469104] [2021-08-06 20:43:42,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:43:42,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:42,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:42,686 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:42,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:43:43,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:43:43,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:43,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:43:43,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:43,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:43:43,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:43:44,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:43:44,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:43:44,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.0 percent of original size [2021-08-06 20:43:44,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.0 percent of original size [2021-08-06 20:43:44,484 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:43:44,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 56 [2021-08-06 20:43:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887469104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:44,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:44,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:43:44,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416645747] [2021-08-06 20:43:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:43:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:44,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:43:44,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:43:44,778 INFO L87 Difference]: Start difference. First operand 490 states and 1075 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2021-08-06 20:43:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:46,692 INFO L93 Difference]: Finished difference Result 645 states and 1316 transitions. [2021-08-06 20:43:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:43:46,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 29 [2021-08-06 20:43:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:46,695 INFO L225 Difference]: With dead ends: 645 [2021-08-06 20:43:46,695 INFO L226 Difference]: Without dead ends: 640 [2021-08-06 20:43:46,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1950.2ms TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:43:46,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-08-06 20:43:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 494. [2021-08-06 20:43:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.204868154158215) internal successors, (1087), 493 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1087 transitions. [2021-08-06 20:43:46,703 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1087 transitions. Word has length 29 [2021-08-06 20:43:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:46,703 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1087 transitions. [2021-08-06 20:43:46,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2021-08-06 20:43:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1087 transitions. [2021-08-06 20:43:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:43:46,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:46,704 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:46,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 20:43:46,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 20:43:46,923 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:46,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1539613712, now seen corresponding path program 12 times [2021-08-06 20:43:46,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:46,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520824043] [2021-08-06 20:43:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:46,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:46,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 69.0 percent of original size [2021-08-06 20:43:46,983 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 69.0 percent of original size [2021-08-06 20:43:47,009 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 69.8 percent of original size [2021-08-06 20:43:47,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 69.8 percent of original size [2021-08-06 20:43:47,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 70.5 percent of original size [2021-08-06 20:43:47,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 70.5 percent of original size [2021-08-06 20:43:47,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 71.1 percent of original size [2021-08-06 20:43:47,096 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 71.1 percent of original size [2021-08-06 20:43:47,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 83.3 percent of original size [2021-08-06 20:43:47,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 83.3 percent of original size [2021-08-06 20:43:47,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 68.8 percent of original size [2021-08-06 20:43:47,200 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 68.8 percent of original size [2021-08-06 20:43:47,261 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 80.6 percent of original size [2021-08-06 20:43:47,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 80.6 percent of original size [2021-08-06 20:43:47,399 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 82.8 percent of original size [2021-08-06 20:43:47,403 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 82.8 percent of original size [2021-08-06 20:43:47,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 80.4 percent of original size [2021-08-06 20:43:47,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 80.4 percent of original size [2021-08-06 20:43:47,497 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 89.7 percent of original size [2021-08-06 20:43:47,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 89.7 percent of original size [2021-08-06 20:43:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:47,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:47,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520824043] [2021-08-06 20:43:47,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520824043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:47,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967635295] [2021-08-06 20:43:47,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:43:47,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:47,610 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:47,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:43:48,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:43:48,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:48,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:43:48,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:48,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:43:48,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:43:49,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:43:49,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:43:49,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:49,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:49,915 INFO L354 Elim1Store]: treesize reduction 96, result has 35.6 percent of original size [2021-08-06 20:43:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 94 treesize of output 106 [2021-08-06 20:43:50,627 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:43:50,630 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:43:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:50,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967635295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:50,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:50,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:43:50,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864361625] [2021-08-06 20:43:50,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:43:50,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:50,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:43:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:43:50,646 INFO L87 Difference]: Start difference. First operand 494 states and 1087 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:55,376 INFO L93 Difference]: Finished difference Result 768 states and 1579 transitions. [2021-08-06 20:43:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 20:43:55,377 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:43:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:55,380 INFO L225 Difference]: With dead ends: 768 [2021-08-06 20:43:55,380 INFO L226 Difference]: Without dead ends: 758 [2021-08-06 20:43:55,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 4867.4ms TimeCoverageRelationStatistics Valid=761, Invalid=4789, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:43:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-08-06 20:43:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 498. [2021-08-06 20:43:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.1971830985915495) internal successors, (1092), 497 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1092 transitions. [2021-08-06 20:43:55,391 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1092 transitions. Word has length 29 [2021-08-06 20:43:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:55,391 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1092 transitions. [2021-08-06 20:43:55,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1092 transitions. [2021-08-06 20:43:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:43:55,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:55,393 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] [2021-08-06 20:43:55,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:55,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:55,597 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash 624510096, now seen corresponding path program 12 times [2021-08-06 20:43:55,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:55,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461850233] [2021-08-06 20:43:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:55,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:55,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 72.1 percent of original size [2021-08-06 20:43:55,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 72.1 percent of original size [2021-08-06 20:43:55,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:43:55,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:43:55,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 73.0 percent of original size [2021-08-06 20:43:55,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 73.0 percent of original size [2021-08-06 20:43:55,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 73.4 percent of original size [2021-08-06 20:43:55,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 73.4 percent of original size [2021-08-06 20:43:55,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 90, result has 60.9 percent of original size [2021-08-06 20:43:55,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 90, result has 60.9 percent of original size [2021-08-06 20:43:55,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 93.1 percent of original size [2021-08-06 20:43:55,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 93.1 percent of original size [2021-08-06 20:43:55,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 93.2 percent of original size [2021-08-06 20:43:56,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 93.2 percent of original size [2021-08-06 20:43:56,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 58.8 percent of original size [2021-08-06 20:43:56,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 58.8 percent of original size [2021-08-06 20:43:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:56,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:56,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461850233] [2021-08-06 20:43:56,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461850233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:56,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056123393] [2021-08-06 20:43:56,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:43:56,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:56,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:56,253 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:56,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:43:57,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:43:57,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:57,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:43:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:57,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:43:57,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:43:57,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.8 percent of original size [2021-08-06 20:43:57,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.8 percent of original size [2021-08-06 20:43:57,900 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:43:57,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:43:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:57,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:43:57,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:43:57,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-08-06 20:43:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:58,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056123393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:58,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:58,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 20:43:58,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738370044] [2021-08-06 20:43:58,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:43:58,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:43:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:43:58,540 INFO L87 Difference]: Start difference. First operand 498 states and 1092 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:03,353 INFO L93 Difference]: Finished difference Result 1124 states and 2173 transitions. [2021-08-06 20:44:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:44:03,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 29 [2021-08-06 20:44:03,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:03,356 INFO L225 Difference]: With dead ends: 1124 [2021-08-06 20:44:03,356 INFO L226 Difference]: Without dead ends: 1112 [2021-08-06 20:44:03,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 4787.4ms TimeCoverageRelationStatistics Valid=744, Invalid=3812, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:44:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-08-06 20:44:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 513. [2021-08-06 20:44:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.205078125) internal successors, (1129), 512 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1129 transitions. [2021-08-06 20:44:03,365 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1129 transitions. Word has length 29 [2021-08-06 20:44:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:03,365 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1129 transitions. [2021-08-06 20:44:03,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1129 transitions. [2021-08-06 20:44:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:03,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:03,367 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:03,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 20:44:03,579 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,SelfDestructingSolverStorable37 [2021-08-06 20:44:03,579 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:03,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2052824172, now seen corresponding path program 13 times [2021-08-06 20:44:03,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:03,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045546790] [2021-08-06 20:44:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:03,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:03,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 45.2 percent of original size [2021-08-06 20:44:03,645 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 45.2 percent of original size [2021-08-06 20:44:03,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 45.7 percent of original size [2021-08-06 20:44:03,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 45.7 percent of original size [2021-08-06 20:44:03,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 46.2 percent of original size [2021-08-06 20:44:03,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 46.2 percent of original size [2021-08-06 20:44:03,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 46.7 percent of original size [2021-08-06 20:44:03,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 46.7 percent of original size [2021-08-06 20:44:03,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 82.6 percent of original size [2021-08-06 20:44:03,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 82.6 percent of original size [2021-08-06 20:44:03,919 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 80.3 percent of original size [2021-08-06 20:44:03,939 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 80.3 percent of original size [2021-08-06 20:44:04,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 79.3 percent of original size [2021-08-06 20:44:04,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 79.3 percent of original size [2021-08-06 20:44:04,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 85.6 percent of original size [2021-08-06 20:44:04,144 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 85.6 percent of original size [2021-08-06 20:44:04,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 84.6 percent of original size [2021-08-06 20:44:04,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 84.6 percent of original size [2021-08-06 20:44:04,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 80.0 percent of original size [2021-08-06 20:44:04,308 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 80.0 percent of original size [2021-08-06 20:44:04,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 89.5 percent of original size [2021-08-06 20:44:04,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 89.5 percent of original size [2021-08-06 20:44:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:04,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:04,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045546790] [2021-08-06 20:44:04,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045546790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:04,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812210515] [2021-08-06 20:44:04,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:04,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:04,498 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:04,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:44:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:05,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:44:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:05,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:44:05,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:44:06,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:44:06,156 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:44:06,606 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:44:06,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 63 [2021-08-06 20:44:06,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:44:06,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:44:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:06,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812210515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:06,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:06,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-08-06 20:44:06,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051781007] [2021-08-06 20:44:06,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:44:06,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:06,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:44:06,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:44:06,835 INFO L87 Difference]: Start difference. First operand 513 states and 1129 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:11,298 INFO L93 Difference]: Finished difference Result 708 states and 1488 transitions. [2021-08-06 20:44:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 20:44:11,299 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-08-06 20:44:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:11,301 INFO L225 Difference]: With dead ends: 708 [2021-08-06 20:44:11,301 INFO L226 Difference]: Without dead ends: 703 [2021-08-06 20:44:11,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 4479.3ms TimeCoverageRelationStatistics Valid=658, Invalid=3764, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:44:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-08-06 20:44:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 511. [2021-08-06 20:44:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.2019607843137257) internal successors, (1123), 510 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1123 transitions. [2021-08-06 20:44:11,311 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1123 transitions. Word has length 29 [2021-08-06 20:44:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:11,312 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1123 transitions. [2021-08-06 20:44:11,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1123 transitions. [2021-08-06 20:44:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:11,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:11,313 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] [2021-08-06 20:44:11,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 20:44:11,516 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,SelfDestructingSolverStorable38 [2021-08-06 20:44:11,517 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:11,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:11,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1418543020, now seen corresponding path program 13 times [2021-08-06 20:44:11,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:11,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018227706] [2021-08-06 20:44:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:11,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:11,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 71.0 percent of original size [2021-08-06 20:44:11,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 71.0 percent of original size [2021-08-06 20:44:11,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 71.4 percent of original size [2021-08-06 20:44:11,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 71.4 percent of original size [2021-08-06 20:44:11,663 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 71.9 percent of original size [2021-08-06 20:44:11,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 71.9 percent of original size [2021-08-06 20:44:11,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 72.3 percent of original size [2021-08-06 20:44:11,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 72.3 percent of original size [2021-08-06 20:44:11,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 118, result has 53.9 percent of original size [2021-08-06 20:44:11,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 118, result has 53.9 percent of original size [2021-08-06 20:44:11,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 76.3 percent of original size [2021-08-06 20:44:11,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 76.3 percent of original size [2021-08-06 20:44:11,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 76.7 percent of original size [2021-08-06 20:44:11,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 76.7 percent of original size [2021-08-06 20:44:12,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 62.7 percent of original size [2021-08-06 20:44:12,041 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 62.7 percent of original size [2021-08-06 20:44:12,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 60.3 percent of original size [2021-08-06 20:44:12,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 60.3 percent of original size [2021-08-06 20:44:12,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 43, result has 46.3 percent of original size [2021-08-06 20:44:12,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 43, result has 46.3 percent of original size [2021-08-06 20:44:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:12,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:12,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018227706] [2021-08-06 20:44:12,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018227706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:12,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043420463] [2021-08-06 20:44:12,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:44:12,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:12,225 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:12,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:44:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:13,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:44:13,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:13,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:13,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:14,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:44:14,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:44:14,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.1 percent of original size [2021-08-06 20:44:14,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.1 percent of original size [2021-08-06 20:44:14,297 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:44:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 56 [2021-08-06 20:44:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:14,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043420463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:14,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:14,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:44:14,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334186079] [2021-08-06 20:44:14,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:44:14,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:44:14,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:44:14,580 INFO L87 Difference]: Start difference. First operand 511 states and 1123 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2021-08-06 20:44:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:15,465 INFO L93 Difference]: Finished difference Result 646 states and 1320 transitions. [2021-08-06 20:44:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:44:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 29 [2021-08-06 20:44:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:15,468 INFO L225 Difference]: With dead ends: 646 [2021-08-06 20:44:15,468 INFO L226 Difference]: Without dead ends: 641 [2021-08-06 20:44:15,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1110.0ms TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:44:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-08-06 20:44:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 525. [2021-08-06 20:44:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.196564885496183) internal successors, (1151), 524 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1151 transitions. [2021-08-06 20:44:15,475 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1151 transitions. Word has length 29 [2021-08-06 20:44:15,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:15,475 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1151 transitions. [2021-08-06 20:44:15,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2021-08-06 20:44:15,476 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1151 transitions. [2021-08-06 20:44:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:15,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:15,477 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] [2021-08-06 20:44:15,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 20:44:15,687 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,SelfDestructingSolverStorable39 [2021-08-06 20:44:15,687 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:15,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1131140240, now seen corresponding path program 14 times [2021-08-06 20:44:15,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:15,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419934354] [2021-08-06 20:44:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:15,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:15,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 52.4 percent of original size [2021-08-06 20:44:15,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 52.4 percent of original size [2021-08-06 20:44:15,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 52.9 percent of original size [2021-08-06 20:44:15,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 52.9 percent of original size [2021-08-06 20:44:15,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 53.5 percent of original size [2021-08-06 20:44:15,863 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 53.5 percent of original size [2021-08-06 20:44:15,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 54.0 percent of original size [2021-08-06 20:44:15,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 54.0 percent of original size [2021-08-06 20:44:16,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 90, result has 59.8 percent of original size [2021-08-06 20:44:16,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 90, result has 59.8 percent of original size [2021-08-06 20:44:16,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 86.4 percent of original size [2021-08-06 20:44:16,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 86.4 percent of original size [2021-08-06 20:44:16,188 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 86.6 percent of original size [2021-08-06 20:44:16,196 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 86.6 percent of original size [2021-08-06 20:44:16,260 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 72.0 percent of original size [2021-08-06 20:44:16,267 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 72.0 percent of original size [2021-08-06 20:44:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:16,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:16,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419934354] [2021-08-06 20:44:16,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419934354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:16,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891887015] [2021-08-06 20:44:16,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:16,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:16,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:16,429 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) [2021-08-06 20:44:16,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:44:17,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:44:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:17,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:17,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:18,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:44:18,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.1 percent of original size [2021-08-06 20:44:18,481 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.0 percent of original size [2021-08-06 20:44:18,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.0 percent of original size [2021-08-06 20:44:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:18,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:18,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:44:18,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:18,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:18,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 70 [2021-08-06 20:44:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:19,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891887015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:19,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:19,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 20:44:19,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418708733] [2021-08-06 20:44:19,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:44:19,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:44:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:44:19,308 INFO L87 Difference]: Start difference. First operand 525 states and 1151 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:21,248 INFO L93 Difference]: Finished difference Result 710 states and 1438 transitions. [2021-08-06 20:44:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:44:21,248 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 29 [2021-08-06 20:44:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:21,250 INFO L225 Difference]: With dead ends: 710 [2021-08-06 20:44:21,250 INFO L226 Difference]: Without dead ends: 700 [2021-08-06 20:44:21,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2022.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:44:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-08-06 20:44:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 541. [2021-08-06 20:44:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.2055555555555557) internal successors, (1191), 540 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1191 transitions. [2021-08-06 20:44:21,259 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1191 transitions. Word has length 29 [2021-08-06 20:44:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:21,259 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1191 transitions. [2021-08-06 20:44:21,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1191 transitions. [2021-08-06 20:44:21,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:21,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:21,260 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:21,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 20:44:21,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:21,471 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 772887568, now seen corresponding path program 14 times [2021-08-06 20:44:21,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:21,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886902855] [2021-08-06 20:44:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:21,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:21,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 45.2 percent of original size [2021-08-06 20:44:21,534 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 45.2 percent of original size [2021-08-06 20:44:21,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 45.7 percent of original size [2021-08-06 20:44:21,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 45.7 percent of original size [2021-08-06 20:44:21,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 46.2 percent of original size [2021-08-06 20:44:21,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 46.2 percent of original size [2021-08-06 20:44:21,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 57, result has 46.7 percent of original size [2021-08-06 20:44:21,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 57, result has 46.7 percent of original size [2021-08-06 20:44:21,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 82.6 percent of original size [2021-08-06 20:44:21,712 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 82.6 percent of original size [2021-08-06 20:44:21,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 80.3 percent of original size [2021-08-06 20:44:21,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 80.3 percent of original size [2021-08-06 20:44:21,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 79.3 percent of original size [2021-08-06 20:44:21,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 79.3 percent of original size [2021-08-06 20:44:22,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 85.6 percent of original size [2021-08-06 20:44:22,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 85.6 percent of original size [2021-08-06 20:44:22,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 82.1 percent of original size [2021-08-06 20:44:22,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 82.1 percent of original size [2021-08-06 20:44:22,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 80.0 percent of original size [2021-08-06 20:44:22,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 80.0 percent of original size [2021-08-06 20:44:22,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 89.5 percent of original size [2021-08-06 20:44:22,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 89.5 percent of original size [2021-08-06 20:44:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:22,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:22,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886902855] [2021-08-06 20:44:22,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886902855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:22,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003201300] [2021-08-06 20:44:22,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:44:22,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:22,331 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:22,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:44:23,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:44:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:44:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:23,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:44:23,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:44:24,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.9 percent of original size [2021-08-06 20:44:24,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.9 percent of original size [2021-08-06 20:44:24,675 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:44:24,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 63 [2021-08-06 20:44:24,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:44:24,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:44:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:24,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003201300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:24,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:24,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-08-06 20:44:24,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052457342] [2021-08-06 20:44:24,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:44:24,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:24,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:44:24,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:44:24,876 INFO L87 Difference]: Start difference. First operand 541 states and 1191 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:27,878 INFO L93 Difference]: Finished difference Result 696 states and 1490 transitions. [2021-08-06 20:44:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:44:27,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-08-06 20:44:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:27,880 INFO L225 Difference]: With dead ends: 696 [2021-08-06 20:44:27,880 INFO L226 Difference]: Without dead ends: 691 [2021-08-06 20:44:27,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 3116.7ms TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:44:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-08-06 20:44:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 541. [2021-08-06 20:44:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.2055555555555557) internal successors, (1191), 540 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1191 transitions. [2021-08-06 20:44:27,889 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1191 transitions. Word has length 29 [2021-08-06 20:44:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:27,889 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1191 transitions. [2021-08-06 20:44:27,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1191 transitions. [2021-08-06 20:44:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:27,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:27,890 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] [2021-08-06 20:44:27,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 20:44:28,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:28,091 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1860030636, now seen corresponding path program 15 times [2021-08-06 20:44:28,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:28,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877829657] [2021-08-06 20:44:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:28,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:28,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 72.1 percent of original size [2021-08-06 20:44:28,157 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 72.1 percent of original size [2021-08-06 20:44:28,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:44:28,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:44:28,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 73.0 percent of original size [2021-08-06 20:44:28,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 73.0 percent of original size [2021-08-06 20:44:28,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 73.4 percent of original size [2021-08-06 20:44:28,291 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 73.4 percent of original size [2021-08-06 20:44:28,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 90, result has 60.9 percent of original size [2021-08-06 20:44:28,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 90, result has 60.9 percent of original size [2021-08-06 20:44:28,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 93.1 percent of original size [2021-08-06 20:44:28,442 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 93.1 percent of original size [2021-08-06 20:44:28,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 71.0 percent of original size [2021-08-06 20:44:28,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 71.0 percent of original size [2021-08-06 20:44:28,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 71.6 percent of original size [2021-08-06 20:44:28,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 71.6 percent of original size [2021-08-06 20:44:28,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 58.8 percent of original size [2021-08-06 20:44:28,622 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 58.8 percent of original size [2021-08-06 20:44:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:28,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:28,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877829657] [2021-08-06 20:44:28,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877829657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:28,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125776078] [2021-08-06 20:44:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:28,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:28,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:28,731 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:28,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:44:30,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:44:30,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:44:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:30,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:30,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:30,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.7 percent of original size [2021-08-06 20:44:30,827 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.7 percent of original size [2021-08-06 20:44:30,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.5 percent of original size [2021-08-06 20:44:30,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.5 percent of original size [2021-08-06 20:44:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:31,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:31,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-08-06 20:44:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:31,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125776078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:31,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:31,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-08-06 20:44:31,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433019121] [2021-08-06 20:44:31,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:44:31,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:44:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:44:31,994 INFO L87 Difference]: Start difference. First operand 541 states and 1191 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:36,896 INFO L93 Difference]: Finished difference Result 1065 states and 2109 transitions. [2021-08-06 20:44:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 20:44:36,897 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 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 29 [2021-08-06 20:44:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:36,900 INFO L225 Difference]: With dead ends: 1065 [2021-08-06 20:44:36,900 INFO L226 Difference]: Without dead ends: 1053 [2021-08-06 20:44:36,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 4981.7ms TimeCoverageRelationStatistics Valid=812, Invalid=4590, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:44:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-08-06 20:44:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 547. [2021-08-06 20:44:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 2.197802197802198) internal successors, (1200), 546 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1200 transitions. [2021-08-06 20:44:36,909 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1200 transitions. Word has length 29 [2021-08-06 20:44:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:36,910 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 1200 transitions. [2021-08-06 20:44:36,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1200 transitions. [2021-08-06 20:44:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:36,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:36,911 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] [2021-08-06 20:44:36,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:37,116 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,SelfDestructingSolverStorable42 [2021-08-06 20:44:37,117 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:37,117 INFO L82 PathProgramCache]: Analyzing trace with hash 470352, now seen corresponding path program 16 times [2021-08-06 20:44:37,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:37,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576092513] [2021-08-06 20:44:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:37,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:37,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 63.6 percent of original size [2021-08-06 20:44:37,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 63.6 percent of original size [2021-08-06 20:44:37,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:44:37,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:44:37,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.7 percent of original size [2021-08-06 20:44:37,291 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.7 percent of original size [2021-08-06 20:44:37,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 65.2 percent of original size [2021-08-06 20:44:37,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 65.2 percent of original size [2021-08-06 20:44:37,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 120, result has 57.0 percent of original size [2021-08-06 20:44:37,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 120, result has 57.0 percent of original size [2021-08-06 20:44:37,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 50.5 percent of original size [2021-08-06 20:44:37,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 50.5 percent of original size [2021-08-06 20:44:37,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 108, result has 29.9 percent of original size [2021-08-06 20:44:37,706 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 108, result has 29.9 percent of original size [2021-08-06 20:44:37,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 84.4 percent of original size [2021-08-06 20:44:37,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 84.4 percent of original size [2021-08-06 20:44:37,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.4 percent of original size [2021-08-06 20:44:37,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.4 percent of original size [2021-08-06 20:44:37,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 66.7 percent of original size [2021-08-06 20:44:37,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 66.7 percent of original size [2021-08-06 20:44:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:37,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:37,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576092513] [2021-08-06 20:44:37,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576092513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:37,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254036574] [2021-08-06 20:44:37,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:37,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:37,900 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:37,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:44:39,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:44:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:39,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:39,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:39,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.8 percent of original size [2021-08-06 20:44:39,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.8 percent of original size [2021-08-06 20:44:40,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:44:40,164 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:44:40,241 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 20:44:40,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 78 [2021-08-06 20:44:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:40,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254036574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:40,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:40,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:44:40,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501525053] [2021-08-06 20:44:40,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:44:40,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:44:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:44:40,743 INFO L87 Difference]: Start difference. First operand 547 states and 1200 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:44,173 INFO L93 Difference]: Finished difference Result 1005 states and 2020 transitions. [2021-08-06 20:44:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:44:44,174 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 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 29 [2021-08-06 20:44:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:44,177 INFO L225 Difference]: With dead ends: 1005 [2021-08-06 20:44:44,177 INFO L226 Difference]: Without dead ends: 991 [2021-08-06 20:44:44,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 3552.9ms TimeCoverageRelationStatistics Valid=707, Invalid=3325, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:44:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-08-06 20:44:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 566. [2021-08-06 20:44:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.1982300884955754) internal successors, (1242), 565 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1242 transitions. [2021-08-06 20:44:44,185 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1242 transitions. Word has length 29 [2021-08-06 20:44:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:44,186 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 1242 transitions. [2021-08-06 20:44:44,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1242 transitions. [2021-08-06 20:44:44,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:44,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:44,186 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] [2021-08-06 20:44:44,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:44,387 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,SelfDestructingSolverStorable43 [2021-08-06 20:44:44,387 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:44,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1491534380, now seen corresponding path program 17 times [2021-08-06 20:44:44,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:44,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428244135] [2021-08-06 20:44:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:44,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:44,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 63.6 percent of original size [2021-08-06 20:44:44,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 63.6 percent of original size [2021-08-06 20:44:44,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:44:44,496 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:44:44,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.7 percent of original size [2021-08-06 20:44:44,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.7 percent of original size [2021-08-06 20:44:44,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 65.2 percent of original size [2021-08-06 20:44:44,630 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 65.2 percent of original size [2021-08-06 20:44:44,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 120, result has 57.0 percent of original size [2021-08-06 20:44:44,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 120, result has 57.0 percent of original size [2021-08-06 20:44:44,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 50.5 percent of original size [2021-08-06 20:44:44,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 50.5 percent of original size [2021-08-06 20:44:45,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 108, result has 29.9 percent of original size [2021-08-06 20:44:45,020 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 108, result has 29.9 percent of original size [2021-08-06 20:44:45,056 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 84.4 percent of original size [2021-08-06 20:44:45,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 84.4 percent of original size [2021-08-06 20:44:45,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.4 percent of original size [2021-08-06 20:44:45,102 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.4 percent of original size [2021-08-06 20:44:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:45,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:45,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428244135] [2021-08-06 20:44:45,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428244135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:45,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844384977] [2021-08-06 20:44:45,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:44:45,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:45,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:45,233 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:45,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:44:46,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:44:46,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:44:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:47,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:47,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:44:47,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.5 percent of original size [2021-08-06 20:44:47,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.5 percent of original size [2021-08-06 20:44:47,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.8 percent of original size [2021-08-06 20:44:47,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.8 percent of original size [2021-08-06 20:44:47,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:47,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:47,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:47,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:44:47,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:44:47,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 70 [2021-08-06 20:44:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:48,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844384977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:48,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:48,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 20:44:48,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448449842] [2021-08-06 20:44:48,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:44:48,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:44:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:44:48,402 INFO L87 Difference]: Start difference. First operand 566 states and 1242 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:49,584 INFO L93 Difference]: Finished difference Result 733 states and 1496 transitions. [2021-08-06 20:44:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:44:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 29 [2021-08-06 20:44:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:49,587 INFO L225 Difference]: With dead ends: 733 [2021-08-06 20:44:49,587 INFO L226 Difference]: Without dead ends: 723 [2021-08-06 20:44:49,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1419.7ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:44:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-08-06 20:44:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 572. [2021-08-06 20:44:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.1961471103327495) internal successors, (1254), 571 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1254 transitions. [2021-08-06 20:44:49,598 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1254 transitions. Word has length 29 [2021-08-06 20:44:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:49,598 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1254 transitions. [2021-08-06 20:44:49,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1254 transitions. [2021-08-06 20:44:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:49,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:49,599 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:49,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 20:44:49,804 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,SelfDestructingSolverStorable44 [2021-08-06 20:44:49,805 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:49,805 INFO L82 PathProgramCache]: Analyzing trace with hash -534714928, now seen corresponding path program 9 times [2021-08-06 20:44:49,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:49,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028768504] [2021-08-06 20:44:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:49,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:49,875 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.7 percent of original size [2021-08-06 20:44:49,877 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.7 percent of original size [2021-08-06 20:44:49,909 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 62.5 percent of original size [2021-08-06 20:44:49,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 62.5 percent of original size [2021-08-06 20:44:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:50,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:50,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028768504] [2021-08-06 20:44:50,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028768504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:50,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132516953] [2021-08-06 20:44:50,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:50,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:50,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:50,031 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:50,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:44:51,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:44:51,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:44:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:52,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:44:52,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:44:52,205 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:44:52,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:44:52,914 INFO L354 Elim1Store]: treesize reduction 22, result has 66.2 percent of original size [2021-08-06 20:44:52,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 98 [2021-08-06 20:44:53,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:44:53,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:44:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:54,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132516953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:54,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:54,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 25 [2021-08-06 20:44:54,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64002485] [2021-08-06 20:44:54,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:44:54,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:54,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:44:54,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:44:54,010 INFO L87 Difference]: Start difference. First operand 572 states and 1254 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:54,917 INFO L93 Difference]: Finished difference Result 690 states and 1424 transitions. [2021-08-06 20:44:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:44:54,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:44:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:54,920 INFO L225 Difference]: With dead ends: 690 [2021-08-06 20:44:54,920 INFO L226 Difference]: Without dead ends: 659 [2021-08-06 20:44:54,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1111.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:44:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-08-06 20:44:54,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 576. [2021-08-06 20:44:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.1930434782608694) internal successors, (1261), 575 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1261 transitions. [2021-08-06 20:44:54,929 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1261 transitions. Word has length 29 [2021-08-06 20:44:54,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:54,930 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1261 transitions. [2021-08-06 20:44:54,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1261 transitions. [2021-08-06 20:44:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:54,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:54,930 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:54,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 20:44:55,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 20:44:55,131 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:55,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1644185968, now seen corresponding path program 10 times [2021-08-06 20:44:55,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:55,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762818367] [2021-08-06 20:44:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:55,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:55,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.7 percent of original size [2021-08-06 20:44:55,197 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.7 percent of original size [2021-08-06 20:44:55,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 70.2 percent of original size [2021-08-06 20:44:55,231 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 70.2 percent of original size [2021-08-06 20:44:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:55,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:55,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762818367] [2021-08-06 20:44:55,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762818367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:55,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397905193] [2021-08-06 20:44:55,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:44:55,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:55,345 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:55,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:44:57,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:44:57,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:44:57,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 20:44:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:44:57,370 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:44:57,384 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:44:57,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.2 percent of original size [2021-08-06 20:44:57,496 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.2 percent of original size [2021-08-06 20:44:57,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 48 [2021-08-06 20:44:58,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:44:58,020 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:44:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:58,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397905193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:58,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:44:58,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 20:44:58,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009350879] [2021-08-06 20:44:58,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:44:58,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:44:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:44:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:58,036 INFO L87 Difference]: Start difference. First operand 576 states and 1261 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:44:58,181 INFO L93 Difference]: Finished difference Result 649 states and 1371 transitions. [2021-08-06 20:44:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:44:58,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:44:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:44:58,184 INFO L225 Difference]: With dead ends: 649 [2021-08-06 20:44:58,184 INFO L226 Difference]: Without dead ends: 644 [2021-08-06 20:44:58,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:44:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-08-06 20:44:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 586. [2021-08-06 20:44:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1965811965811968) internal successors, (1285), 585 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1285 transitions. [2021-08-06 20:44:58,192 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1285 transitions. Word has length 29 [2021-08-06 20:44:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:44:58,193 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1285 transitions. [2021-08-06 20:44:58,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:44:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1285 transitions. [2021-08-06 20:44:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:44:58,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:44:58,194 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:44:58,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 20:44:58,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:58,405 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:44:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:44:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash 320125964, now seen corresponding path program 15 times [2021-08-06 20:44:58,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:44:58,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176304654] [2021-08-06 20:44:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:44:58,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:44:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:44:58,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 20:44:58,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 20:44:58,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 56.1 percent of original size [2021-08-06 20:44:58,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 56.1 percent of original size [2021-08-06 20:44:58,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 57.6 percent of original size [2021-08-06 20:44:58,494 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 57.6 percent of original size [2021-08-06 20:44:58,522 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:44:58,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:44:58,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 87.3 percent of original size [2021-08-06 20:44:58,565 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 87.3 percent of original size [2021-08-06 20:44:58,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 66.2 percent of original size [2021-08-06 20:44:58,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 66.2 percent of original size [2021-08-06 20:44:58,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 56.6 percent of original size [2021-08-06 20:44:58,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 56.6 percent of original size [2021-08-06 20:44:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:44:58,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:44:58,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176304654] [2021-08-06 20:44:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176304654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:44:58,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874730497] [2021-08-06 20:44:58,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:44:58,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:44:58,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:44:58,936 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:44:58,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:45:00,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:45:00,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:00,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:45:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:01,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:45:01,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:45:01,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.8 percent of original size [2021-08-06 20:45:01,197 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.8 percent of original size [2021-08-06 20:45:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:01,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:02,049 INFO L354 Elim1Store]: treesize reduction 22, result has 85.2 percent of original size [2021-08-06 20:45:02,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 102 treesize of output 188 [2021-08-06 20:45:18,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 89.9 percent of original size [2021-08-06 20:45:18,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 89.9 percent of original size [2021-08-06 20:45:18,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:45:18,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:45:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874730497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:18,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:18,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 20:45:18,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496385462] [2021-08-06 20:45:18,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:45:18,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:18,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:45:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:45:18,966 INFO L87 Difference]: Start difference. First operand 586 states and 1285 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:22,954 INFO L93 Difference]: Finished difference Result 816 states and 1772 transitions. [2021-08-06 20:45:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:45:22,954 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:45:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:22,956 INFO L225 Difference]: With dead ends: 816 [2021-08-06 20:45:22,956 INFO L226 Difference]: Without dead ends: 804 [2021-08-06 20:45:22,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 4077.5ms TimeCoverageRelationStatistics Valid=751, Invalid=3805, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:45:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-08-06 20:45:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 608. [2021-08-06 20:45:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 2.2108731466227347) internal successors, (1342), 607 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1342 transitions. [2021-08-06 20:45:22,967 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1342 transitions. Word has length 29 [2021-08-06 20:45:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:22,967 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1342 transitions. [2021-08-06 20:45:22,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1342 transitions. [2021-08-06 20:45:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:45:22,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:22,968 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:22,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 20:45:23,184 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,SelfDestructingSolverStorable47 [2021-08-06 20:45:23,185 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:23,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:23,185 INFO L82 PathProgramCache]: Analyzing trace with hash -778299440, now seen corresponding path program 16 times [2021-08-06 20:45:23,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:23,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893795781] [2021-08-06 20:45:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:23,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:23,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 20:45:23,234 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 20:45:23,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 56.1 percent of original size [2021-08-06 20:45:23,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 56.1 percent of original size [2021-08-06 20:45:23,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 57.6 percent of original size [2021-08-06 20:45:23,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 57.6 percent of original size [2021-08-06 20:45:23,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:45:23,310 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:45:23,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 87.1 percent of original size [2021-08-06 20:45:23,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 87.1 percent of original size [2021-08-06 20:45:23,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 62.3 percent of original size [2021-08-06 20:45:23,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 62.3 percent of original size [2021-08-06 20:45:23,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 50, result has 58.3 percent of original size [2021-08-06 20:45:23,449 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 50, result has 58.3 percent of original size [2021-08-06 20:45:23,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 64.2 percent of original size [2021-08-06 20:45:23,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 64.2 percent of original size [2021-08-06 20:45:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:23,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:23,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893795781] [2021-08-06 20:45:23,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893795781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:23,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713656304] [2021-08-06 20:45:23,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:45:23,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:23,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:23,728 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:23,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:45:25,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:45:25,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:45:25,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:25,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.3 percent of original size [2021-08-06 20:45:25,887 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.3 percent of original size [2021-08-06 20:45:26,000 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.2 percent of original size [2021-08-06 20:45:26,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.2 percent of original size [2021-08-06 20:45:26,503 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 20:45:26,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 106 [2021-08-06 20:45:27,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:45:27,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:45:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:27,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713656304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:27,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:27,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-08-06 20:45:27,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28141964] [2021-08-06 20:45:27,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:45:27,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:45:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:45:27,720 INFO L87 Difference]: Start difference. First operand 608 states and 1342 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:32,618 INFO L93 Difference]: Finished difference Result 910 states and 1985 transitions. [2021-08-06 20:45:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:45:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 29 [2021-08-06 20:45:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:32,621 INFO L225 Difference]: With dead ends: 910 [2021-08-06 20:45:32,621 INFO L226 Difference]: Without dead ends: 896 [2021-08-06 20:45:32,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2880.0ms TimeCoverageRelationStatistics Valid=734, Invalid=3298, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:45:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-08-06 20:45:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 652. [2021-08-06 20:45:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.2012288786482337) internal successors, (1433), 651 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1433 transitions. [2021-08-06 20:45:32,634 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1433 transitions. Word has length 29 [2021-08-06 20:45:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:32,634 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1433 transitions. [2021-08-06 20:45:32,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1433 transitions. [2021-08-06 20:45:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:45:32,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:32,636 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:32,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 20:45:32,859 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,SelfDestructingSolverStorable48 [2021-08-06 20:45:32,860 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:32,860 INFO L82 PathProgramCache]: Analyzing trace with hash -420447220, now seen corresponding path program 17 times [2021-08-06 20:45:32,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:32,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885531269] [2021-08-06 20:45:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:32,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:32,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 20:45:32,911 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 20:45:32,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 56.1 percent of original size [2021-08-06 20:45:32,931 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 56.1 percent of original size [2021-08-06 20:45:32,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 57.6 percent of original size [2021-08-06 20:45:32,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 57.6 percent of original size [2021-08-06 20:45:32,988 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:45:32,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:45:33,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 87.5 percent of original size [2021-08-06 20:45:33,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 87.5 percent of original size [2021-08-06 20:45:33,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 64.9 percent of original size [2021-08-06 20:45:33,076 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 64.9 percent of original size [2021-08-06 20:45:33,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 60.0 percent of original size [2021-08-06 20:45:33,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 60.0 percent of original size [2021-08-06 20:45:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:33,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:33,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885531269] [2021-08-06 20:45:33,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885531269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:33,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608903834] [2021-08-06 20:45:33,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:45:33,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:33,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:33,391 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:33,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:45:35,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:45:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:45:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:35,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.3 percent of original size [2021-08-06 20:45:35,600 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.3 percent of original size [2021-08-06 20:45:35,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.2 percent of original size [2021-08-06 20:45:35,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.2 percent of original size [2021-08-06 20:45:36,195 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 20:45:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 96 treesize of output 104 [2021-08-06 20:45:37,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:45:37,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:45:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:37,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608903834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:37,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:37,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-08-06 20:45:37,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167164901] [2021-08-06 20:45:37,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:45:37,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:45:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:45:37,504 INFO L87 Difference]: Start difference. First operand 652 states and 1433 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:40,314 INFO L93 Difference]: Finished difference Result 1112 states and 2303 transitions. [2021-08-06 20:45:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:45:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 29 [2021-08-06 20:45:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:40,317 INFO L225 Difference]: With dead ends: 1112 [2021-08-06 20:45:40,317 INFO L226 Difference]: Without dead ends: 1096 [2021-08-06 20:45:40,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 2855.1ms TimeCoverageRelationStatistics Valid=757, Invalid=3149, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:45:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-08-06 20:45:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 683. [2021-08-06 20:45:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 2.2126099706744866) internal successors, (1509), 682 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1509 transitions. [2021-08-06 20:45:40,327 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1509 transitions. Word has length 29 [2021-08-06 20:45:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:40,327 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 1509 transitions. [2021-08-06 20:45:40,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1509 transitions. [2021-08-06 20:45:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:45:40,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:40,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:45:40,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 20:45:40,528 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,SelfDestructingSolverStorable49 [2021-08-06 20:45:40,529 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1912451952, now seen corresponding path program 18 times [2021-08-06 20:45:40,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:40,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550866674] [2021-08-06 20:45:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:40,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:40,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 20:45:40,577 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 51.0 percent of original size [2021-08-06 20:45:40,593 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 56.1 percent of original size [2021-08-06 20:45:40,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 56.1 percent of original size [2021-08-06 20:45:40,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 57.6 percent of original size [2021-08-06 20:45:40,621 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 57.6 percent of original size [2021-08-06 20:45:40,647 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:45:40,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:45:40,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 87.5 percent of original size [2021-08-06 20:45:40,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 87.5 percent of original size [2021-08-06 20:45:40,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 64.5 percent of original size [2021-08-06 20:45:40,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 64.5 percent of original size [2021-08-06 20:45:40,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 59.7 percent of original size [2021-08-06 20:45:40,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 59.7 percent of original size [2021-08-06 20:45:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:41,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:41,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550866674] [2021-08-06 20:45:41,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550866674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:41,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257850259] [2021-08-06 20:45:41,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:41,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:41,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:41,028 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:41,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:45:43,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:45:43,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:45:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:43,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:45:43,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:45:43,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:45:43,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:45:44,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:44,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:44,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:44,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 102 [2021-08-06 20:45:45,169 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:45:45,172 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:45:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:45,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257850259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:45,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:45,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-08-06 20:45:45,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532518142] [2021-08-06 20:45:45,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:45:45,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:45,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:45:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:45:45,188 INFO L87 Difference]: Start difference. First operand 683 states and 1509 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:47,022 INFO L93 Difference]: Finished difference Result 955 states and 1995 transitions. [2021-08-06 20:45:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:45:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:45:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:47,026 INFO L225 Difference]: With dead ends: 955 [2021-08-06 20:45:47,026 INFO L226 Difference]: Without dead ends: 945 [2021-08-06 20:45:47,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1954.2ms TimeCoverageRelationStatistics Valid=485, Invalid=2485, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:45:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-08-06 20:45:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 684. [2021-08-06 20:45:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.2152269399707176) internal successors, (1513), 683 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1513 transitions. [2021-08-06 20:45:47,037 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1513 transitions. Word has length 29 [2021-08-06 20:45:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:47,037 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1513 transitions. [2021-08-06 20:45:47,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1513 transitions. [2021-08-06 20:45:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:45:47,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:47,038 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] [2021-08-06 20:45:47,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 20:45:47,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:47,239 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:47,239 INFO L82 PathProgramCache]: Analyzing trace with hash -955632500, now seen corresponding path program 18 times [2021-08-06 20:45:47,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:47,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975144218] [2021-08-06 20:45:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:47,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:47,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 43, result has 30.6 percent of original size [2021-08-06 20:45:47,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 43, result has 30.6 percent of original size [2021-08-06 20:45:47,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 43, result has 31.7 percent of original size [2021-08-06 20:45:47,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 43, result has 31.7 percent of original size [2021-08-06 20:45:47,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 43, result has 32.8 percent of original size [2021-08-06 20:45:47,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 43, result has 32.8 percent of original size [2021-08-06 20:45:47,354 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 44.6 percent of original size [2021-08-06 20:45:47,358 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 44.6 percent of original size [2021-08-06 20:45:47,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 90, result has 56.3 percent of original size [2021-08-06 20:45:47,413 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 90, result has 56.3 percent of original size [2021-08-06 20:45:47,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 60.8 percent of original size [2021-08-06 20:45:47,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 60.8 percent of original size [2021-08-06 20:45:47,593 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 86.1 percent of original size [2021-08-06 20:45:47,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 86.1 percent of original size [2021-08-06 20:45:47,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 85.5 percent of original size [2021-08-06 20:45:47,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 85.5 percent of original size [2021-08-06 20:45:47,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 84.0 percent of original size [2021-08-06 20:45:47,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 84.0 percent of original size [2021-08-06 20:45:47,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 68.5 percent of original size [2021-08-06 20:45:47,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 68.5 percent of original size [2021-08-06 20:45:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:47,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:47,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975144218] [2021-08-06 20:45:47,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975144218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:47,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939668487] [2021-08-06 20:45:47,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:45:47,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:47,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:47,868 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:47,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:45:50,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:45:50,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:45:50,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:45:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:50,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:45:50,308 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:45:50,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.3 percent of original size [2021-08-06 20:45:50,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.3 percent of original size [2021-08-06 20:45:50,959 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:45:50,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:45:51,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:45:51,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:45:51,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 98 [2021-08-06 20:45:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:52,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939668487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:52,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:52,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:45:52,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617307707] [2021-08-06 20:45:52,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:45:52,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:45:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:45:52,295 INFO L87 Difference]: Start difference. First operand 684 states and 1513 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:45:54,871 INFO L93 Difference]: Finished difference Result 1008 states and 2119 transitions. [2021-08-06 20:45:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:45:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 29 [2021-08-06 20:45:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:45:54,873 INFO L225 Difference]: With dead ends: 1008 [2021-08-06 20:45:54,873 INFO L226 Difference]: Without dead ends: 998 [2021-08-06 20:45:54,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2592.8ms TimeCoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:45:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-08-06 20:45:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 688. [2021-08-06 20:45:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 2.2212518195050945) internal successors, (1526), 687 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1526 transitions. [2021-08-06 20:45:54,885 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1526 transitions. Word has length 29 [2021-08-06 20:45:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:45:54,885 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 1526 transitions. [2021-08-06 20:45:54,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:45:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1526 transitions. [2021-08-06 20:45:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:45:54,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:45:54,886 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] [2021-08-06 20:45:54,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 20:45:55,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:55,087 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:45:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:45:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1877420208, now seen corresponding path program 19 times [2021-08-06 20:45:55,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:45:55,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157068395] [2021-08-06 20:45:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:45:55,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:45:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:55,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 18.1 percent of original size [2021-08-06 20:45:55,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 18.1 percent of original size [2021-08-06 20:45:55,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 53, result has 27.4 percent of original size [2021-08-06 20:45:55,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 53, result has 27.4 percent of original size [2021-08-06 20:45:55,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 52, result has 29.7 percent of original size [2021-08-06 20:45:55,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 52, result has 29.7 percent of original size [2021-08-06 20:45:55,202 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 40.0 percent of original size [2021-08-06 20:45:55,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 40.0 percent of original size [2021-08-06 20:45:55,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 60.8 percent of original size [2021-08-06 20:45:55,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 60.8 percent of original size [2021-08-06 20:45:55,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 93, result has 64.6 percent of original size [2021-08-06 20:45:55,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 93, result has 64.6 percent of original size [2021-08-06 20:45:55,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 85.1 percent of original size [2021-08-06 20:45:55,627 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 85.1 percent of original size [2021-08-06 20:45:55,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 80.0 percent of original size [2021-08-06 20:45:55,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 80.0 percent of original size [2021-08-06 20:45:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:56,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:45:56,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157068395] [2021-08-06 20:45:56,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157068395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:56,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030807179] [2021-08-06 20:45:56,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:45:56,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:45:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:45:56,013 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:45:56,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:45:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:45:58,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:45:58,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:45:58,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:45:58,634 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:45:58,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:45:58,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:45:59,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.8 percent of original size [2021-08-06 20:45:59,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.8 percent of original size [2021-08-06 20:45:59,298 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 20:45:59,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 97 treesize of output 85 [2021-08-06 20:45:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:45:59,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030807179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:45:59,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:45:59,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:45:59,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109579772] [2021-08-06 20:45:59,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:45:59,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:45:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:45:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:45:59,862 INFO L87 Difference]: Start difference. First operand 688 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:04,660 INFO L93 Difference]: Finished difference Result 1055 states and 2190 transitions. [2021-08-06 20:46:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:46:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 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 29 [2021-08-06 20:46:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:04,662 INFO L225 Difference]: With dead ends: 1055 [2021-08-06 20:46:04,662 INFO L226 Difference]: Without dead ends: 1045 [2021-08-06 20:46:04,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 5004.1ms TimeCoverageRelationStatistics Valid=570, Invalid=3212, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:46:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-08-06 20:46:04,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 703. [2021-08-06 20:46:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.2279202279202277) internal successors, (1564), 702 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1564 transitions. [2021-08-06 20:46:04,674 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1564 transitions. Word has length 29 [2021-08-06 20:46:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:04,674 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1564 transitions. [2021-08-06 20:46:04,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1564 transitions. [2021-08-06 20:46:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:46:04,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:04,675 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] [2021-08-06 20:46:04,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 20:46:04,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:04,889 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:04,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1211975504, now seen corresponding path program 20 times [2021-08-06 20:46:04,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:04,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81268898] [2021-08-06 20:46:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:04,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:04,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 89.6 percent of original size [2021-08-06 20:46:04,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 89.6 percent of original size [2021-08-06 20:46:04,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 89.8 percent of original size [2021-08-06 20:46:04,991 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 89.8 percent of original size [2021-08-06 20:46:05,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.0 percent of original size [2021-08-06 20:46:05,048 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.0 percent of original size [2021-08-06 20:46:05,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 90.2 percent of original size [2021-08-06 20:46:05,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 90.2 percent of original size [2021-08-06 20:46:05,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 70.4 percent of original size [2021-08-06 20:46:05,204 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 70.4 percent of original size [2021-08-06 20:46:05,298 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 72.7 percent of original size [2021-08-06 20:46:05,321 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 72.7 percent of original size [2021-08-06 20:46:05,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 94.3 percent of original size [2021-08-06 20:46:05,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 94.3 percent of original size [2021-08-06 20:46:05,497 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 91.5 percent of original size [2021-08-06 20:46:05,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 91.5 percent of original size [2021-08-06 20:46:05,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 63.5 percent of original size [2021-08-06 20:46:05,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 63.5 percent of original size [2021-08-06 20:46:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:05,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:05,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81268898] [2021-08-06 20:46:05,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81268898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:05,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824572003] [2021-08-06 20:46:05,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:46:05,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:05,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:05,677 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:05,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:46:08,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:46:08,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:46:08,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:08,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:08,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:08,482 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.8 percent of original size [2021-08-06 20:46:08,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.8 percent of original size [2021-08-06 20:46:08,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:46:08,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:46:08,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:08,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:08,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:08,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:08,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:46:08,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-08-06 20:46:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:09,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824572003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:09,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:09,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 20:46:09,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867234066] [2021-08-06 20:46:09,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:46:09,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:46:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:46:09,616 INFO L87 Difference]: Start difference. First operand 703 states and 1564 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:13,219 INFO L93 Difference]: Finished difference Result 1121 states and 2345 transitions. [2021-08-06 20:46:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 20:46:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 29 [2021-08-06 20:46:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:13,221 INFO L225 Difference]: With dead ends: 1121 [2021-08-06 20:46:13,221 INFO L226 Difference]: Without dead ends: 1111 [2021-08-06 20:46:13,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 3537.6ms TimeCoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:46:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-08-06 20:46:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 707. [2021-08-06 20:46:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.228045325779037) internal successors, (1573), 706 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1573 transitions. [2021-08-06 20:46:13,231 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1573 transitions. Word has length 29 [2021-08-06 20:46:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:13,231 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 1573 transitions. [2021-08-06 20:46:13,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1573 transitions. [2021-08-06 20:46:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:46:13,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:13,233 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] [2021-08-06 20:46:13,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:13,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-06 20:46:13,449 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash -613630000, now seen corresponding path program 21 times [2021-08-06 20:46:13,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:13,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173187859] [2021-08-06 20:46:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:13,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:13,497 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 17.3 percent of original size [2021-08-06 20:46:13,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 17.3 percent of original size [2021-08-06 20:46:13,512 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 56, result has 26.3 percent of original size [2021-08-06 20:46:13,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 56, result has 26.3 percent of original size [2021-08-06 20:46:13,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 37.7 percent of original size [2021-08-06 20:46:13,589 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 37.7 percent of original size [2021-08-06 20:46:13,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 39.7 percent of original size [2021-08-06 20:46:13,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 39.7 percent of original size [2021-08-06 20:46:13,672 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 60.8 percent of original size [2021-08-06 20:46:13,700 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 60.8 percent of original size [2021-08-06 20:46:13,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 103, result has 59.1 percent of original size [2021-08-06 20:46:13,846 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 103, result has 59.1 percent of original size [2021-08-06 20:46:13,957 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 62.7 percent of original size [2021-08-06 20:46:13,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 62.7 percent of original size [2021-08-06 20:46:14,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 80.0 percent of original size [2021-08-06 20:46:14,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 80.0 percent of original size [2021-08-06 20:46:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:14,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:14,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173187859] [2021-08-06 20:46:14,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173187859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:14,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937779918] [2021-08-06 20:46:14,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:46:14,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:14,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:14,393 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:14,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:46:17,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:46:17,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:17,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:46:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:17,257 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:17,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:17,513 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.1 percent of original size [2021-08-06 20:46:17,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.1 percent of original size [2021-08-06 20:46:17,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.7 percent of original size [2021-08-06 20:46:17,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.7 percent of original size [2021-08-06 20:46:17,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:17,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:17,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:17,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:17,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:46:17,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 79 [2021-08-06 20:46:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:18,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937779918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:18,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:18,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 20:46:18,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096880638] [2021-08-06 20:46:18,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:46:18,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:46:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:46:18,442 INFO L87 Difference]: Start difference. First operand 707 states and 1573 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:22,458 INFO L93 Difference]: Finished difference Result 1057 states and 2230 transitions. [2021-08-06 20:46:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:46:22,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 29 [2021-08-06 20:46:22,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:22,460 INFO L225 Difference]: With dead ends: 1057 [2021-08-06 20:46:22,460 INFO L226 Difference]: Without dead ends: 1047 [2021-08-06 20:46:22,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 3977.1ms TimeCoverageRelationStatistics Valid=572, Invalid=2968, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 20:46:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-08-06 20:46:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 709. [2021-08-06 20:46:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 2.218926553672316) internal successors, (1571), 708 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1571 transitions. [2021-08-06 20:46:22,470 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1571 transitions. Word has length 29 [2021-08-06 20:46:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:22,470 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1571 transitions. [2021-08-06 20:46:22,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1571 transitions. [2021-08-06 20:46:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:46:22,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:22,471 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] [2021-08-06 20:46:22,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 20:46:22,684 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,SelfDestructingSolverStorable54 [2021-08-06 20:46:22,685 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:22,685 INFO L82 PathProgramCache]: Analyzing trace with hash 503738900, now seen corresponding path program 22 times [2021-08-06 20:46:22,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:22,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756041379] [2021-08-06 20:46:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:22,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:22,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 63.6 percent of original size [2021-08-06 20:46:22,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 63.6 percent of original size [2021-08-06 20:46:22,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:46:22,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:46:22,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.7 percent of original size [2021-08-06 20:46:22,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.7 percent of original size [2021-08-06 20:46:22,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 65.2 percent of original size [2021-08-06 20:46:22,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 65.2 percent of original size [2021-08-06 20:46:23,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 130, result has 58.2 percent of original size [2021-08-06 20:46:23,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 130, result has 58.2 percent of original size [2021-08-06 20:46:23,205 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 150, result has 51.8 percent of original size [2021-08-06 20:46:23,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 150, result has 51.8 percent of original size [2021-08-06 20:46:23,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 95, result has 41.4 percent of original size [2021-08-06 20:46:23,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 95, result has 41.4 percent of original size [2021-08-06 20:46:23,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 90, result has 48.0 percent of original size [2021-08-06 20:46:23,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 90, result has 48.0 percent of original size [2021-08-06 20:46:23,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 80.4 percent of original size [2021-08-06 20:46:23,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 80.4 percent of original size [2021-08-06 20:46:23,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 76.9 percent of original size [2021-08-06 20:46:23,498 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 76.9 percent of original size [2021-08-06 20:46:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:23,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:23,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756041379] [2021-08-06 20:46:23,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756041379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:23,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099014483] [2021-08-06 20:46:23,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:46:23,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:23,567 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:23,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:46:26,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:46:26,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:46:26,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:26,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:26,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:26,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 93.4 percent of original size [2021-08-06 20:46:26,524 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 93.4 percent of original size [2021-08-06 20:46:26,686 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.4 percent of original size [2021-08-06 20:46:26,692 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.4 percent of original size [2021-08-06 20:46:26,906 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 20:46:26,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 83 [2021-08-06 20:46:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:27,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099014483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:27,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:27,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:46:27,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573236250] [2021-08-06 20:46:27,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:46:27,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:46:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:46:27,633 INFO L87 Difference]: Start difference. First operand 709 states and 1571 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:30,073 INFO L93 Difference]: Finished difference Result 1014 states and 2150 transitions. [2021-08-06 20:46:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:46:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 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 29 [2021-08-06 20:46:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:30,075 INFO L225 Difference]: With dead ends: 1014 [2021-08-06 20:46:30,075 INFO L226 Difference]: Without dead ends: 1004 [2021-08-06 20:46:30,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2571.8ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:46:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-08-06 20:46:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 706. [2021-08-06 20:46:30,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.217021276595745) internal successors, (1563), 705 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1563 transitions. [2021-08-06 20:46:30,083 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1563 transitions. Word has length 29 [2021-08-06 20:46:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:30,083 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1563 transitions. [2021-08-06 20:46:30,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:30,083 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1563 transitions. [2021-08-06 20:46:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:46:30,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:30,084 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] [2021-08-06 20:46:30,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 20:46:30,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 20:46:30,285 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1275612752, now seen corresponding path program 23 times [2021-08-06 20:46:30,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:30,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403191173] [2021-08-06 20:46:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:30,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:30,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 55.3 percent of original size [2021-08-06 20:46:30,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 55.3 percent of original size [2021-08-06 20:46:30,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 20:46:30,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 20:46:30,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:46:30,383 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:46:30,416 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:46:30,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:46:30,457 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 40.0 percent of original size [2021-08-06 20:46:30,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 40.0 percent of original size [2021-08-06 20:46:30,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 88.0 percent of original size [2021-08-06 20:46:30,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 88.0 percent of original size [2021-08-06 20:46:30,539 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 71.4 percent of original size [2021-08-06 20:46:30,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 71.4 percent of original size [2021-08-06 20:46:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:30,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:30,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403191173] [2021-08-06 20:46:30,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403191173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:30,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899298530] [2021-08-06 20:46:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:30,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:30,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:30,751 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:30,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:46:33,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:46:33,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:33,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:46:33,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:33,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:33,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:33,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.0 percent of original size [2021-08-06 20:46:33,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.0 percent of original size [2021-08-06 20:46:34,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.1 percent of original size [2021-08-06 20:46:34,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.1 percent of original size [2021-08-06 20:46:34,206 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 20:46:34,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 74 [2021-08-06 20:46:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:34,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899298530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:34,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:34,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 20:46:34,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23595859] [2021-08-06 20:46:34,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:46:34,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:34,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:46:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:46:34,693 INFO L87 Difference]: Start difference. First operand 706 states and 1563 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-06 20:46:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:36,946 INFO L93 Difference]: Finished difference Result 1347 states and 2760 transitions. [2021-08-06 20:46:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:46:36,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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 29 [2021-08-06 20:46:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:36,949 INFO L225 Difference]: With dead ends: 1347 [2021-08-06 20:46:36,949 INFO L226 Difference]: Without dead ends: 1335 [2021-08-06 20:46:36,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2359.2ms TimeCoverageRelationStatistics Valid=599, Invalid=2707, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:46:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-08-06 20:46:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 725. [2021-08-06 20:46:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 2.222375690607735) internal successors, (1609), 724 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1609 transitions. [2021-08-06 20:46:36,961 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1609 transitions. Word has length 29 [2021-08-06 20:46:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:36,961 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 1609 transitions. [2021-08-06 20:46:36,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-06 20:46:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1609 transitions. [2021-08-06 20:46:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:46:36,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:36,962 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] [2021-08-06 20:46:36,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 20:46:37,163 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,SelfDestructingSolverStorable56 [2021-08-06 20:46:37,163 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash -216391980, now seen corresponding path program 24 times [2021-08-06 20:46:37,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:37,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49596118] [2021-08-06 20:46:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:37,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:37,199 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 55.3 percent of original size [2021-08-06 20:46:37,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 55.3 percent of original size [2021-08-06 20:46:37,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 20:46:37,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 59.0 percent of original size [2021-08-06 20:46:37,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:46:37,254 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 60.0 percent of original size [2021-08-06 20:46:37,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:46:37,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:46:37,319 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 40.0 percent of original size [2021-08-06 20:46:37,321 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 40.0 percent of original size [2021-08-06 20:46:37,345 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 88.0 percent of original size [2021-08-06 20:46:37,349 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 88.0 percent of original size [2021-08-06 20:46:37,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 71.4 percent of original size [2021-08-06 20:46:37,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 71.4 percent of original size [2021-08-06 20:46:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:37,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:37,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49596118] [2021-08-06 20:46:37,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49596118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:37,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316731104] [2021-08-06 20:46:37,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:37,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:37,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:37,592 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:37,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:46:40,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:46:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:46:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:40,552 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:40,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:46:40,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.4 percent of original size [2021-08-06 20:46:40,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.4 percent of original size [2021-08-06 20:46:41,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:46:41,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.2 percent of original size [2021-08-06 20:46:41,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:41,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:46:41,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:46:41,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:46:41,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 102 [2021-08-06 20:46:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:42,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316731104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:42,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:42,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 20:46:42,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444084007] [2021-08-06 20:46:42,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:46:42,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:42,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:46:42,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:46:42,836 INFO L87 Difference]: Start difference. First operand 725 states and 1609 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:44,677 INFO L93 Difference]: Finished difference Result 1025 states and 2106 transitions. [2021-08-06 20:46:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:46:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 29 [2021-08-06 20:46:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:44,679 INFO L225 Difference]: With dead ends: 1025 [2021-08-06 20:46:44,679 INFO L226 Difference]: Without dead ends: 1005 [2021-08-06 20:46:44,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1841.9ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:46:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-08-06 20:46:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 729. [2021-08-06 20:46:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.223901098901099) internal successors, (1619), 728 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1619 transitions. [2021-08-06 20:46:44,691 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1619 transitions. Word has length 29 [2021-08-06 20:46:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:44,691 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 1619 transitions. [2021-08-06 20:46:44,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1619 transitions. [2021-08-06 20:46:44,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:46:44,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:44,693 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:44,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:44,908 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,SelfDestructingSolverStorable57 [2021-08-06 20:46:44,909 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:44,909 INFO L82 PathProgramCache]: Analyzing trace with hash -369043568, now seen corresponding path program 11 times [2021-08-06 20:46:44,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:44,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058851206] [2021-08-06 20:46:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:44,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:44,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 53.2 percent of original size [2021-08-06 20:46:44,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 53.2 percent of original size [2021-08-06 20:46:45,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 67.0 percent of original size [2021-08-06 20:46:45,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 67.0 percent of original size [2021-08-06 20:46:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:45,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:45,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058851206] [2021-08-06 20:46:45,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058851206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:45,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269404886] [2021-08-06 20:46:45,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:46:45,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:45,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:45,133 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:45,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:46:48,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:46:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:46:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 20:46:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:48,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:46:48,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:46:48,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.2 percent of original size [2021-08-06 20:46:48,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.2 percent of original size [2021-08-06 20:46:48,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 48 [2021-08-06 20:46:48,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:46:48,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:46:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:48,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269404886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:48,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:48,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 20:46:48,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054791717] [2021-08-06 20:46:48,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:46:48,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:46:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:46:48,891 INFO L87 Difference]: Start difference. First operand 729 states and 1619 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:48,992 INFO L93 Difference]: Finished difference Result 788 states and 1704 transitions. [2021-08-06 20:46:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:46:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:46:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:48,994 INFO L225 Difference]: With dead ends: 788 [2021-08-06 20:46:48,994 INFO L226 Difference]: Without dead ends: 783 [2021-08-06 20:46:48,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:46:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-08-06 20:46:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 733. [2021-08-06 20:46:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 2.2254098360655736) internal successors, (1629), 732 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1629 transitions. [2021-08-06 20:46:49,006 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1629 transitions. Word has length 29 [2021-08-06 20:46:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:49,006 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 1629 transitions. [2021-08-06 20:46:49,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1629 transitions. [2021-08-06 20:46:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:46:49,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:49,007 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] [2021-08-06 20:46:49,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:49,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 20:46:49,233 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:49,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:49,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2094619316, now seen corresponding path program 25 times [2021-08-06 20:46:49,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:49,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661407168] [2021-08-06 20:46:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:49,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:49,266 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 21.9 percent of original size [2021-08-06 20:46:49,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 21.9 percent of original size [2021-08-06 20:46:49,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 24.2 percent of original size [2021-08-06 20:46:49,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 24.2 percent of original size [2021-08-06 20:46:49,291 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 26.5 percent of original size [2021-08-06 20:46:49,292 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 26.5 percent of original size [2021-08-06 20:46:49,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 28.6 percent of original size [2021-08-06 20:46:49,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 28.6 percent of original size [2021-08-06 20:46:49,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:46:49,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:46:49,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 91.9 percent of original size [2021-08-06 20:46:49,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 91.9 percent of original size [2021-08-06 20:46:49,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 71.8 percent of original size [2021-08-06 20:46:49,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 71.8 percent of original size [2021-08-06 20:46:49,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 77.7 percent of original size [2021-08-06 20:46:49,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 77.7 percent of original size [2021-08-06 20:46:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:49,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:49,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661407168] [2021-08-06 20:46:49,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661407168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:49,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354749593] [2021-08-06 20:46:49,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:46:49,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:49,685 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:49,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:46:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:52,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:46:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:46:52,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.5 percent of original size [2021-08-06 20:46:52,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.5 percent of original size [2021-08-06 20:46:52,877 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.0 percent of original size [2021-08-06 20:46:52,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.0 percent of original size [2021-08-06 20:46:53,081 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.4 percent of original size [2021-08-06 20:46:53,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.4 percent of original size [2021-08-06 20:46:53,353 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 20:46:53,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 83 [2021-08-06 20:46:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:53,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354749593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:53,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:46:53,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 20:46:53,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167262318] [2021-08-06 20:46:53,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:46:53,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:46:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:46:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:46:53,899 INFO L87 Difference]: Start difference. First operand 733 states and 1629 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-06 20:46:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:46:57,399 INFO L93 Difference]: Finished difference Result 1066 states and 2253 transitions. [2021-08-06 20:46:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:46:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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 29 [2021-08-06 20:46:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:46:57,401 INFO L225 Difference]: With dead ends: 1066 [2021-08-06 20:46:57,401 INFO L226 Difference]: Without dead ends: 1052 [2021-08-06 20:46:57,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1687.5ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:46:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-08-06 20:46:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 738. [2021-08-06 20:46:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.226594301221167) internal successors, (1641), 737 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:46:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1641 transitions. [2021-08-06 20:46:57,409 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1641 transitions. Word has length 29 [2021-08-06 20:46:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:46:57,410 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1641 transitions. [2021-08-06 20:46:57,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-06 20:46:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1641 transitions. [2021-08-06 20:46:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:46:57,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:46:57,411 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:46:57,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 20:46:57,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:57,611 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:46:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:46:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash -707381104, now seen corresponding path program 12 times [2021-08-06 20:46:57,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:46:57,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644798522] [2021-08-06 20:46:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:46:57,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:46:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:46:57,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 72.4 percent of original size [2021-08-06 20:46:57,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 72.4 percent of original size [2021-08-06 20:46:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:46:57,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:46:57,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644798522] [2021-08-06 20:46:57,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644798522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:46:57,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873412817] [2021-08-06 20:46:57,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:46:57,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:46:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:46:57,835 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:46:57,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:47:00,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:47:00,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 20:47:00,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:01,026 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:47:01,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:47:01,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.4 percent of original size [2021-08-06 20:47:01,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.4 percent of original size [2021-08-06 20:47:01,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 48 [2021-08-06 20:47:01,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:01,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:01,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873412817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:01,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:01,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 20:47:01,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263887762] [2021-08-06 20:47:01,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:47:01,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:47:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:47:01,640 INFO L87 Difference]: Start difference. First operand 738 states and 1641 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:01,775 INFO L93 Difference]: Finished difference Result 845 states and 1807 transitions. [2021-08-06 20:47:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:47:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:47:01,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:01,777 INFO L225 Difference]: With dead ends: 845 [2021-08-06 20:47:01,777 INFO L226 Difference]: Without dead ends: 840 [2021-08-06 20:47:01,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:47:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-08-06 20:47:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 750. [2021-08-06 20:47:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.2283044058744994) internal successors, (1669), 749 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1669 transitions. [2021-08-06 20:47:01,789 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1669 transitions. Word has length 29 [2021-08-06 20:47:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:01,789 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1669 transitions. [2021-08-06 20:47:01,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1669 transitions. [2021-08-06 20:47:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:47:01,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:01,791 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:01,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 20:47:02,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:02,005 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 151745800, now seen corresponding path program 19 times [2021-08-06 20:47:02,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:02,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544209683] [2021-08-06 20:47:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:02,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:02,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 27.8 percent of original size [2021-08-06 20:47:02,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 27.8 percent of original size [2021-08-06 20:47:02,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 29.1 percent of original size [2021-08-06 20:47:02,120 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 29.1 percent of original size [2021-08-06 20:47:02,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 30.4 percent of original size [2021-08-06 20:47:02,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 30.4 percent of original size [2021-08-06 20:47:02,159 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 31.6 percent of original size [2021-08-06 20:47:02,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 31.6 percent of original size [2021-08-06 20:47:02,187 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 81.7 percent of original size [2021-08-06 20:47:02,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 81.7 percent of original size [2021-08-06 20:47:02,252 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 84.8 percent of original size [2021-08-06 20:47:02,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 84.8 percent of original size [2021-08-06 20:47:02,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.5 percent of original size [2021-08-06 20:47:02,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.5 percent of original size [2021-08-06 20:47:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:02,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:02,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544209683] [2021-08-06 20:47:02,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544209683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:02,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454550444] [2021-08-06 20:47:02,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:47:02,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:02,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:02,563 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:02,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:47:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:05,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:47:05,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:05,751 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:47:05,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:47:06,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.0 percent of original size [2021-08-06 20:47:06,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.0 percent of original size [2021-08-06 20:47:06,524 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 20:47:06,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 106 [2021-08-06 20:47:07,297 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:07,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:07,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454550444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:07,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:07,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-06 20:47:07,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709934798] [2021-08-06 20:47:07,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:47:07,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:47:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:47:07,315 INFO L87 Difference]: Start difference. First operand 750 states and 1669 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:10,621 INFO L93 Difference]: Finished difference Result 1037 states and 2226 transitions. [2021-08-06 20:47:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:47:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:47:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:10,624 INFO L225 Difference]: With dead ends: 1037 [2021-08-06 20:47:10,624 INFO L226 Difference]: Without dead ends: 1027 [2021-08-06 20:47:10,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1112.5ms TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:47:10,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-08-06 20:47:10,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 750. [2021-08-06 20:47:10,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 2.2283044058744994) internal successors, (1669), 749 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1669 transitions. [2021-08-06 20:47:10,638 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1669 transitions. Word has length 29 [2021-08-06 20:47:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:10,638 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 1669 transitions. [2021-08-06 20:47:10,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1669 transitions. [2021-08-06 20:47:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:47:10,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:10,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:10,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 20:47:10,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:10,852 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:10,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1425487112, now seen corresponding path program 20 times [2021-08-06 20:47:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:10,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753779543] [2021-08-06 20:47:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:10,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:10,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 27.8 percent of original size [2021-08-06 20:47:10,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 27.8 percent of original size [2021-08-06 20:47:10,913 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 29.1 percent of original size [2021-08-06 20:47:10,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 29.1 percent of original size [2021-08-06 20:47:10,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 30.4 percent of original size [2021-08-06 20:47:10,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 30.4 percent of original size [2021-08-06 20:47:10,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 31.6 percent of original size [2021-08-06 20:47:10,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 31.6 percent of original size [2021-08-06 20:47:10,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 81.9 percent of original size [2021-08-06 20:47:10,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 81.9 percent of original size [2021-08-06 20:47:11,048 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 71.4 percent of original size [2021-08-06 20:47:11,053 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 71.4 percent of original size [2021-08-06 20:47:11,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 61.7 percent of original size [2021-08-06 20:47:11,111 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 61.7 percent of original size [2021-08-06 20:47:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:11,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:11,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753779543] [2021-08-06 20:47:11,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753779543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:11,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272169886] [2021-08-06 20:47:11,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:11,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:11,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:11,375 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:11,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:47:14,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:47:14,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:47:14,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:14,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:47:14,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:47:14,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:47:14,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:47:15,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:15,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:47:15,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 112 [2021-08-06 20:47:16,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:16,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:16,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272169886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:16,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:16,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-08-06 20:47:16,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536263458] [2021-08-06 20:47:16,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:47:16,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:16,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:47:16,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:47:16,539 INFO L87 Difference]: Start difference. First operand 750 states and 1669 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:19,986 INFO L93 Difference]: Finished difference Result 1064 states and 2342 transitions. [2021-08-06 20:47:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:47:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:47:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:19,988 INFO L225 Difference]: With dead ends: 1064 [2021-08-06 20:47:19,988 INFO L226 Difference]: Without dead ends: 1052 [2021-08-06 20:47:19,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3578.8ms TimeCoverageRelationStatistics Valid=796, Invalid=3110, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:47:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-08-06 20:47:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 777. [2021-08-06 20:47:20,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 2.220360824742268) internal successors, (1723), 776 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1723 transitions. [2021-08-06 20:47:20,008 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1723 transitions. Word has length 29 [2021-08-06 20:47:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:20,009 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1723 transitions. [2021-08-06 20:47:20,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1723 transitions. [2021-08-06 20:47:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:47:20,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:20,010 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:20,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:20,211 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,SelfDestructingSolverStorable62 [2021-08-06 20:47:20,211 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:20,212 INFO L82 PathProgramCache]: Analyzing trace with hash 684913928, now seen corresponding path program 21 times [2021-08-06 20:47:20,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:20,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921583721] [2021-08-06 20:47:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:20,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:20,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 27.8 percent of original size [2021-08-06 20:47:20,256 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 27.8 percent of original size [2021-08-06 20:47:20,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 29.1 percent of original size [2021-08-06 20:47:20,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 29.1 percent of original size [2021-08-06 20:47:20,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 30.4 percent of original size [2021-08-06 20:47:20,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 30.4 percent of original size [2021-08-06 20:47:20,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 31.6 percent of original size [2021-08-06 20:47:20,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 31.6 percent of original size [2021-08-06 20:47:20,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 81.9 percent of original size [2021-08-06 20:47:20,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 81.9 percent of original size [2021-08-06 20:47:20,383 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 84.4 percent of original size [2021-08-06 20:47:20,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 84.4 percent of original size [2021-08-06 20:47:20,433 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 66.7 percent of original size [2021-08-06 20:47:20,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 66.7 percent of original size [2021-08-06 20:47:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:20,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:20,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921583721] [2021-08-06 20:47:20,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921583721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:20,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207487791] [2021-08-06 20:47:20,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:47:20,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:20,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:20,682 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:20,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:47:23,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:47:23,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:23,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:47:23,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:24,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:47:24,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:47:24,291 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.3 percent of original size [2021-08-06 20:47:24,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.3 percent of original size [2021-08-06 20:47:24,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:24,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:24,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:24,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:24,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:47:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:24,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:47:24,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 92 treesize of output 168 [2021-08-06 20:47:36,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:47:36,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 83.3 percent of original size [2021-08-06 20:47:36,834 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:36,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:36,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207487791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:36,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:36,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 20:47:36,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349446190] [2021-08-06 20:47:36,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:47:36,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:47:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:47:36,852 INFO L87 Difference]: Start difference. First operand 777 states and 1723 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:40,948 INFO L93 Difference]: Finished difference Result 1216 states and 2578 transitions. [2021-08-06 20:47:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 20:47:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:47:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:40,950 INFO L225 Difference]: With dead ends: 1216 [2021-08-06 20:47:40,950 INFO L226 Difference]: Without dead ends: 1200 [2021-08-06 20:47:40,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 4154.8ms TimeCoverageRelationStatistics Valid=897, Invalid=4505, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 20:47:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-08-06 20:47:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 780. [2021-08-06 20:47:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.2233632862644415) internal successors, (1732), 779 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1732 transitions. [2021-08-06 20:47:40,965 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1732 transitions. Word has length 29 [2021-08-06 20:47:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:40,966 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 1732 transitions. [2021-08-06 20:47:40,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1732 transitions. [2021-08-06 20:47:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:47:40,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:40,967 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:47:41,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:41,180 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,SelfDestructingSolverStorable63 [2021-08-06 20:47:41,181 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:41,181 INFO L82 PathProgramCache]: Analyzing trace with hash -807090804, now seen corresponding path program 22 times [2021-08-06 20:47:41,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:41,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25091352] [2021-08-06 20:47:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:41,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:41,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 27.8 percent of original size [2021-08-06 20:47:41,231 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 27.8 percent of original size [2021-08-06 20:47:41,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 29.1 percent of original size [2021-08-06 20:47:41,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 29.1 percent of original size [2021-08-06 20:47:41,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 30.4 percent of original size [2021-08-06 20:47:41,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 30.4 percent of original size [2021-08-06 20:47:41,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 31.6 percent of original size [2021-08-06 20:47:41,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 31.6 percent of original size [2021-08-06 20:47:41,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 81.9 percent of original size [2021-08-06 20:47:41,321 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 81.9 percent of original size [2021-08-06 20:47:41,375 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 84.4 percent of original size [2021-08-06 20:47:41,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 84.4 percent of original size [2021-08-06 20:47:41,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 66.7 percent of original size [2021-08-06 20:47:41,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 66.7 percent of original size [2021-08-06 20:47:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:41,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:41,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25091352] [2021-08-06 20:47:41,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25091352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:41,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088401653] [2021-08-06 20:47:41,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:47:41,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:41,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:41,803 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:41,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:47:45,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:47:45,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:45,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:47:45,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:45,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:47:45,219 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.9 percent of original size [2021-08-06 20:47:45,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.0 percent of original size [2021-08-06 20:47:45,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.0 percent of original size [2021-08-06 20:47:45,828 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:47:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 67 [2021-08-06 20:47:46,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:46,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 82.6 percent of original size [2021-08-06 20:47:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:46,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088401653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:46,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:46,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-08-06 20:47:46,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840399913] [2021-08-06 20:47:46,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:47:46,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:46,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:47:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:47:46,100 INFO L87 Difference]: Start difference. First operand 780 states and 1732 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-08-06 20:47:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:47,866 INFO L93 Difference]: Finished difference Result 1098 states and 2328 transitions. [2021-08-06 20:47:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:47:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 29 [2021-08-06 20:47:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:47,868 INFO L225 Difference]: With dead ends: 1098 [2021-08-06 20:47:47,869 INFO L226 Difference]: Without dead ends: 1088 [2021-08-06 20:47:47,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1873.2ms TimeCoverageRelationStatistics Valid=494, Invalid=2262, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:47:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-08-06 20:47:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 803. [2021-08-06 20:47:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 2.2219451371571073) internal successors, (1782), 802 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1782 transitions. [2021-08-06 20:47:47,879 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1782 transitions. Word has length 29 [2021-08-06 20:47:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:47,879 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1782 transitions. [2021-08-06 20:47:47,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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) [2021-08-06 20:47:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1782 transitions. [2021-08-06 20:47:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:47:47,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:47,880 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] [2021-08-06 20:47:47,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 20:47:48,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:48,081 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash 149728648, now seen corresponding path program 26 times [2021-08-06 20:47:48,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:48,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720311678] [2021-08-06 20:47:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:48,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:48,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 44.9 percent of original size [2021-08-06 20:47:48,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 44.9 percent of original size [2021-08-06 20:47:48,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 46.3 percent of original size [2021-08-06 20:47:48,197 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 46.3 percent of original size [2021-08-06 20:47:48,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 46.8 percent of original size [2021-08-06 20:47:48,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 46.8 percent of original size [2021-08-06 20:47:48,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 47.3 percent of original size [2021-08-06 20:47:48,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 47.3 percent of original size [2021-08-06 20:47:48,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 84, result has 45.1 percent of original size [2021-08-06 20:47:48,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 84, result has 45.1 percent of original size [2021-08-06 20:47:48,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 71.2 percent of original size [2021-08-06 20:47:48,531 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 71.2 percent of original size [2021-08-06 20:47:48,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 52, result has 68.1 percent of original size [2021-08-06 20:47:48,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 52, result has 68.1 percent of original size [2021-08-06 20:47:48,697 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 81.7 percent of original size [2021-08-06 20:47:48,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 81.7 percent of original size [2021-08-06 20:47:48,764 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 64.3 percent of original size [2021-08-06 20:47:48,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 64.3 percent of original size [2021-08-06 20:47:48,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 55.9 percent of original size [2021-08-06 20:47:48,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 55.9 percent of original size [2021-08-06 20:47:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:48,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:48,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720311678] [2021-08-06 20:47:48,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720311678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:48,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123472537] [2021-08-06 20:47:48,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:47:48,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:48,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:48,897 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:48,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:47:52,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:47:52,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:47:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:47:52,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.5 percent of original size [2021-08-06 20:47:52,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.5 percent of original size [2021-08-06 20:47:52,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.0 percent of original size [2021-08-06 20:47:52,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.0 percent of original size [2021-08-06 20:47:53,009 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.0 percent of original size [2021-08-06 20:47:53,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.0 percent of original size [2021-08-06 20:47:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:47:53,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:47:53,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 70 [2021-08-06 20:47:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:53,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123472537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:53,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:47:53,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 20:47:53,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277363230] [2021-08-06 20:47:53,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:47:53,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:47:53,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:47:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:47:53,612 INFO L87 Difference]: Start difference. First operand 803 states and 1782 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:47:55,310 INFO L93 Difference]: Finished difference Result 1110 states and 2363 transitions. [2021-08-06 20:47:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:47:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 29 [2021-08-06 20:47:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:47:55,312 INFO L225 Difference]: With dead ends: 1110 [2021-08-06 20:47:55,312 INFO L226 Difference]: Without dead ends: 1105 [2021-08-06 20:47:55,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1889.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:47:55,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-08-06 20:47:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 805. [2021-08-06 20:47:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 2.2238805970149254) internal successors, (1788), 804 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1788 transitions. [2021-08-06 20:47:55,322 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1788 transitions. Word has length 29 [2021-08-06 20:47:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:47:55,322 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1788 transitions. [2021-08-06 20:47:55,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:47:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1788 transitions. [2021-08-06 20:47:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:47:55,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:47:55,324 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] [2021-08-06 20:47:55,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 20:47:55,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:55,549 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:47:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:47:55,549 INFO L82 PathProgramCache]: Analyzing trace with hash -772059060, now seen corresponding path program 27 times [2021-08-06 20:47:55,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:47:55,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497437171] [2021-08-06 20:47:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:47:55,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:47:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:47:55,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 46.1 percent of original size [2021-08-06 20:47:55,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 46.1 percent of original size [2021-08-06 20:47:55,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 46.6 percent of original size [2021-08-06 20:47:55,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 46.6 percent of original size [2021-08-06 20:47:55,719 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 47.1 percent of original size [2021-08-06 20:47:55,726 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 47.1 percent of original size [2021-08-06 20:47:55,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 47.6 percent of original size [2021-08-06 20:47:55,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 47.6 percent of original size [2021-08-06 20:47:55,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 53.3 percent of original size [2021-08-06 20:47:55,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 53.3 percent of original size [2021-08-06 20:47:55,929 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 70.8 percent of original size [2021-08-06 20:47:55,944 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 70.8 percent of original size [2021-08-06 20:47:56,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 51, result has 68.5 percent of original size [2021-08-06 20:47:56,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 51, result has 68.5 percent of original size [2021-08-06 20:47:56,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 62.4 percent of original size [2021-08-06 20:47:56,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 62.4 percent of original size [2021-08-06 20:47:56,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 87.0 percent of original size [2021-08-06 20:47:56,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 87.0 percent of original size [2021-08-06 20:47:56,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 20:47:56,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 20:47:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:47:56,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:47:56,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497437171] [2021-08-06 20:47:56,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497437171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:47:56,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181190215] [2021-08-06 20:47:56,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:47:56,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:47:56,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:47:56,326 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:47:56,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:47:59,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:47:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:47:59,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:47:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:00,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:48:00,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:48:00,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.4 percent of original size [2021-08-06 20:48:00,166 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.4 percent of original size [2021-08-06 20:48:00,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.8 percent of original size [2021-08-06 20:48:00,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.8 percent of original size [2021-08-06 20:48:00,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:48:00,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:48:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:48:00,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:48:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 111 [2021-08-06 20:48:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:02,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181190215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:02,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:02,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 20:48:02,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399209998] [2021-08-06 20:48:02,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:48:02,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:48:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:48:02,889 INFO L87 Difference]: Start difference. First operand 805 states and 1788 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:06,292 INFO L93 Difference]: Finished difference Result 1257 states and 2627 transitions. [2021-08-06 20:48:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:48:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 29 [2021-08-06 20:48:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:06,295 INFO L225 Difference]: With dead ends: 1257 [2021-08-06 20:48:06,295 INFO L226 Difference]: Without dead ends: 1247 [2021-08-06 20:48:06,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 3516.9ms TimeCoverageRelationStatistics Valid=408, Invalid=2562, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:48:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-08-06 20:48:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 836. [2021-08-06 20:48:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.2347305389221557) internal successors, (1866), 835 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1866 transitions. [2021-08-06 20:48:06,310 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1866 transitions. Word has length 29 [2021-08-06 20:48:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:06,310 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1866 transitions. [2021-08-06 20:48:06,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1866 transitions. [2021-08-06 20:48:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:48:06,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:06,312 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] [2021-08-06 20:48:06,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:06,536 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,SelfDestructingSolverStorable66 [2021-08-06 20:48:06,537 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:06,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1433784140, now seen corresponding path program 28 times [2021-08-06 20:48:06,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:06,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109885989] [2021-08-06 20:48:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:06,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:06,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 13.5 percent of original size [2021-08-06 20:48:06,577 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 13.5 percent of original size [2021-08-06 20:48:06,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 15.1 percent of original size [2021-08-06 20:48:06,588 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 15.1 percent of original size [2021-08-06 20:48:06,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 16.7 percent of original size [2021-08-06 20:48:06,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 16.7 percent of original size [2021-08-06 20:48:06,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 18.2 percent of original size [2021-08-06 20:48:06,622 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 18.2 percent of original size [2021-08-06 20:48:06,643 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 17.6 percent of original size [2021-08-06 20:48:06,646 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 17.6 percent of original size [2021-08-06 20:48:06,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 81.0 percent of original size [2021-08-06 20:48:06,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 81.0 percent of original size [2021-08-06 20:48:06,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 70.2 percent of original size [2021-08-06 20:48:06,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 70.2 percent of original size [2021-08-06 20:48:06,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 85.2 percent of original size [2021-08-06 20:48:06,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 85.2 percent of original size [2021-08-06 20:48:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:07,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:07,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109885989] [2021-08-06 20:48:07,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109885989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:07,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506048069] [2021-08-06 20:48:07,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:07,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:07,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:07,020 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:07,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:48:10,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:48:10,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:10,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:48:10,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:10,857 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.3 percent of original size [2021-08-06 20:48:10,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.3 percent of original size [2021-08-06 20:48:11,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.4 percent of original size [2021-08-06 20:48:11,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.4 percent of original size [2021-08-06 20:48:11,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.9 percent of original size [2021-08-06 20:48:11,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.9 percent of original size [2021-08-06 20:48:11,454 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 20:48:11,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 97 treesize of output 85 [2021-08-06 20:48:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:12,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506048069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:12,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:12,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 20:48:12,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298461932] [2021-08-06 20:48:12,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:48:12,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:48:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:48:12,086 INFO L87 Difference]: Start difference. First operand 836 states and 1866 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-06 20:48:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:12,673 INFO L93 Difference]: Finished difference Result 1121 states and 2429 transitions. [2021-08-06 20:48:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:48:12,673 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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 29 [2021-08-06 20:48:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:12,674 INFO L225 Difference]: With dead ends: 1121 [2021-08-06 20:48:12,675 INFO L226 Difference]: Without dead ends: 1116 [2021-08-06 20:48:12,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:48:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-06 20:48:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 837. [2021-08-06 20:48:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.236842105263158) internal successors, (1870), 836 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1870 transitions. [2021-08-06 20:48:12,685 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1870 transitions. Word has length 29 [2021-08-06 20:48:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:12,685 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1870 transitions. [2021-08-06 20:48:12,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-06 20:48:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1870 transitions. [2021-08-06 20:48:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:48:12,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:12,686 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] [2021-08-06 20:48:12,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:12,886 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,SelfDestructingSolverStorable67 [2021-08-06 20:48:12,886 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:12,887 INFO L82 PathProgramCache]: Analyzing trace with hash 460429260, now seen corresponding path program 29 times [2021-08-06 20:48:12,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:12,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609096740] [2021-08-06 20:48:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:12,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:12,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 13.5 percent of original size [2021-08-06 20:48:12,923 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 13.5 percent of original size [2021-08-06 20:48:12,933 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 15.1 percent of original size [2021-08-06 20:48:12,935 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 15.1 percent of original size [2021-08-06 20:48:12,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 16.7 percent of original size [2021-08-06 20:48:12,950 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 16.7 percent of original size [2021-08-06 20:48:12,968 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 18.2 percent of original size [2021-08-06 20:48:12,970 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 18.2 percent of original size [2021-08-06 20:48:12,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 19.7 percent of original size [2021-08-06 20:48:12,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 19.7 percent of original size [2021-08-06 20:48:13,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 74, result has 18.7 percent of original size [2021-08-06 20:48:13,020 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 74, result has 18.7 percent of original size [2021-08-06 20:48:13,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 70.5 percent of original size [2021-08-06 20:48:13,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 70.5 percent of original size [2021-08-06 20:48:13,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 85.1 percent of original size [2021-08-06 20:48:13,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 85.1 percent of original size [2021-08-06 20:48:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:13,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:13,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609096740] [2021-08-06 20:48:13,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609096740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:13,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501388530] [2021-08-06 20:48:13,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:48:13,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:13,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:13,332 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:13,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:48:17,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:48:17,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 20:48:17,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:17,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:48:17,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 91.5 percent of original size [2021-08-06 20:48:17,433 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.4 percent of original size [2021-08-06 20:48:17,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.4 percent of original size [2021-08-06 20:48:17,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.9 percent of original size [2021-08-06 20:48:17,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.9 percent of original size [2021-08-06 20:48:17,811 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 20:48:17,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 97 treesize of output 85 [2021-08-06 20:48:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:18,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501388530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:18,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:18,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 20:48:18,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151430518] [2021-08-06 20:48:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:48:18,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:48:18,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:48:18,466 INFO L87 Difference]: Start difference. First operand 837 states and 1870 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-06 20:48:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:18,958 INFO L93 Difference]: Finished difference Result 1121 states and 2439 transitions. [2021-08-06 20:48:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:48:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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 29 [2021-08-06 20:48:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:18,963 INFO L225 Difference]: With dead ends: 1121 [2021-08-06 20:48:18,963 INFO L226 Difference]: Without dead ends: 1116 [2021-08-06 20:48:18,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 708.4ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:48:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-06 20:48:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 837. [2021-08-06 20:48:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.236842105263158) internal successors, (1870), 836 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1870 transitions. [2021-08-06 20:48:18,973 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1870 transitions. Word has length 29 [2021-08-06 20:48:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:18,974 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1870 transitions. [2021-08-06 20:48:18,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 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) [2021-08-06 20:48:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1870 transitions. [2021-08-06 20:48:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:48:18,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:18,975 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] [2021-08-06 20:48:19,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:19,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:19,175 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash 510118160, now seen corresponding path program 30 times [2021-08-06 20:48:19,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:19,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137600337] [2021-08-06 20:48:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:19,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:19,211 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 21.9 percent of original size [2021-08-06 20:48:19,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 21.9 percent of original size [2021-08-06 20:48:19,222 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 24.2 percent of original size [2021-08-06 20:48:19,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 24.2 percent of original size [2021-08-06 20:48:19,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 26.5 percent of original size [2021-08-06 20:48:19,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 26.5 percent of original size [2021-08-06 20:48:19,257 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 28.6 percent of original size [2021-08-06 20:48:19,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 28.6 percent of original size [2021-08-06 20:48:19,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:48:19,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 30.8 percent of original size [2021-08-06 20:48:19,307 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 77.3 percent of original size [2021-08-06 20:48:19,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 77.3 percent of original size [2021-08-06 20:48:19,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 85.1 percent of original size [2021-08-06 20:48:19,373 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 85.1 percent of original size [2021-08-06 20:48:19,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 73.9 percent of original size [2021-08-06 20:48:19,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 73.9 percent of original size [2021-08-06 20:48:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:19,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:19,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137600337] [2021-08-06 20:48:19,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137600337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:19,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952441244] [2021-08-06 20:48:19,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:48:19,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:19,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:19,618 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:19,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:48:23,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:48:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 20:48:23,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:23,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:48:23,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:48:23,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.3 percent of original size [2021-08-06 20:48:23,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.3 percent of original size [2021-08-06 20:48:23,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.8 percent of original size [2021-08-06 20:48:23,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.8 percent of original size [2021-08-06 20:48:24,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:48:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:48:24,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:48:24,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:48:24,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:48:24,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 79 [2021-08-06 20:48:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:24,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952441244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:24,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:24,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-06 20:48:24,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401298222] [2021-08-06 20:48:24,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:48:24,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:48:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:48:24,706 INFO L87 Difference]: Start difference. First operand 837 states and 1870 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:26,320 INFO L93 Difference]: Finished difference Result 1156 states and 2482 transitions. [2021-08-06 20:48:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:48:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 29 [2021-08-06 20:48:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:26,322 INFO L225 Difference]: With dead ends: 1156 [2021-08-06 20:48:26,322 INFO L226 Difference]: Without dead ends: 1146 [2021-08-06 20:48:26,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1627.9ms TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:48:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-08-06 20:48:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 837. [2021-08-06 20:48:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.236842105263158) internal successors, (1870), 836 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1870 transitions. [2021-08-06 20:48:26,336 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1870 transitions. Word has length 29 [2021-08-06 20:48:26,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:26,337 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1870 transitions. [2021-08-06 20:48:26,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:26,337 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1870 transitions. [2021-08-06 20:48:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:48:26,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:26,338 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:26,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:26,552 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,SelfDestructingSolverStorable69 [2021-08-06 20:48:26,552 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:26,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:26,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1601714702, now seen corresponding path program 23 times [2021-08-06 20:48:26,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:26,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891157444] [2021-08-06 20:48:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:26,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:26,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:26,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891157444] [2021-08-06 20:48:26,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891157444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:26,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973610147] [2021-08-06 20:48:26,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:48:26,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:26,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:26,669 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:26,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:48:30,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:48:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:30,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:48:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:30,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:30,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:30,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973610147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:30,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:30,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:48:30,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309621129] [2021-08-06 20:48:30,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:48:30,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:48:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:48:30,790 INFO L87 Difference]: Start difference. First operand 837 states and 1870 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) 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) [2021-08-06 20:48:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:31,869 INFO L93 Difference]: Finished difference Result 1809 states and 3589 transitions. [2021-08-06 20:48:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 20:48:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) 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 31 [2021-08-06 20:48:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:31,872 INFO L225 Difference]: With dead ends: 1809 [2021-08-06 20:48:31,872 INFO L226 Difference]: Without dead ends: 1809 [2021-08-06 20:48:31,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=1042, Invalid=4070, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:48:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2021-08-06 20:48:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 895. [2021-08-06 20:48:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.2539149888143175) internal successors, (2015), 894 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2015 transitions. [2021-08-06 20:48:31,885 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2015 transitions. Word has length 31 [2021-08-06 20:48:31,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:31,885 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 2015 transitions. [2021-08-06 20:48:31,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) 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) [2021-08-06 20:48:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2015 transitions. [2021-08-06 20:48:31,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:48:31,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:31,887 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:31,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:32,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:32,087 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:32,088 INFO L82 PathProgramCache]: Analyzing trace with hash -29329934, now seen corresponding path program 24 times [2021-08-06 20:48:32,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:32,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497249042] [2021-08-06 20:48:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:32,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:32,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:32,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497249042] [2021-08-06 20:48:32,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497249042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:32,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79820382] [2021-08-06 20:48:32,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:48:32,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:32,175 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:32,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:48:36,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:48:36,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:36,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:48:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:36,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:36,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:36,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79820382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:36,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:36,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 20:48:36,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982238042] [2021-08-06 20:48:36,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:48:36,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:48:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:48:36,311 INFO L87 Difference]: Start difference. First operand 895 states and 2015 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:37,167 INFO L93 Difference]: Finished difference Result 1441 states and 2926 transitions. [2021-08-06 20:48:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 20:48:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 31 [2021-08-06 20:48:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:37,169 INFO L225 Difference]: With dead ends: 1441 [2021-08-06 20:48:37,169 INFO L226 Difference]: Without dead ends: 1441 [2021-08-06 20:48:37,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 663.3ms TimeCoverageRelationStatistics Valid=919, Invalid=3241, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 20:48:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-08-06 20:48:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 871. [2021-08-06 20:48:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.240229885057471) internal successors, (1949), 870 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1949 transitions. [2021-08-06 20:48:37,189 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1949 transitions. Word has length 31 [2021-08-06 20:48:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:37,189 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 1949 transitions. [2021-08-06 20:48:37,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1949 transitions. [2021-08-06 20:48:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:48:37,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:37,191 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:37,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:37,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:37,417 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash -796056078, now seen corresponding path program 25 times [2021-08-06 20:48:37,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:37,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936329562] [2021-08-06 20:48:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:37,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:37,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:37,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936329562] [2021-08-06 20:48:37,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936329562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:37,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477435329] [2021-08-06 20:48:37,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:48:37,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:37,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:37,525 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:37,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:48:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:41,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:48:41,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:41,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:41,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:41,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477435329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:41,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:41,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:48:41,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883187363] [2021-08-06 20:48:41,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:48:41,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:48:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:48:41,682 INFO L87 Difference]: Start difference. First operand 871 states and 1949 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:42,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:42,128 INFO L93 Difference]: Finished difference Result 1288 states and 2661 transitions. [2021-08-06 20:48:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:48:42,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:48:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:42,130 INFO L225 Difference]: With dead ends: 1288 [2021-08-06 20:48:42,130 INFO L226 Difference]: Without dead ends: 1288 [2021-08-06 20:48:42,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:48:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-08-06 20:48:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 871. [2021-08-06 20:48:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.240229885057471) internal successors, (1949), 870 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1949 transitions. [2021-08-06 20:48:42,141 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1949 transitions. Word has length 31 [2021-08-06 20:48:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:42,141 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 1949 transitions. [2021-08-06 20:48:42,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1949 transitions. [2021-08-06 20:48:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:48:42,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:42,142 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:42,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 20:48:42,342 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,SelfDestructingSolverStorable72 [2021-08-06 20:48:42,343 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:42,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1248817682, now seen corresponding path program 26 times [2021-08-06 20:48:42,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:42,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438835642] [2021-08-06 20:48:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:42,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:42,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:42,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438835642] [2021-08-06 20:48:42,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438835642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:42,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470354293] [2021-08-06 20:48:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:48:42,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:42,412 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:42,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:48:46,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:48:46,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:46,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:48:46,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:46,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:46,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:46,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470354293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:46,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:46,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:48:46,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967462437] [2021-08-06 20:48:46,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:48:46,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:46,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:48:46,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:48:46,539 INFO L87 Difference]: Start difference. First operand 871 states and 1949 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:47,386 INFO L93 Difference]: Finished difference Result 2010 states and 3942 transitions. [2021-08-06 20:48:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 20:48:47,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:48:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:47,389 INFO L225 Difference]: With dead ends: 2010 [2021-08-06 20:48:47,389 INFO L226 Difference]: Without dead ends: 2010 [2021-08-06 20:48:47,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 607.9ms TimeCoverageRelationStatistics Valid=867, Invalid=3165, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:48:47,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-08-06 20:48:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 877. [2021-08-06 20:48:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 2.2374429223744294) internal successors, (1960), 876 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1960 transitions. [2021-08-06 20:48:47,403 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1960 transitions. Word has length 31 [2021-08-06 20:48:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:47,403 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1960 transitions. [2021-08-06 20:48:47,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1960 transitions. [2021-08-06 20:48:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:48:47,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:47,405 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:47,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:47,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:47,605 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:47,605 INFO L82 PathProgramCache]: Analyzing trace with hash 239582578, now seen corresponding path program 27 times [2021-08-06 20:48:47,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:47,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690562747] [2021-08-06 20:48:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:47,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:47,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:47,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690562747] [2021-08-06 20:48:47,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690562747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:47,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804038936] [2021-08-06 20:48:47,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:48:47,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:47,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:47,676 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:47,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:48:51,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:48:51,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:48:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:48:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:51,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804038936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:51,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:51,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:48:51,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754070532] [2021-08-06 20:48:51,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:48:51,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:48:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:48:51,807 INFO L87 Difference]: Start difference. First operand 877 states and 1960 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) [2021-08-06 20:48:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:52,149 INFO L93 Difference]: Finished difference Result 2006 states and 4023 transitions. [2021-08-06 20:48:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:48:52,149 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 31 [2021-08-06 20:48:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:52,152 INFO L225 Difference]: With dead ends: 2006 [2021-08-06 20:48:52,152 INFO L226 Difference]: Without dead ends: 1998 [2021-08-06 20:48:52,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:48:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-08-06 20:48:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1251. [2021-08-06 20:48:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 2.2496) internal successors, (2812), 1250 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2812 transitions. [2021-08-06 20:48:52,169 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2812 transitions. Word has length 31 [2021-08-06 20:48:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:52,169 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 2812 transitions. [2021-08-06 20:48:52,169 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) [2021-08-06 20:48:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2812 transitions. [2021-08-06 20:48:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:48:52,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:52,172 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] [2021-08-06 20:48:52,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 20:48:52,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:52,387 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:52,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1906098834, now seen corresponding path program 31 times [2021-08-06 20:48:52,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:52,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856211688] [2021-08-06 20:48:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:52,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:52,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:52,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856211688] [2021-08-06 20:48:52,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856211688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:52,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606799107] [2021-08-06 20:48:52,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:48:52,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:52,455 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:52,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:48:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:56,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:48:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:48:56,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:56,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:48:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:48:56,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606799107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:56,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:48:56,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:48:56,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632966180] [2021-08-06 20:48:56,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:48:56,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:48:56,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:48:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:48:56,605 INFO L87 Difference]: Start difference. First operand 1251 states and 2812 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:48:57,272 INFO L93 Difference]: Finished difference Result 2915 states and 6140 transitions. [2021-08-06 20:48:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:48:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:48:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:48:57,276 INFO L225 Difference]: With dead ends: 2915 [2021-08-06 20:48:57,277 INFO L226 Difference]: Without dead ends: 2915 [2021-08-06 20:48:57,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:48:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-08-06 20:48:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2010. [2021-08-06 20:48:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 2.2936784469885514) internal successors, (4608), 2009 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 4608 transitions. [2021-08-06 20:48:57,303 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 4608 transitions. Word has length 31 [2021-08-06 20:48:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:48:57,304 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 4608 transitions. [2021-08-06 20:48:57,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:48:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 4608 transitions. [2021-08-06 20:48:57,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:48:57,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:48:57,306 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:48:57,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 20:48:57,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:57,507 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:48:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:48:57,507 INFO L82 PathProgramCache]: Analyzing trace with hash 942111990, now seen corresponding path program 28 times [2021-08-06 20:48:57,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:48:57,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900353672] [2021-08-06 20:48:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:48:57,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:48:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:48:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:48:57,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:48:57,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900353672] [2021-08-06 20:48:57,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900353672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:48:57,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239890335] [2021-08-06 20:48:57,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:48:57,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:48:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:48:57,584 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:48:57,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 20:49:01,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:49:01,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:01,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:49:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:01,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239890335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:01,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:01,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:49:01,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628470208] [2021-08-06 20:49:01,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:49:01,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:01,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:49:01,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:49:01,723 INFO L87 Difference]: Start difference. First operand 2010 states and 4608 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) [2021-08-06 20:49:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:02,024 INFO L93 Difference]: Finished difference Result 2825 states and 6052 transitions. [2021-08-06 20:49:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:49:02,024 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 31 [2021-08-06 20:49:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:02,028 INFO L225 Difference]: With dead ends: 2825 [2021-08-06 20:49:02,028 INFO L226 Difference]: Without dead ends: 2807 [2021-08-06 20:49:02,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:49:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-08-06 20:49:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2180. [2021-08-06 20:49:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 2.2882055988985774) internal successors, (4986), 2179 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 4986 transitions. [2021-08-06 20:49:02,056 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 4986 transitions. Word has length 31 [2021-08-06 20:49:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:02,057 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 4986 transitions. [2021-08-06 20:49:02,057 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) [2021-08-06 20:49:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 4986 transitions. [2021-08-06 20:49:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:02,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:02,059 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] [2021-08-06 20:49:02,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 20:49:02,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-06 20:49:02,260 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:02,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1898931442, now seen corresponding path program 32 times [2021-08-06 20:49:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:02,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056426144] [2021-08-06 20:49:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:02,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:49:02,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:02,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056426144] [2021-08-06 20:49:02,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056426144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:02,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084633175] [2021-08-06 20:49:02,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:49:02,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:02,322 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:02,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 20:49:06,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:49:06,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:06,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:06,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:06,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:49:06,463 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:49:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:06,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084633175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:06,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:06,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:49:06,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138906859] [2021-08-06 20:49:06,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:49:06,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:06,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:49:06,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:49:06,500 INFO L87 Difference]: Start difference. First operand 2180 states and 4986 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:49:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:07,105 INFO L93 Difference]: Finished difference Result 2857 states and 6040 transitions. [2021-08-06 20:49:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:49:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) 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 31 [2021-08-06 20:49:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:07,108 INFO L225 Difference]: With dead ends: 2857 [2021-08-06 20:49:07,108 INFO L226 Difference]: Without dead ends: 2845 [2021-08-06 20:49:07,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=457, Invalid=1349, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:49:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-08-06 20:49:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2190. [2021-08-06 20:49:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 2.2868889904065783) internal successors, (5006), 2189 states have internal predecessors, (5006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 5006 transitions. [2021-08-06 20:49:07,144 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 5006 transitions. Word has length 31 [2021-08-06 20:49:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:07,144 INFO L470 AbstractCegarLoop]: Abstraction has 2190 states and 5006 transitions. [2021-08-06 20:49:07,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:49:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 5006 transitions. [2021-08-06 20:49:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:07,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:07,147 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] [2021-08-06 20:49:07,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 20:49:07,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:07,348 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:07,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1399468690, now seen corresponding path program 33 times [2021-08-06 20:49:07,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:07,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893377620] [2021-08-06 20:49:07,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:07,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:49:07,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:07,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893377620] [2021-08-06 20:49:07,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893377620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:07,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016978118] [2021-08-06 20:49:07,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:49:07,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:07,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:07,416 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:07,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 20:49:11,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:49:11,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:11,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:11,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:11,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016978118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:11,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:11,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:49:11,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490626371] [2021-08-06 20:49:11,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:49:11,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:49:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:49:11,622 INFO L87 Difference]: Start difference. First operand 2190 states and 5006 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:12,151 INFO L93 Difference]: Finished difference Result 2868 states and 6013 transitions. [2021-08-06 20:49:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:49:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:49:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:12,155 INFO L225 Difference]: With dead ends: 2868 [2021-08-06 20:49:12,155 INFO L226 Difference]: Without dead ends: 2864 [2021-08-06 20:49:12,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=427, Invalid=1213, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:49:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-08-06 20:49:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2164. [2021-08-06 20:49:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 2.295885344429034) internal successors, (4966), 2163 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 4966 transitions. [2021-08-06 20:49:12,183 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 4966 transitions. Word has length 31 [2021-08-06 20:49:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:12,183 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 4966 transitions. [2021-08-06 20:49:12,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 4966 transitions. [2021-08-06 20:49:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:12,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:12,186 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] [2021-08-06 20:49:12,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:12,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:12,387 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2015543826, now seen corresponding path program 34 times [2021-08-06 20:49:12,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:12,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450939188] [2021-08-06 20:49:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:12,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:12,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:12,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450939188] [2021-08-06 20:49:12,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450939188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:12,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140520464] [2021-08-06 20:49:12,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:49:12,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:12,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:12,460 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:12,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 20:49:16,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:49:16,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:16,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:16,591 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:49:16,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:49:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:16,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140520464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:16,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:16,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:49:16,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488739159] [2021-08-06 20:49:16,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:49:16,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:49:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:49:16,629 INFO L87 Difference]: Start difference. First operand 2164 states and 4966 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:49:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:17,056 INFO L93 Difference]: Finished difference Result 2964 states and 6426 transitions. [2021-08-06 20:49:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:49:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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 31 [2021-08-06 20:49:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:17,060 INFO L225 Difference]: With dead ends: 2964 [2021-08-06 20:49:17,060 INFO L226 Difference]: Without dead ends: 2954 [2021-08-06 20:49:17,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 293.2ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:49:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-08-06 20:49:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2264. [2021-08-06 20:49:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 2.3155103844454263) internal successors, (5240), 2263 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 5240 transitions. [2021-08-06 20:49:17,087 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 5240 transitions. Word has length 31 [2021-08-06 20:49:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:17,087 INFO L470 AbstractCegarLoop]: Abstraction has 2264 states and 5240 transitions. [2021-08-06 20:49:17,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:49:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 5240 transitions. [2021-08-06 20:49:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:17,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:17,090 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] [2021-08-06 20:49:17,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 20:49:17,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-06 20:49:17,295 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:17,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:17,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2018581870, now seen corresponding path program 35 times [2021-08-06 20:49:17,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:17,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139222149] [2021-08-06 20:49:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:17,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:17,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:17,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139222149] [2021-08-06 20:49:17,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139222149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:17,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455429776] [2021-08-06 20:49:17,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:49:17,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:17,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:17,356 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:17,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 20:49:21,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:49:21,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:21,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:21,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:21,512 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:21,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455429776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:21,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:21,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:49:21,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967435573] [2021-08-06 20:49:21,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:49:21,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:49:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:49:21,548 INFO L87 Difference]: Start difference. First operand 2264 states and 5240 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-08-06 20:49:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:22,049 INFO L93 Difference]: Finished difference Result 3213 states and 6987 transitions. [2021-08-06 20:49:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:49:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 31 [2021-08-06 20:49:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:22,053 INFO L225 Difference]: With dead ends: 3213 [2021-08-06 20:49:22,053 INFO L226 Difference]: Without dead ends: 3213 [2021-08-06 20:49:22,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:49:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-08-06 20:49:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 2281. [2021-08-06 20:49:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2280 states have (on average 2.3346491228070176) internal successors, (5323), 2280 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 5323 transitions. [2021-08-06 20:49:22,100 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 5323 transitions. Word has length 31 [2021-08-06 20:49:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:22,100 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 5323 transitions. [2021-08-06 20:49:22,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-08-06 20:49:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 5323 transitions. [2021-08-06 20:49:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:22,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:22,103 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] [2021-08-06 20:49:22,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 20:49:22,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:22,304 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:22,304 INFO L82 PathProgramCache]: Analyzing trace with hash 526577138, now seen corresponding path program 36 times [2021-08-06 20:49:22,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:22,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435601027] [2021-08-06 20:49:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:22,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:22,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:22,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435601027] [2021-08-06 20:49:22,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435601027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:22,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292144867] [2021-08-06 20:49:22,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:49:22,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:22,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:22,375 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:22,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 20:49:26,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:49:26,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:26,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:26,561 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:26,562 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:26,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292144867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:26,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:26,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:49:26,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423670788] [2021-08-06 20:49:26,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:49:26,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:49:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:49:26,602 INFO L87 Difference]: Start difference. First operand 2281 states and 5323 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-08-06 20:49:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:26,996 INFO L93 Difference]: Finished difference Result 2951 states and 6405 transitions. [2021-08-06 20:49:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:49:26,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 31 [2021-08-06 20:49:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:27,001 INFO L225 Difference]: With dead ends: 2951 [2021-08-06 20:49:27,001 INFO L226 Difference]: Without dead ends: 2945 [2021-08-06 20:49:27,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=283, Invalid=773, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:49:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-08-06 20:49:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2281. [2021-08-06 20:49:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2280 states have (on average 2.3333333333333335) internal successors, (5320), 2280 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 5320 transitions. [2021-08-06 20:49:27,033 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 5320 transitions. Word has length 31 [2021-08-06 20:49:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:27,033 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 5320 transitions. [2021-08-06 20:49:27,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-08-06 20:49:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 5320 transitions. [2021-08-06 20:49:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:27,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:27,036 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] [2021-08-06 20:49:27,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 20:49:27,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:27,237 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1619104274, now seen corresponding path program 37 times [2021-08-06 20:49:27,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:27,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52632618] [2021-08-06 20:49:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:27,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:27,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:27,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52632618] [2021-08-06 20:49:27,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52632618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:27,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517991434] [2021-08-06 20:49:27,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:49:27,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:27,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:27,339 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:27,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 20:49:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:31,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:31,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:31,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:31,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517991434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:31,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:31,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:49:31,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813694349] [2021-08-06 20:49:31,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:49:31,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:49:31,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:49:31,661 INFO L87 Difference]: Start difference. First operand 2281 states and 5320 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:32,208 INFO L93 Difference]: Finished difference Result 3209 states and 7017 transitions. [2021-08-06 20:49:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:49:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:49:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:32,213 INFO L225 Difference]: With dead ends: 3209 [2021-08-06 20:49:32,213 INFO L226 Difference]: Without dead ends: 3209 [2021-08-06 20:49:32,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:49:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3209 states. [2021-08-06 20:49:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3209 to 2343. [2021-08-06 20:49:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.352263023057216) internal successors, (5509), 2342 states have internal predecessors, (5509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 5509 transitions. [2021-08-06 20:49:32,244 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 5509 transitions. Word has length 31 [2021-08-06 20:49:32,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:32,244 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 5509 transitions. [2021-08-06 20:49:32,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 5509 transitions. [2021-08-06 20:49:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:32,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:32,247 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:32,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 20:49:32,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:32,448 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1763011450, now seen corresponding path program 29 times [2021-08-06 20:49:32,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:32,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336370421] [2021-08-06 20:49:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:32,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:32,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:32,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336370421] [2021-08-06 20:49:32,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336370421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:32,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035148565] [2021-08-06 20:49:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:49:32,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:32,541 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:32,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 20:49:36,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:49:36,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:49:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:36,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035148565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:36,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:36,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:49:36,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807185738] [2021-08-06 20:49:36,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:49:36,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:49:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:49:36,836 INFO L87 Difference]: Start difference. First operand 2343 states and 5509 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) [2021-08-06 20:49:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:37,158 INFO L93 Difference]: Finished difference Result 3174 states and 7009 transitions. [2021-08-06 20:49:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:49:37,158 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 31 [2021-08-06 20:49:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:37,162 INFO L225 Difference]: With dead ends: 3174 [2021-08-06 20:49:37,162 INFO L226 Difference]: Without dead ends: 3164 [2021-08-06 20:49:37,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:49:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-08-06 20:49:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 2666. [2021-08-06 20:49:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.348217636022514) internal successors, (6258), 2665 states have internal predecessors, (6258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 6258 transitions. [2021-08-06 20:49:37,194 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 6258 transitions. Word has length 31 [2021-08-06 20:49:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:37,194 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 6258 transitions. [2021-08-06 20:49:37,194 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) [2021-08-06 20:49:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 6258 transitions. [2021-08-06 20:49:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:37,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:37,198 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] [2021-08-06 20:49:37,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 20:49:37,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-06 20:49:37,399 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1575136394, now seen corresponding path program 38 times [2021-08-06 20:49:37,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:37,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161571868] [2021-08-06 20:49:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:37,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:37,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:37,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161571868] [2021-08-06 20:49:37,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161571868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:37,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973316271] [2021-08-06 20:49:37,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:49:37,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:37,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:37,474 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:37,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 20:49:41,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:49:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:41,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:41,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:49:41,735 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:49:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:41,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973316271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:41,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:41,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:49:41,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784228824] [2021-08-06 20:49:41,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:49:41,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:49:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:49:41,772 INFO L87 Difference]: Start difference. First operand 2666 states and 6258 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:42,245 INFO L93 Difference]: Finished difference Result 3349 states and 7347 transitions. [2021-08-06 20:49:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:49:42,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:49:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:42,250 INFO L225 Difference]: With dead ends: 3349 [2021-08-06 20:49:42,250 INFO L226 Difference]: Without dead ends: 3339 [2021-08-06 20:49:42,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=382, Invalid=950, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:49:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-08-06 20:49:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2700. [2021-08-06 20:49:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2700 states, 2699 states have (on average 2.3467951092997406) internal successors, (6334), 2699 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2700 states to 2700 states and 6334 transitions. [2021-08-06 20:49:42,287 INFO L78 Accepts]: Start accepts. Automaton has 2700 states and 6334 transitions. Word has length 31 [2021-08-06 20:49:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:42,287 INFO L470 AbstractCegarLoop]: Abstraction has 2700 states and 6334 transitions. [2021-08-06 20:49:42,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2700 states and 6334 transitions. [2021-08-06 20:49:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:42,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:42,291 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] [2021-08-06 20:49:42,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 20:49:42,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:42,492 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:42,492 INFO L82 PathProgramCache]: Analyzing trace with hash -578569230, now seen corresponding path program 39 times [2021-08-06 20:49:42,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:42,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961287949] [2021-08-06 20:49:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:42,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:42,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:42,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961287949] [2021-08-06 20:49:42,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961287949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:42,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130039585] [2021-08-06 20:49:42,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:49:42,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:42,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:42,562 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:42,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 20:49:46,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:49:46,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:46,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:46,929 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:46,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:46,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130039585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:46,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:46,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:49:46,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989906717] [2021-08-06 20:49:46,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:49:46,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:49:46,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:49:46,968 INFO L87 Difference]: Start difference. First operand 2700 states and 6334 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:47,379 INFO L93 Difference]: Finished difference Result 3283 states and 7224 transitions. [2021-08-06 20:49:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:49:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:49:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:47,383 INFO L225 Difference]: With dead ends: 3283 [2021-08-06 20:49:47,383 INFO L226 Difference]: Without dead ends: 3279 [2021-08-06 20:49:47,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=312, Invalid=744, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:49:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-08-06 20:49:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2678. [2021-08-06 20:49:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.345162495330594) internal successors, (6278), 2677 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 6278 transitions. [2021-08-06 20:49:47,425 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 6278 transitions. Word has length 31 [2021-08-06 20:49:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:47,425 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 6278 transitions. [2021-08-06 20:49:47,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 6278 transitions. [2021-08-06 20:49:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:47,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:47,430 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] [2021-08-06 20:49:47,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:47,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:47,633 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:47,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1194644366, now seen corresponding path program 40 times [2021-08-06 20:49:47,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:47,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017853861] [2021-08-06 20:49:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:47,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:47,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017853861] [2021-08-06 20:49:47,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017853861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030826043] [2021-08-06 20:49:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:49:47,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:47,747 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:47,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 20:49:51,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:49:51,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:51,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:51,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:51,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:49:51,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:49:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030826043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:52,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:52,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:49:52,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564969466] [2021-08-06 20:49:52,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:49:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:49:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:49:52,010 INFO L87 Difference]: Start difference. First operand 2678 states and 6278 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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) [2021-08-06 20:49:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:52,373 INFO L93 Difference]: Finished difference Result 3156 states and 7037 transitions. [2021-08-06 20:49:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:49:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 31 [2021-08-06 20:49:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:52,377 INFO L225 Difference]: With dead ends: 3156 [2021-08-06 20:49:52,377 INFO L226 Difference]: Without dead ends: 3148 [2021-08-06 20:49:52,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:49:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3148 states. [2021-08-06 20:49:52,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3148 to 2668. [2021-08-06 20:49:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 2.3468316460442447) internal successors, (6259), 2667 states have internal predecessors, (6259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 6259 transitions. [2021-08-06 20:49:52,411 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 6259 transitions. Word has length 31 [2021-08-06 20:49:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:52,412 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 6259 transitions. [2021-08-06 20:49:52,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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) [2021-08-06 20:49:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 6259 transitions. [2021-08-06 20:49:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:52,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:52,415 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] [2021-08-06 20:49:52,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:52,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-06 20:49:52,615 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:52,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:52,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1525481522, now seen corresponding path program 41 times [2021-08-06 20:49:52,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:52,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462384617] [2021-08-06 20:49:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:52,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:52,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462384617] [2021-08-06 20:49:52,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462384617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839617367] [2021-08-06 20:49:52,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:49:52,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:52,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:52,701 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:52,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 20:49:56,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:49:56,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:49:56,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:49:56,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:49:56,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:56,962 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:49:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:56,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839617367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:56,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:49:56,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:49:56,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297390737] [2021-08-06 20:49:56,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:49:56,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:49:56,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:49:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:49:56,999 INFO L87 Difference]: Start difference. First operand 2668 states and 6259 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:49:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:49:57,376 INFO L93 Difference]: Finished difference Result 3164 states and 7031 transitions. [2021-08-06 20:49:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:49:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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 31 [2021-08-06 20:49:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:49:57,380 INFO L225 Difference]: With dead ends: 3164 [2021-08-06 20:49:57,380 INFO L226 Difference]: Without dead ends: 3150 [2021-08-06 20:49:57,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:49:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-08-06 20:49:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2656. [2021-08-06 20:49:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.351035781544256) internal successors, (6242), 2655 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:49:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6242 transitions. [2021-08-06 20:49:57,415 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6242 transitions. Word has length 31 [2021-08-06 20:49:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:49:57,415 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 6242 transitions. [2021-08-06 20:49:57,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:49:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6242 transitions. [2021-08-06 20:49:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:49:57,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:49:57,418 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:49:57,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 20:49:57,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:57,619 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:49:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:49:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash -614025618, now seen corresponding path program 13 times [2021-08-06 20:49:57,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:49:57,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758313178] [2021-08-06 20:49:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:49:57,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:49:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:49:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:49:57,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:49:57,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758313178] [2021-08-06 20:49:57,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758313178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:49:57,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255879727] [2021-08-06 20:49:57,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:49:57,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:49:57,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:49:57,686 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:49:57,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 20:50:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:01,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:01,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:01,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:50:01,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:50:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:01,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255879727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:01,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:01,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:50:01,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792884053] [2021-08-06 20:50:01,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:50:01,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:50:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:50:01,985 INFO L87 Difference]: Start difference. First operand 2656 states and 6242 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:50:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:02,112 INFO L93 Difference]: Finished difference Result 2909 states and 6658 transitions. [2021-08-06 20:50:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:50:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 31 [2021-08-06 20:50:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:02,116 INFO L225 Difference]: With dead ends: 2909 [2021-08-06 20:50:02,116 INFO L226 Difference]: Without dead ends: 2899 [2021-08-06 20:50:02,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:50:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-08-06 20:50:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2658. [2021-08-06 20:50:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 2.3556642830259693) internal successors, (6259), 2657 states have internal predecessors, (6259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 6259 transitions. [2021-08-06 20:50:02,149 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 6259 transitions. Word has length 31 [2021-08-06 20:50:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:02,149 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 6259 transitions. [2021-08-06 20:50:02,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:50:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 6259 transitions. [2021-08-06 20:50:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:02,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:02,152 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] [2021-08-06 20:50:02,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 20:50:02,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:02,352 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1918212302, now seen corresponding path program 42 times [2021-08-06 20:50:02,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:02,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998064599] [2021-08-06 20:50:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:02,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:02,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:02,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998064599] [2021-08-06 20:50:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998064599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:02,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074705683] [2021-08-06 20:50:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:50:02,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:02,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:02,445 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:02,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 20:50:06,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:50:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:06,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:06,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:06,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:06,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074705683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:06,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:06,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:50:06,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702747380] [2021-08-06 20:50:06,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:50:06,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:50:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:50:06,855 INFO L87 Difference]: Start difference. First operand 2658 states and 6259 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:50:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:07,325 INFO L93 Difference]: Finished difference Result 3658 states and 8151 transitions. [2021-08-06 20:50:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:50:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 31 [2021-08-06 20:50:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:07,332 INFO L225 Difference]: With dead ends: 3658 [2021-08-06 20:50:07,332 INFO L226 Difference]: Without dead ends: 3658 [2021-08-06 20:50:07,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:50:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-08-06 20:50:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2741. [2021-08-06 20:50:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 2.383941605839416) internal successors, (6532), 2740 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6532 transitions. [2021-08-06 20:50:07,394 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6532 transitions. Word has length 31 [2021-08-06 20:50:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:07,394 INFO L470 AbstractCegarLoop]: Abstraction has 2741 states and 6532 transitions. [2021-08-06 20:50:07,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:50:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6532 transitions. [2021-08-06 20:50:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:07,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:07,398 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] [2021-08-06 20:50:07,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 20:50:07,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 20:50:07,625 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash 884750262, now seen corresponding path program 43 times [2021-08-06 20:50:07,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:07,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162776746] [2021-08-06 20:50:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:07,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:07,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:07,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162776746] [2021-08-06 20:50:07,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162776746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:07,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146027850] [2021-08-06 20:50:07,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:50:07,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:07,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:07,698 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:07,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 20:50:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:11,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:11,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:11,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:12,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146027850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:12,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:12,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:50:12,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265845049] [2021-08-06 20:50:12,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:50:12,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:50:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:50:12,037 INFO L87 Difference]: Start difference. First operand 2741 states and 6532 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:50:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:12,431 INFO L93 Difference]: Finished difference Result 3354 states and 7442 transitions. [2021-08-06 20:50:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:50:12,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 31 [2021-08-06 20:50:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:12,435 INFO L225 Difference]: With dead ends: 3354 [2021-08-06 20:50:12,435 INFO L226 Difference]: Without dead ends: 3350 [2021-08-06 20:50:12,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:50:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-08-06 20:50:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 2606. [2021-08-06 20:50:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 2.381957773512476) internal successors, (6205), 2605 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 6205 transitions. [2021-08-06 20:50:12,470 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 6205 transitions. Word has length 31 [2021-08-06 20:50:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:12,471 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 6205 transitions. [2021-08-06 20:50:12,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:50:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 6205 transitions. [2021-08-06 20:50:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:12,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:12,473 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] [2021-08-06 20:50:12,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:12,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:12,674 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:12,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1865977206, now seen corresponding path program 44 times [2021-08-06 20:50:12,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:12,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058822367] [2021-08-06 20:50:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:12,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:12,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:12,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058822367] [2021-08-06 20:50:12,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058822367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:12,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760941760] [2021-08-06 20:50:12,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:50:12,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:12,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:12,740 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:12,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 20:50:16,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:50:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:17,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:17,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:17,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760941760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:17,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:17,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:50:17,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401735890] [2021-08-06 20:50:17,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:50:17,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:17,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:50:17,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:50:17,057 INFO L87 Difference]: Start difference. First operand 2606 states and 6205 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:50:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:17,411 INFO L93 Difference]: Finished difference Result 3129 states and 7020 transitions. [2021-08-06 20:50:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:50:17,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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 31 [2021-08-06 20:50:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:17,415 INFO L225 Difference]: With dead ends: 3129 [2021-08-06 20:50:17,415 INFO L226 Difference]: Without dead ends: 3117 [2021-08-06 20:50:17,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:50:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-08-06 20:50:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2602. [2021-08-06 20:50:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 2.3813917723952325) internal successors, (6194), 2601 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 6194 transitions. [2021-08-06 20:50:17,463 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 6194 transitions. Word has length 31 [2021-08-06 20:50:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:17,463 INFO L470 AbstractCegarLoop]: Abstraction has 2602 states and 6194 transitions. [2021-08-06 20:50:17,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) 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) [2021-08-06 20:50:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 6194 transitions. [2021-08-06 20:50:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:17,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:17,468 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:17,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:17,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:17,681 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:17,681 INFO L82 PathProgramCache]: Analyzing trace with hash -695239058, now seen corresponding path program 14 times [2021-08-06 20:50:17,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:17,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437409283] [2021-08-06 20:50:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:17,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:17,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:17,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437409283] [2021-08-06 20:50:17,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437409283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:17,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473095478] [2021-08-06 20:50:17,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:50:17,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:17,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:17,741 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:17,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 20:50:21,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:50:21,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:21,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:22,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:22,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:22,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473095478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:22,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:22,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:50:22,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911155431] [2021-08-06 20:50:22,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:50:22,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:22,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:50:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:50:22,103 INFO L87 Difference]: Start difference. First operand 2602 states and 6194 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:50:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:22,206 INFO L93 Difference]: Finished difference Result 2859 states and 6632 transitions. [2021-08-06 20:50:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:50:22,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) 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 31 [2021-08-06 20:50:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:22,210 INFO L225 Difference]: With dead ends: 2859 [2021-08-06 20:50:22,210 INFO L226 Difference]: Without dead ends: 2859 [2021-08-06 20:50:22,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:50:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2021-08-06 20:50:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2564. [2021-08-06 20:50:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.3796332422941866) internal successors, (6099), 2563 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 6099 transitions. [2021-08-06 20:50:22,240 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 6099 transitions. Word has length 31 [2021-08-06 20:50:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:22,240 INFO L470 AbstractCegarLoop]: Abstraction has 2564 states and 6099 transitions. [2021-08-06 20:50:22,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:50:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 6099 transitions. [2021-08-06 20:50:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:22,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:22,243 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] [2021-08-06 20:50:22,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 20:50:22,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:22,444 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1472633290, now seen corresponding path program 45 times [2021-08-06 20:50:22,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:22,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010393985] [2021-08-06 20:50:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:22,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:22,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:22,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010393985] [2021-08-06 20:50:22,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010393985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:22,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549872673] [2021-08-06 20:50:22,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:50:22,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:22,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:22,517 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:22,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 20:50:26,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:50:26,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:26,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:26,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:26,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:26,819 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:26,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549872673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:26,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:26,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:50:26,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677118347] [2021-08-06 20:50:26,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:50:26,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:26,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:50:26,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:50:26,860 INFO L87 Difference]: Start difference. First operand 2564 states and 6099 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:50:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:27,132 INFO L93 Difference]: Finished difference Result 3529 states and 8090 transitions. [2021-08-06 20:50:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:50:27,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 31 [2021-08-06 20:50:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:27,137 INFO L225 Difference]: With dead ends: 3529 [2021-08-06 20:50:27,137 INFO L226 Difference]: Without dead ends: 3517 [2021-08-06 20:50:27,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:50:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2021-08-06 20:50:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 2917. [2021-08-06 20:50:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 2.3871742112482854) internal successors, (6961), 2916 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 6961 transitions. [2021-08-06 20:50:27,175 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 6961 transitions. Word has length 31 [2021-08-06 20:50:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:27,175 INFO L470 AbstractCegarLoop]: Abstraction has 2917 states and 6961 transitions. [2021-08-06 20:50:27,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:50:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 6961 transitions. [2021-08-06 20:50:27,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:27,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:27,179 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:27,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 20:50:27,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-06 20:50:27,379 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:27,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2018642546, now seen corresponding path program 15 times [2021-08-06 20:50:27,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:27,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132649907] [2021-08-06 20:50:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:27,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:27,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:27,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132649907] [2021-08-06 20:50:27,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132649907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:27,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025461534] [2021-08-06 20:50:27,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:50:27,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:27,455 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:27,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 20:50:31,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:50:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:31,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:50:31,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:31,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:31,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:50:31,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025461534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:31,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:31,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 20:50:31,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135916140] [2021-08-06 20:50:31,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:50:31,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:50:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:50:31,892 INFO L87 Difference]: Start difference. First operand 2917 states and 6961 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:32,399 INFO L93 Difference]: Finished difference Result 6858 states and 14744 transitions. [2021-08-06 20:50:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:50:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 31 [2021-08-06 20:50:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:32,409 INFO L225 Difference]: With dead ends: 6858 [2021-08-06 20:50:32,409 INFO L226 Difference]: Without dead ends: 6858 [2021-08-06 20:50:32,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=460, Invalid=1520, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:50:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2021-08-06 20:50:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 3544. [2021-08-06 20:50:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3543 states have (on average 2.4002257973468812) internal successors, (8504), 3543 states have internal predecessors, (8504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 8504 transitions. [2021-08-06 20:50:32,475 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 8504 transitions. Word has length 31 [2021-08-06 20:50:32,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:32,475 INFO L470 AbstractCegarLoop]: Abstraction has 3544 states and 8504 transitions. [2021-08-06 20:50:32,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:32,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 8504 transitions. [2021-08-06 20:50:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:32,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:32,479 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] [2021-08-06 20:50:32,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 20:50:32,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:32,679 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash -649916562, now seen corresponding path program 46 times [2021-08-06 20:50:32,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:32,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729245338] [2021-08-06 20:50:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:32,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:32,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:32,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729245338] [2021-08-06 20:50:32,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729245338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:32,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072374092] [2021-08-06 20:50:32,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:50:32,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:32,755 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:32,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 20:50:36,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:50:36,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:37,107 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:37,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:37,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072374092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:37,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:37,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 20:50:37,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130650290] [2021-08-06 20:50:37,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:50:37,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:50:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:50:37,144 INFO L87 Difference]: Start difference. First operand 3544 states and 8504 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:50:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:37,567 INFO L93 Difference]: Finished difference Result 5222 states and 12109 transitions. [2021-08-06 20:50:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:50:37,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 31 [2021-08-06 20:50:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:37,575 INFO L225 Difference]: With dead ends: 5222 [2021-08-06 20:50:37,575 INFO L226 Difference]: Without dead ends: 5222 [2021-08-06 20:50:37,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:50:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5222 states. [2021-08-06 20:50:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5222 to 4536. [2021-08-06 20:50:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 4535 states have (on average 2.4235942668136716) internal successors, (10991), 4535 states have internal predecessors, (10991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 10991 transitions. [2021-08-06 20:50:37,641 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 10991 transitions. Word has length 31 [2021-08-06 20:50:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:37,641 INFO L470 AbstractCegarLoop]: Abstraction has 4536 states and 10991 transitions. [2021-08-06 20:50:37,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:50:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 10991 transitions. [2021-08-06 20:50:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:37,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:37,647 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] [2021-08-06 20:50:37,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 20:50:37,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:37,848 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2141921294, now seen corresponding path program 47 times [2021-08-06 20:50:37,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:37,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771594327] [2021-08-06 20:50:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:37,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:37,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:37,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771594327] [2021-08-06 20:50:37,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771594327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:37,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851662138] [2021-08-06 20:50:37,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:50:37,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:37,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:37,916 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:37,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 20:50:42,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:50:42,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:42,270 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:42,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:42,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851662138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:42,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:42,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 20:50:42,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616999366] [2021-08-06 20:50:42,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:50:42,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:50:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:50:42,311 INFO L87 Difference]: Start difference. First operand 4536 states and 10991 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:50:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:42,667 INFO L93 Difference]: Finished difference Result 5001 states and 11578 transitions. [2021-08-06 20:50:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:50:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 31 [2021-08-06 20:50:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:42,674 INFO L225 Difference]: With dead ends: 5001 [2021-08-06 20:50:42,675 INFO L226 Difference]: Without dead ends: 4997 [2021-08-06 20:50:42,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=234, Invalid=696, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:50:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4997 states. [2021-08-06 20:50:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4997 to 3899. [2021-08-06 20:50:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 2.4281682914315033) internal successors, (9465), 3898 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 9465 transitions. [2021-08-06 20:50:42,733 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 9465 transitions. Word has length 31 [2021-08-06 20:50:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:42,733 INFO L470 AbstractCegarLoop]: Abstraction has 3899 states and 9465 transitions. [2021-08-06 20:50:42,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:50:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 9465 transitions. [2021-08-06 20:50:42,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:42,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:42,738 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:42,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 20:50:42,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:42,939 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1185101842, now seen corresponding path program 16 times [2021-08-06 20:50:42,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:42,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064640764] [2021-08-06 20:50:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:42,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:43,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:43,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064640764] [2021-08-06 20:50:43,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064640764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:43,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584618768] [2021-08-06 20:50:43,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:50:43,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:43,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:43,001 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:43,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 20:50:47,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:50:47,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:47,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:50:47,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:50:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:50:47,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584618768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:47,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:47,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:50:47,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785628263] [2021-08-06 20:50:47,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:50:47,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:50:47,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:50:47,394 INFO L87 Difference]: Start difference. First operand 3899 states and 9465 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:50:47,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:47,492 INFO L93 Difference]: Finished difference Result 4811 states and 11385 transitions. [2021-08-06 20:50:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:50:47,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) 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 31 [2021-08-06 20:50:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:47,499 INFO L225 Difference]: With dead ends: 4811 [2021-08-06 20:50:47,499 INFO L226 Difference]: Without dead ends: 4809 [2021-08-06 20:50:47,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:50:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4809 states. [2021-08-06 20:50:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4809 to 3931. [2021-08-06 20:50:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 2.427735368956743) internal successors, (9541), 3930 states have internal predecessors, (9541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 9541 transitions. [2021-08-06 20:50:47,578 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 9541 transitions. Word has length 31 [2021-08-06 20:50:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:47,579 INFO L470 AbstractCegarLoop]: Abstraction has 3931 states and 9541 transitions. [2021-08-06 20:50:47,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:50:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 9541 transitions. [2021-08-06 20:50:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:47,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:47,583 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:47,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 20:50:47,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:47,784 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash 7364590, now seen corresponding path program 17 times [2021-08-06 20:50:47,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:47,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790381056] [2021-08-06 20:50:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:47,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:50:47,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:47,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790381056] [2021-08-06 20:50:47,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790381056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:47,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330887730] [2021-08-06 20:50:47,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:50:47,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:47,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:47,865 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:47,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 20:50:52,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:50:52,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:52,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:52,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:52,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:50:52,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330887730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:52,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:52,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:50:52,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355408748] [2021-08-06 20:50:52,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:50:52,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:50:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:50:52,348 INFO L87 Difference]: Start difference. First operand 3931 states and 9541 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:50:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:52,463 INFO L93 Difference]: Finished difference Result 4797 states and 11358 transitions. [2021-08-06 20:50:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:50:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) 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 31 [2021-08-06 20:50:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:52,470 INFO L225 Difference]: With dead ends: 4797 [2021-08-06 20:50:52,470 INFO L226 Difference]: Without dead ends: 4797 [2021-08-06 20:50:52,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:50:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-08-06 20:50:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3923. [2021-08-06 20:50:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3922 states have (on average 2.4260581336053035) internal successors, (9515), 3922 states have internal predecessors, (9515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 9515 transitions. [2021-08-06 20:50:52,570 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 9515 transitions. Word has length 31 [2021-08-06 20:50:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:52,571 INFO L470 AbstractCegarLoop]: Abstraction has 3923 states and 9515 transitions. [2021-08-06 20:50:52,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:50:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 9515 transitions. [2021-08-06 20:50:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:52,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:52,577 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:50:52,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 20:50:52,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-06 20:50:52,805 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2000394414, now seen corresponding path program 18 times [2021-08-06 20:50:52,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:52,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137313321] [2021-08-06 20:50:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:52,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:52,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:52,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137313321] [2021-08-06 20:50:52,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137313321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:52,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425248087] [2021-08-06 20:50:52,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:50:52,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:52,873 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:52,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 20:50:57,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:50:57,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:50:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:50:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:50:57,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:57,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:50:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:50:57,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425248087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:57,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:50:57,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 20:50:57,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829829761] [2021-08-06 20:50:57,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:50:57,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:50:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:50:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:50:57,342 INFO L87 Difference]: Start difference. First operand 3923 states and 9515 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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) [2021-08-06 20:50:57,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:50:57,491 INFO L93 Difference]: Finished difference Result 4977 states and 11771 transitions. [2021-08-06 20:50:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:50:57,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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 31 [2021-08-06 20:50:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:50:57,498 INFO L225 Difference]: With dead ends: 4977 [2021-08-06 20:50:57,498 INFO L226 Difference]: Without dead ends: 4977 [2021-08-06 20:50:57,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:50:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2021-08-06 20:50:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4481. [2021-08-06 20:50:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 4480 states have (on average 2.4049107142857142) internal successors, (10774), 4480 states have internal predecessors, (10774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:50:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 10774 transitions. [2021-08-06 20:50:57,578 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 10774 transitions. Word has length 31 [2021-08-06 20:50:57,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:50:57,579 INFO L470 AbstractCegarLoop]: Abstraction has 4481 states and 10774 transitions. [2021-08-06 20:50:57,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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) [2021-08-06 20:50:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 10774 transitions. [2021-08-06 20:50:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:50:57,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:50:57,584 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] [2021-08-06 20:50:57,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 20:50:57,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 20:50:57,784 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:50:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:50:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1993204118, now seen corresponding path program 48 times [2021-08-06 20:50:57,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:50:57,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833418863] [2021-08-06 20:50:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:50:57,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:50:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:50:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:50:57,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:50:57,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833418863] [2021-08-06 20:50:57,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833418863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:50:57,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909694727] [2021-08-06 20:50:57,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:50:57,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:50:57,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:50:57,874 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:50:57,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 20:51:02,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:51:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:51:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:02,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:51:02,358 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:51:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:02,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909694727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:02,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:02,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:51:02,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860703959] [2021-08-06 20:51:02,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:51:02,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:51:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:51:02,395 INFO L87 Difference]: Start difference. First operand 4481 states and 10774 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:02,923 INFO L93 Difference]: Finished difference Result 5587 states and 12964 transitions. [2021-08-06 20:51:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:51:02,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:51:02,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:02,931 INFO L225 Difference]: With dead ends: 5587 [2021-08-06 20:51:02,931 INFO L226 Difference]: Without dead ends: 5581 [2021-08-06 20:51:02,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:51:02,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5581 states. [2021-08-06 20:51:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5581 to 5103. [2021-08-06 20:51:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5103 states, 5102 states have (on average 2.3961191689533514) internal successors, (12225), 5102 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5103 states to 5103 states and 12225 transitions. [2021-08-06 20:51:03,011 INFO L78 Accepts]: Start accepts. Automaton has 5103 states and 12225 transitions. Word has length 31 [2021-08-06 20:51:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:03,011 INFO L470 AbstractCegarLoop]: Abstraction has 5103 states and 12225 transitions. [2021-08-06 20:51:03,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 5103 states and 12225 transitions. [2021-08-06 20:51:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:03,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:03,019 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:03,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 20:51:03,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 20:51:03,245 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:03,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1241881938, now seen corresponding path program 30 times [2021-08-06 20:51:03,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:03,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809319653] [2021-08-06 20:51:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:03,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:03,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:03,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809319653] [2021-08-06 20:51:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809319653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:03,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325260793] [2021-08-06 20:51:03,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:51:03,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:03,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:03,314 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:03,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 20:51:07,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:51:07,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:07,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:51:07,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:07,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:07,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:07,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325260793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:07,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:07,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:51:07,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216915743] [2021-08-06 20:51:07,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:51:07,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:51:07,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:51:07,915 INFO L87 Difference]: Start difference. First operand 5103 states and 12225 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:08,871 INFO L93 Difference]: Finished difference Result 8119 states and 18253 transitions. [2021-08-06 20:51:08,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:51:08,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:51:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:08,885 INFO L225 Difference]: With dead ends: 8119 [2021-08-06 20:51:08,885 INFO L226 Difference]: Without dead ends: 8119 [2021-08-06 20:51:08,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=899, Invalid=3133, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:51:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8119 states. [2021-08-06 20:51:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8119 to 5190. [2021-08-06 20:51:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5190 states, 5189 states have (on average 2.3964154943148968) internal successors, (12435), 5189 states have internal predecessors, (12435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5190 states to 5190 states and 12435 transitions. [2021-08-06 20:51:08,993 INFO L78 Accepts]: Start accepts. Automaton has 5190 states and 12435 transitions. Word has length 31 [2021-08-06 20:51:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:08,993 INFO L470 AbstractCegarLoop]: Abstraction has 5190 states and 12435 transitions. [2021-08-06 20:51:08,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 5190 states and 12435 transitions. [2021-08-06 20:51:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:09,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:09,001 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:09,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 20:51:09,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:09,229 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash 688355050, now seen corresponding path program 31 times [2021-08-06 20:51:09,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:09,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157917615] [2021-08-06 20:51:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:09,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:09,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:09,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157917615] [2021-08-06 20:51:09,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157917615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:09,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620320668] [2021-08-06 20:51:09,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:51:09,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:09,317 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:09,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 20:51:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:51:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:13,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:13,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:13,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620320668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:13,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:13,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 20:51:13,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561858626] [2021-08-06 20:51:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:51:13,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:51:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:51:13,882 INFO L87 Difference]: Start difference. First operand 5190 states and 12435 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:14,454 INFO L93 Difference]: Finished difference Result 7478 states and 16993 transitions. [2021-08-06 20:51:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:51:14,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 31 [2021-08-06 20:51:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:14,465 INFO L225 Difference]: With dead ends: 7478 [2021-08-06 20:51:14,465 INFO L226 Difference]: Without dead ends: 7478 [2021-08-06 20:51:14,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 406.7ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:51:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-08-06 20:51:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5188. [2021-08-06 20:51:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5187 states have (on average 2.396182764603817) internal successors, (12429), 5187 states have internal predecessors, (12429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 12429 transitions. [2021-08-06 20:51:14,548 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 12429 transitions. Word has length 31 [2021-08-06 20:51:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:14,549 INFO L470 AbstractCegarLoop]: Abstraction has 5188 states and 12429 transitions. [2021-08-06 20:51:14,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 12429 transitions. [2021-08-06 20:51:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:14,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:14,556 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] [2021-08-06 20:51:14,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 20:51:14,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 20:51:14,777 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1870624054, now seen corresponding path program 49 times [2021-08-06 20:51:14,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:14,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397804747] [2021-08-06 20:51:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:14,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:14,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:14,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397804747] [2021-08-06 20:51:14,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397804747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:14,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791456321] [2021-08-06 20:51:14,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:51:14,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:14,844 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:14,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 20:51:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:19,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:51:19,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:19,259 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:19,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:19,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791456321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:19,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:19,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 20:51:19,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571826579] [2021-08-06 20:51:19,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:51:19,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:19,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:51:19,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:51:19,296 INFO L87 Difference]: Start difference. First operand 5188 states and 12429 transitions. Second operand has 12 states, 12 states have (on average 3.75) 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) [2021-08-06 20:51:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:19,683 INFO L93 Difference]: Finished difference Result 6200 states and 14398 transitions. [2021-08-06 20:51:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:51:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) 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 31 [2021-08-06 20:51:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:19,692 INFO L225 Difference]: With dead ends: 6200 [2021-08-06 20:51:19,692 INFO L226 Difference]: Without dead ends: 6200 [2021-08-06 20:51:19,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:51:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2021-08-06 20:51:19,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 5420. [2021-08-06 20:51:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5420 states, 5419 states have (on average 2.388817124930799) internal successors, (12945), 5419 states have internal predecessors, (12945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5420 states to 5420 states and 12945 transitions. [2021-08-06 20:51:19,764 INFO L78 Accepts]: Start accepts. Automaton has 5420 states and 12945 transitions. Word has length 31 [2021-08-06 20:51:19,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:19,764 INFO L470 AbstractCegarLoop]: Abstraction has 5420 states and 12945 transitions. [2021-08-06 20:51:19,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) 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) [2021-08-06 20:51:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5420 states and 12945 transitions. [2021-08-06 20:51:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:19,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:19,770 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:19,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 20:51:19,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 20:51:19,971 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:19,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:19,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1052836146, now seen corresponding path program 50 times [2021-08-06 20:51:19,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:19,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907723776] [2021-08-06 20:51:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:19,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:20,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:20,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907723776] [2021-08-06 20:51:20,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907723776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:20,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739255615] [2021-08-06 20:51:20,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:51:20,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:20,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:20,044 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:20,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 20:51:24,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:51:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:51:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:24,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:24,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:51:24,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739255615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:24,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:24,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 20:51:24,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257369367] [2021-08-06 20:51:24,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:51:24,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:51:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:51:24,642 INFO L87 Difference]: Start difference. First operand 5420 states and 12945 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:25,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:25,403 INFO L93 Difference]: Finished difference Result 9199 states and 19682 transitions. [2021-08-06 20:51:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:51:25,403 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 31 [2021-08-06 20:51:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:25,418 INFO L225 Difference]: With dead ends: 9199 [2021-08-06 20:51:25,418 INFO L226 Difference]: Without dead ends: 9199 [2021-08-06 20:51:25,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:51:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-08-06 20:51:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 5387. [2021-08-06 20:51:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 5386 states have (on average 2.381359079093947) internal successors, (12826), 5386 states have internal predecessors, (12826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 12826 transitions. [2021-08-06 20:51:25,515 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 12826 transitions. Word has length 31 [2021-08-06 20:51:25,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:25,516 INFO L470 AbstractCegarLoop]: Abstraction has 5387 states and 12826 transitions. [2021-08-06 20:51:25,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 12826 transitions. [2021-08-06 20:51:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:25,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:25,522 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:51:25,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 20:51:25,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:25,722 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1669746382, now seen corresponding path program 51 times [2021-08-06 20:51:25,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:25,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391347993] [2021-08-06 20:51:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:25,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:25,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:25,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391347993] [2021-08-06 20:51:25,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391347993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:25,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427386238] [2021-08-06 20:51:25,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:51:25,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:25,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:25,795 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:25,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 20:51:30,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:51:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:30,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:51:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:30,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:30,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:51:30,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427386238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:30,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:30,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 20:51:30,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168370953] [2021-08-06 20:51:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:51:30,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:51:30,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:51:30,302 INFO L87 Difference]: Start difference. First operand 5387 states and 12826 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) 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) [2021-08-06 20:51:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:30,747 INFO L93 Difference]: Finished difference Result 8586 states and 18491 transitions. [2021-08-06 20:51:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:51:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) 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 31 [2021-08-06 20:51:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:30,761 INFO L225 Difference]: With dead ends: 8586 [2021-08-06 20:51:30,761 INFO L226 Difference]: Without dead ends: 8586 [2021-08-06 20:51:30,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:51:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8586 states. [2021-08-06 20:51:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8586 to 5361. [2021-08-06 20:51:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5361 states, 5360 states have (on average 2.3794776119402985) internal successors, (12754), 5360 states have internal predecessors, (12754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5361 states to 5361 states and 12754 transitions. [2021-08-06 20:51:30,853 INFO L78 Accepts]: Start accepts. Automaton has 5361 states and 12754 transitions. Word has length 31 [2021-08-06 20:51:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:30,853 INFO L470 AbstractCegarLoop]: Abstraction has 5361 states and 12754 transitions. [2021-08-06 20:51:30,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) 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) [2021-08-06 20:51:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5361 states and 12754 transitions. [2021-08-06 20:51:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:30,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:30,859 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] [2021-08-06 20:51:30,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 20:51:31,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:31,061 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -828995662, now seen corresponding path program 52 times [2021-08-06 20:51:31,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:31,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716043569] [2021-08-06 20:51:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:31,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:51:31,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:31,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716043569] [2021-08-06 20:51:31,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716043569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:31,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106795762] [2021-08-06 20:51:31,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:51:31,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:31,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:31,138 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:31,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 20:51:35,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:51:35,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:35,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:51:35,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:35,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:35,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:51:35,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106795762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:35,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:35,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:51:35,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984333675] [2021-08-06 20:51:35,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:51:35,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:35,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:51:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:51:35,597 INFO L87 Difference]: Start difference. First operand 5361 states and 12754 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:35,742 INFO L93 Difference]: Finished difference Result 7301 states and 16929 transitions. [2021-08-06 20:51:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:51:35,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:51:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:35,752 INFO L225 Difference]: With dead ends: 7301 [2021-08-06 20:51:35,752 INFO L226 Difference]: Without dead ends: 7299 [2021-08-06 20:51:35,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:51:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7299 states. [2021-08-06 20:51:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7299 to 6609. [2021-08-06 20:51:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6609 states, 6608 states have (on average 2.37863196125908) internal successors, (15718), 6608 states have internal predecessors, (15718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 15718 transitions. [2021-08-06 20:51:35,840 INFO L78 Accepts]: Start accepts. Automaton has 6609 states and 15718 transitions. Word has length 31 [2021-08-06 20:51:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:35,841 INFO L470 AbstractCegarLoop]: Abstraction has 6609 states and 15718 transitions. [2021-08-06 20:51:35,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6609 states and 15718 transitions. [2021-08-06 20:51:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:35,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:35,848 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] [2021-08-06 20:51:35,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 20:51:36,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 20:51:36,048 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash 127823790, now seen corresponding path program 53 times [2021-08-06 20:51:36,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:36,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208947389] [2021-08-06 20:51:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:36,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:36,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:36,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208947389] [2021-08-06 20:51:36,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208947389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:36,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716792733] [2021-08-06 20:51:36,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:51:36,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:36,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:36,120 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:36,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 20:51:40,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:51:40,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:51:40,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:40,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:51:40,754 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:51:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:51:40,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716792733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:40,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:40,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 20:51:40,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271624472] [2021-08-06 20:51:40,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:51:40,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:40,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:51:40,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:51:40,791 INFO L87 Difference]: Start difference. First operand 6609 states and 15718 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:51:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:41,333 INFO L93 Difference]: Finished difference Result 8346 states and 18869 transitions. [2021-08-06 20:51:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:51:41,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) 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 31 [2021-08-06 20:51:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:41,351 INFO L225 Difference]: With dead ends: 8346 [2021-08-06 20:51:41,351 INFO L226 Difference]: Without dead ends: 8340 [2021-08-06 20:51:41,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:51:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-08-06 20:51:41,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 6749. [2021-08-06 20:51:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 2.3906342620035566) internal successors, (16132), 6748 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 16132 transitions. [2021-08-06 20:51:41,477 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 16132 transitions. Word has length 31 [2021-08-06 20:51:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:41,477 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 16132 transitions. [2021-08-06 20:51:41,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:51:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 16132 transitions. [2021-08-06 20:51:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:41,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:41,485 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] [2021-08-06 20:51:41,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 20:51:41,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:41,686 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1320290222, now seen corresponding path program 54 times [2021-08-06 20:51:41,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:41,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882804582] [2021-08-06 20:51:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:41,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:41,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:41,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882804582] [2021-08-06 20:51:41,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882804582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:41,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135432636] [2021-08-06 20:51:41,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:51:41,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:41,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:41,761 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:41,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 20:51:46,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:51:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:46,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:51:46,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:46,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:46,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:51:46,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135432636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:46,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:46,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 20:51:46,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893145151] [2021-08-06 20:51:46,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:51:46,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:46,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:51:46,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:51:46,371 INFO L87 Difference]: Start difference. First operand 6749 states and 16132 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:51:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:47,070 INFO L93 Difference]: Finished difference Result 8184 states and 18400 transitions. [2021-08-06 20:51:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:51:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) 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 31 [2021-08-06 20:51:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:47,084 INFO L225 Difference]: With dead ends: 8184 [2021-08-06 20:51:47,084 INFO L226 Difference]: Without dead ends: 8184 [2021-08-06 20:51:47,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1319, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:51:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-08-06 20:51:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 6393. [2021-08-06 20:51:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6392 states have (on average 2.381727158948686) internal successors, (15224), 6392 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 15224 transitions. [2021-08-06 20:51:47,184 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 15224 transitions. Word has length 31 [2021-08-06 20:51:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:47,184 INFO L470 AbstractCegarLoop]: Abstraction has 6393 states and 15224 transitions. [2021-08-06 20:51:47,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:51:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 15224 transitions. [2021-08-06 20:51:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:47,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:47,191 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] [2021-08-06 20:51:47,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 20:51:47,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:47,392 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:47,392 INFO L82 PathProgramCache]: Analyzing trace with hash -126466250, now seen corresponding path program 55 times [2021-08-06 20:51:47,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:47,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653042331] [2021-08-06 20:51:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:47,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:47,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:47,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653042331] [2021-08-06 20:51:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653042331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:47,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656007341] [2021-08-06 20:51:47,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:51:47,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:47,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:47,471 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:47,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 20:51:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:51:51,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:51,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:51,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:51:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:52,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656007341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:52,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:52,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:51:52,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659234433] [2021-08-06 20:51:52,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:51:52,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:51:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:51:52,027 INFO L87 Difference]: Start difference. First operand 6393 states and 15224 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:52,160 INFO L93 Difference]: Finished difference Result 6654 states and 15568 transitions. [2021-08-06 20:51:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:51:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:51:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:52,170 INFO L225 Difference]: With dead ends: 6654 [2021-08-06 20:51:52,171 INFO L226 Difference]: Without dead ends: 6648 [2021-08-06 20:51:52,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:51:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6648 states. [2021-08-06 20:51:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6648 to 6201. [2021-08-06 20:51:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6201 states, 6200 states have (on average 2.3809677419354838) internal successors, (14762), 6200 states have internal predecessors, (14762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6201 states to 6201 states and 14762 transitions. [2021-08-06 20:51:52,259 INFO L78 Accepts]: Start accepts. Automaton has 6201 states and 14762 transitions. Word has length 31 [2021-08-06 20:51:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:52,259 INFO L470 AbstractCegarLoop]: Abstraction has 6201 states and 14762 transitions. [2021-08-06 20:51:52,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6201 states and 14762 transitions. [2021-08-06 20:51:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:52,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:52,265 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] [2021-08-06 20:51:52,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 20:51:52,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-08-06 20:51:52,466 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:52,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:52,466 INFO L82 PathProgramCache]: Analyzing trace with hash 830353202, now seen corresponding path program 56 times [2021-08-06 20:51:52,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:52,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166700002] [2021-08-06 20:51:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:52,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:52,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:52,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166700002] [2021-08-06 20:51:52,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166700002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:52,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101798399] [2021-08-06 20:51:52,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:51:52,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:52,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:52,539 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:52,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 20:51:56,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:51:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:51:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:51:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:51:57,190 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:51:57,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:51:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:51:57,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101798399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:57,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:51:57,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 20:51:57,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620842036] [2021-08-06 20:51:57,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:51:57,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:51:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:51:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:51:57,227 INFO L87 Difference]: Start difference. First operand 6201 states and 14762 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:51:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:51:57,691 INFO L93 Difference]: Finished difference Result 7095 states and 15999 transitions. [2021-08-06 20:51:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:51:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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 31 [2021-08-06 20:51:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:51:57,702 INFO L225 Difference]: With dead ends: 7095 [2021-08-06 20:51:57,702 INFO L226 Difference]: Without dead ends: 7091 [2021-08-06 20:51:57,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:51:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7091 states. [2021-08-06 20:51:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7091 to 6215. [2021-08-06 20:51:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6215 states, 6214 states have (on average 2.382684261345349) internal successors, (14806), 6214 states have internal predecessors, (14806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:51:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6215 states to 6215 states and 14806 transitions. [2021-08-06 20:51:57,794 INFO L78 Accepts]: Start accepts. Automaton has 6215 states and 14806 transitions. Word has length 31 [2021-08-06 20:51:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:51:57,794 INFO L470 AbstractCegarLoop]: Abstraction has 6215 states and 14806 transitions. [2021-08-06 20:51:57,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:51:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 6215 states and 14806 transitions. [2021-08-06 20:51:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:51:57,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:51:57,803 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] [2021-08-06 20:51:57,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 20:51:58,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:58,005 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:51:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:51:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash -722762894, now seen corresponding path program 57 times [2021-08-06 20:51:58,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:51:58,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116304145] [2021-08-06 20:51:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:51:58,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:51:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:51:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:51:58,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:51:58,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116304145] [2021-08-06 20:51:58,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116304145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:51:58,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418019693] [2021-08-06 20:51:58,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:51:58,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:51:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:51:58,076 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:51:58,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 20:52:02,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:52:02,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:02,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:02,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:02,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:02,660 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:52:02,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418019693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:02,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:02,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 20:52:02,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484222683] [2021-08-06 20:52:02,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:52:02,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:52:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:52:02,700 INFO L87 Difference]: Start difference. First operand 6215 states and 14806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:52:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:03,190 INFO L93 Difference]: Finished difference Result 7025 states and 15894 transitions. [2021-08-06 20:52:03,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:52:03,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) 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 31 [2021-08-06 20:52:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:03,201 INFO L225 Difference]: With dead ends: 7025 [2021-08-06 20:52:03,201 INFO L226 Difference]: Without dead ends: 7025 [2021-08-06 20:52:03,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=327, Invalid=863, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:52:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7025 states. [2021-08-06 20:52:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7025 to 6193. [2021-08-06 20:52:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6193 states, 6192 states have (on average 2.3811369509043927) internal successors, (14744), 6192 states have internal predecessors, (14744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6193 states to 6193 states and 14744 transitions. [2021-08-06 20:52:03,292 INFO L78 Accepts]: Start accepts. Automaton has 6193 states and 14744 transitions. Word has length 31 [2021-08-06 20:52:03,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:03,292 INFO L470 AbstractCegarLoop]: Abstraction has 6193 states and 14744 transitions. [2021-08-06 20:52:03,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:52:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6193 states and 14744 transitions. [2021-08-06 20:52:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:03,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:03,300 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:03,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 20:52:03,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 20:52:03,500 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:03,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1210845230, now seen corresponding path program 19 times [2021-08-06 20:52:03,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:03,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199986964] [2021-08-06 20:52:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:03,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:03,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:03,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199986964] [2021-08-06 20:52:03,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199986964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:03,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710475452] [2021-08-06 20:52:03,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:52:03,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:03,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:03,571 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:03,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 20:52:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:07,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:08,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:52:08,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:52:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:52:08,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710475452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:08,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:08,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 20:52:08,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697986258] [2021-08-06 20:52:08,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:52:08,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:08,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:52:08,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:52:08,198 INFO L87 Difference]: Start difference. First operand 6193 states and 14744 transitions. Second operand has 12 states, 12 states have (on average 3.75) 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) [2021-08-06 20:52:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:08,311 INFO L93 Difference]: Finished difference Result 6317 states and 14918 transitions. [2021-08-06 20:52:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:52:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) 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 31 [2021-08-06 20:52:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:08,320 INFO L225 Difference]: With dead ends: 6317 [2021-08-06 20:52:08,320 INFO L226 Difference]: Without dead ends: 6311 [2021-08-06 20:52:08,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:52:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-08-06 20:52:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 6179. [2021-08-06 20:52:08,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 2.3813531887342183) internal successors, (14712), 6178 states have internal predecessors, (14712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 14712 transitions. [2021-08-06 20:52:08,468 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 14712 transitions. Word has length 31 [2021-08-06 20:52:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:08,468 INFO L470 AbstractCegarLoop]: Abstraction has 6179 states and 14712 transitions. [2021-08-06 20:52:08,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) 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) [2021-08-06 20:52:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 14712 transitions. [2021-08-06 20:52:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:08,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:08,474 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] [2021-08-06 20:52:08,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 20:52:08,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:08,675 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1164250510, now seen corresponding path program 58 times [2021-08-06 20:52:08,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:08,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436744171] [2021-08-06 20:52:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:08,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:08,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:08,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436744171] [2021-08-06 20:52:08,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436744171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:08,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871813177] [2021-08-06 20:52:08,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:52:08,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:08,746 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:08,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 20:52:13,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:52:13,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:13,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:13,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:13,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:13,326 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:52:13,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871813177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:13,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:13,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 20:52:13,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218267323] [2021-08-06 20:52:13,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:52:13,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:52:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:52:13,362 INFO L87 Difference]: Start difference. First operand 6179 states and 14712 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:14,048 INFO L93 Difference]: Finished difference Result 7454 states and 16821 transitions. [2021-08-06 20:52:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:52:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 31 [2021-08-06 20:52:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:14,060 INFO L225 Difference]: With dead ends: 7454 [2021-08-06 20:52:14,060 INFO L226 Difference]: Without dead ends: 7454 [2021-08-06 20:52:14,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:52:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7454 states. [2021-08-06 20:52:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7454 to 6122. [2021-08-06 20:52:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6122 states, 6121 states have (on average 2.385231171377226) internal successors, (14600), 6121 states have internal predecessors, (14600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 14600 transitions. [2021-08-06 20:52:14,152 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 14600 transitions. Word has length 31 [2021-08-06 20:52:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:14,152 INFO L470 AbstractCegarLoop]: Abstraction has 6122 states and 14600 transitions. [2021-08-06 20:52:14,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 14600 transitions. [2021-08-06 20:52:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:14,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:14,159 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] [2021-08-06 20:52:14,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:14,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 20:52:14,359 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash 696250478, now seen corresponding path program 59 times [2021-08-06 20:52:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:14,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158680096] [2021-08-06 20:52:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:14,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:14,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:14,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158680096] [2021-08-06 20:52:14,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158680096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:14,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770227864] [2021-08-06 20:52:14,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:52:14,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:14,429 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:14,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 20:52:18,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:52:18,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:18,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:18,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:19,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:19,077 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:52:19,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770227864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:19,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:19,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 20:52:19,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275249711] [2021-08-06 20:52:19,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:52:19,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:52:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:52:19,113 INFO L87 Difference]: Start difference. First operand 6122 states and 14600 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-08-06 20:52:19,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:19,510 INFO L93 Difference]: Finished difference Result 7833 states and 18232 transitions. [2021-08-06 20:52:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:52:19,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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 31 [2021-08-06 20:52:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:19,522 INFO L225 Difference]: With dead ends: 7833 [2021-08-06 20:52:19,523 INFO L226 Difference]: Without dead ends: 7833 [2021-08-06 20:52:19,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:52:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2021-08-06 20:52:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 7222. [2021-08-06 20:52:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7222 states, 7221 states have (on average 2.3675391220052626) internal successors, (17096), 7221 states have internal predecessors, (17096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 17096 transitions. [2021-08-06 20:52:19,627 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 17096 transitions. Word has length 31 [2021-08-06 20:52:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:19,627 INFO L470 AbstractCegarLoop]: Abstraction has 7222 states and 17096 transitions. [2021-08-06 20:52:19,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-08-06 20:52:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 17096 transitions. [2021-08-06 20:52:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:19,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:19,636 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] [2021-08-06 20:52:19,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:19,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 20:52:19,836 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash -795754254, now seen corresponding path program 60 times [2021-08-06 20:52:19,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:19,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146165580] [2021-08-06 20:52:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:19,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:19,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:19,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146165580] [2021-08-06 20:52:19,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146165580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:19,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285194738] [2021-08-06 20:52:19,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:52:19,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:19,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:19,905 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:19,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 20:52:24,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:52:24,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:24,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:24,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:52:24,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285194738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:24,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:24,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 20:52:24,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115175533] [2021-08-06 20:52:24,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:52:24,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:52:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:52:24,595 INFO L87 Difference]: Start difference. First operand 7222 states and 17096 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-08-06 20:52:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:24,869 INFO L93 Difference]: Finished difference Result 7563 states and 17596 transitions. [2021-08-06 20:52:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:52:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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 31 [2021-08-06 20:52:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:24,880 INFO L225 Difference]: With dead ends: 7563 [2021-08-06 20:52:24,880 INFO L226 Difference]: Without dead ends: 7555 [2021-08-06 20:52:24,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:52:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7555 states. [2021-08-06 20:52:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7555 to 6609. [2021-08-06 20:52:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6609 states, 6608 states have (on average 2.366676755447942) internal successors, (15639), 6608 states have internal predecessors, (15639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 15639 transitions. [2021-08-06 20:52:24,985 INFO L78 Accepts]: Start accepts. Automaton has 6609 states and 15639 transitions. Word has length 31 [2021-08-06 20:52:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:24,985 INFO L470 AbstractCegarLoop]: Abstraction has 6609 states and 15639 transitions. [2021-08-06 20:52:24,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-08-06 20:52:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6609 states and 15639 transitions. [2021-08-06 20:52:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:24,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:24,993 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] [2021-08-06 20:52:25,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 20:52:25,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 20:52:25,194 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:25,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1181640082, now seen corresponding path program 61 times [2021-08-06 20:52:25,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:25,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756789474] [2021-08-06 20:52:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:25,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:25,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:25,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756789474] [2021-08-06 20:52:25,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756789474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:25,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910401956] [2021-08-06 20:52:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:52:25,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:25,266 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:25,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 20:52:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:29,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:29,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:29,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:29,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:29,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910401956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:29,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:29,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 20:52:29,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591357111] [2021-08-06 20:52:29,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:52:29,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:29,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:52:29,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:52:29,983 INFO L87 Difference]: Start difference. First operand 6609 states and 15639 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:30,465 INFO L93 Difference]: Finished difference Result 7747 states and 17887 transitions. [2021-08-06 20:52:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:52:30,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 31 [2021-08-06 20:52:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:30,476 INFO L225 Difference]: With dead ends: 7747 [2021-08-06 20:52:30,476 INFO L226 Difference]: Without dead ends: 7747 [2021-08-06 20:52:30,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:52:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7747 states. [2021-08-06 20:52:30,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7747 to 6701. [2021-08-06 20:52:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6701 states, 6700 states have (on average 2.362089552238806) internal successors, (15826), 6700 states have internal predecessors, (15826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6701 states to 6701 states and 15826 transitions. [2021-08-06 20:52:30,572 INFO L78 Accepts]: Start accepts. Automaton has 6701 states and 15826 transitions. Word has length 31 [2021-08-06 20:52:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:30,572 INFO L470 AbstractCegarLoop]: Abstraction has 6701 states and 15826 transitions. [2021-08-06 20:52:30,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 6701 states and 15826 transitions. [2021-08-06 20:52:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:30,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:30,580 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] [2021-08-06 20:52:30,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 20:52:30,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 20:52:30,780 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:30,781 INFO L82 PathProgramCache]: Analyzing trace with hash 82150126, now seen corresponding path program 62 times [2021-08-06 20:52:30,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:30,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035800721] [2021-08-06 20:52:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:30,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:30,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:30,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035800721] [2021-08-06 20:52:30,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035800721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:30,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282396526] [2021-08-06 20:52:30,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:52:30,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:30,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:30,911 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:30,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 20:52:35,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:52:35,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:35,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:35,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:35,532 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:52:35,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282396526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:35,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:35,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-06 20:52:35,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899549110] [2021-08-06 20:52:35,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:52:35,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:35,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:52:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:52:35,568 INFO L87 Difference]: Start difference. First operand 6701 states and 15826 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:52:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:36,091 INFO L93 Difference]: Finished difference Result 7473 states and 17447 transitions. [2021-08-06 20:52:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:52:36,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 31 [2021-08-06 20:52:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:36,102 INFO L225 Difference]: With dead ends: 7473 [2021-08-06 20:52:36,102 INFO L226 Difference]: Without dead ends: 7473 [2021-08-06 20:52:36,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:52:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7473 states. [2021-08-06 20:52:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7473 to 6410. [2021-08-06 20:52:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6410 states, 6409 states have (on average 2.376501794351693) internal successors, (15231), 6409 states have internal predecessors, (15231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 15231 transitions. [2021-08-06 20:52:36,198 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 15231 transitions. Word has length 31 [2021-08-06 20:52:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:36,198 INFO L470 AbstractCegarLoop]: Abstraction has 6410 states and 15231 transitions. [2021-08-06 20:52:36,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:52:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 15231 transitions. [2021-08-06 20:52:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:36,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:36,205 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:36,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:36,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:36,406 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:36,406 INFO L82 PathProgramCache]: Analyzing trace with hash 344984690, now seen corresponding path program 20 times [2021-08-06 20:52:36,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:36,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873794313] [2021-08-06 20:52:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:36,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:36,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:36,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873794313] [2021-08-06 20:52:36,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873794313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:36,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419222232] [2021-08-06 20:52:36,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:52:36,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:36,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:36,478 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:36,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 20:52:40,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:52:40,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:40,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:52:40,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:41,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:41,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:52:41,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419222232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:41,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:41,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-06 20:52:41,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362657196] [2021-08-06 20:52:41,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:52:41,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:52:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:52:41,241 INFO L87 Difference]: Start difference. First operand 6410 states and 15231 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:41,669 INFO L93 Difference]: Finished difference Result 12071 states and 26045 transitions. [2021-08-06 20:52:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:52:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 31 [2021-08-06 20:52:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:41,688 INFO L225 Difference]: With dead ends: 12071 [2021-08-06 20:52:41,688 INFO L226 Difference]: Without dead ends: 12071 [2021-08-06 20:52:41,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:52:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12071 states. [2021-08-06 20:52:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12071 to 8121. [2021-08-06 20:52:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8121 states, 8120 states have (on average 2.3866995073891624) internal successors, (19380), 8120 states have internal predecessors, (19380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8121 states to 8121 states and 19380 transitions. [2021-08-06 20:52:41,845 INFO L78 Accepts]: Start accepts. Automaton has 8121 states and 19380 transitions. Word has length 31 [2021-08-06 20:52:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:41,845 INFO L470 AbstractCegarLoop]: Abstraction has 8121 states and 19380 transitions. [2021-08-06 20:52:41,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8121 states and 19380 transitions. [2021-08-06 20:52:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:41,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:41,855 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] [2021-08-06 20:52:41,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:42,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:42,057 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1971392878, now seen corresponding path program 63 times [2021-08-06 20:52:42,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:42,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935069414] [2021-08-06 20:52:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:42,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:42,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:42,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935069414] [2021-08-06 20:52:42,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935069414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:42,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733207748] [2021-08-06 20:52:42,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:52:42,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:42,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:42,126 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:42,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 20:52:46,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:52:46,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:46,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:46,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:46,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:46,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733207748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:46,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:46,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:52:46,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422985026] [2021-08-06 20:52:46,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:52:46,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:52:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:52:46,864 INFO L87 Difference]: Start difference. First operand 8121 states and 19380 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:52:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:47,362 INFO L93 Difference]: Finished difference Result 10891 states and 25407 transitions. [2021-08-06 20:52:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:52:47,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 31 [2021-08-06 20:52:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:47,380 INFO L225 Difference]: With dead ends: 10891 [2021-08-06 20:52:47,380 INFO L226 Difference]: Without dead ends: 10891 [2021-08-06 20:52:47,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:52:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10891 states. [2021-08-06 20:52:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10891 to 9612. [2021-08-06 20:52:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9612 states, 9611 states have (on average 2.3788367495577982) internal successors, (22863), 9611 states have internal predecessors, (22863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9612 states to 9612 states and 22863 transitions. [2021-08-06 20:52:47,569 INFO L78 Accepts]: Start accepts. Automaton has 9612 states and 22863 transitions. Word has length 31 [2021-08-06 20:52:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:47,569 INFO L470 AbstractCegarLoop]: Abstraction has 9612 states and 22863 transitions. [2021-08-06 20:52:47,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:52:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 9612 states and 22863 transitions. [2021-08-06 20:52:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:47,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:47,579 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] [2021-08-06 20:52:47,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:47,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:47,780 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash 479388146, now seen corresponding path program 64 times [2021-08-06 20:52:47,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:47,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831263792] [2021-08-06 20:52:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:47,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:47,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831263792] [2021-08-06 20:52:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831263792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996424938] [2021-08-06 20:52:47,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:52:47,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:47,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:47,858 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:47,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 20:52:52,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:52:52,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:52,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:52,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:52,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:52,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:52:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:52,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996424938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:52,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:52,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:52:52,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366643910] [2021-08-06 20:52:52,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:52:52,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:52:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:52:52,569 INFO L87 Difference]: Start difference. First operand 9612 states and 22863 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:52:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:52,848 INFO L93 Difference]: Finished difference Result 9841 states and 23123 transitions. [2021-08-06 20:52:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:52:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 31 [2021-08-06 20:52:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:52,863 INFO L225 Difference]: With dead ends: 9841 [2021-08-06 20:52:52,863 INFO L226 Difference]: Without dead ends: 9837 [2021-08-06 20:52:52,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:52:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9837 states. [2021-08-06 20:52:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9837 to 8539. [2021-08-06 20:52:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8539 states, 8538 states have (on average 2.3829936753338017) internal successors, (20346), 8538 states have internal predecessors, (20346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8539 states to 8539 states and 20346 transitions. [2021-08-06 20:52:53,006 INFO L78 Accepts]: Start accepts. Automaton has 8539 states and 20346 transitions. Word has length 31 [2021-08-06 20:52:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:53,007 INFO L470 AbstractCegarLoop]: Abstraction has 8539 states and 20346 transitions. [2021-08-06 20:52:53,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:52:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8539 states and 20346 transitions. [2021-08-06 20:52:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:53,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:53,017 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:53,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 20:52:53,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:53,217 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1436207598, now seen corresponding path program 21 times [2021-08-06 20:52:53,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:53,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308944526] [2021-08-06 20:52:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:53,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:53,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:53,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308944526] [2021-08-06 20:52:53,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308944526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:53,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870262797] [2021-08-06 20:52:53,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:52:53,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:53,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:53,409 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:53,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 20:52:57,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:52:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:52:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:52:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:52:58,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:52:58,091 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:52:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:52:58,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870262797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:58,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:52:58,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:52:58,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304624023] [2021-08-06 20:52:58,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:52:58,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:52:58,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:52:58,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:52:58,127 INFO L87 Difference]: Start difference. First operand 8539 states and 20346 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:52:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:52:58,240 INFO L93 Difference]: Finished difference Result 9441 states and 22273 transitions. [2021-08-06 20:52:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:52:58,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) 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 31 [2021-08-06 20:52:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:52:58,255 INFO L225 Difference]: With dead ends: 9441 [2021-08-06 20:52:58,255 INFO L226 Difference]: Without dead ends: 9439 [2021-08-06 20:52:58,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:52:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9439 states. [2021-08-06 20:52:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9439 to 8571. [2021-08-06 20:52:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8571 states, 8570 states have (on average 2.382963827304551) internal successors, (20422), 8570 states have internal predecessors, (20422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:52:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8571 states to 8571 states and 20422 transitions. [2021-08-06 20:52:58,381 INFO L78 Accepts]: Start accepts. Automaton has 8571 states and 20422 transitions. Word has length 31 [2021-08-06 20:52:58,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:52:58,381 INFO L470 AbstractCegarLoop]: Abstraction has 8571 states and 20422 transitions. [2021-08-06 20:52:58,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:52:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8571 states and 20422 transitions. [2021-08-06 20:52:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:52:58,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:52:58,391 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:52:58,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 20:52:58,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:58,591 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:52:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:52:58,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1666293266, now seen corresponding path program 22 times [2021-08-06 20:52:58,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:52:58,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127770704] [2021-08-06 20:52:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:52:58,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:52:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:52:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:52:58,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:52:58,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127770704] [2021-08-06 20:52:58,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127770704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:52:58,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136774606] [2021-08-06 20:52:58,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:52:58,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:52:58,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:52:58,654 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:52:58,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 20:53:03,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:53:03,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:03,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:03,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:03,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:03,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:53:03,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136774606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:03,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:03,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:53:03,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639679115] [2021-08-06 20:53:03,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:53:03,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:53:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:53:03,512 INFO L87 Difference]: Start difference. First operand 8571 states and 20422 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:53:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:03,664 INFO L93 Difference]: Finished difference Result 9444 states and 22288 transitions. [2021-08-06 20:53:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:53:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) 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 31 [2021-08-06 20:53:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:03,686 INFO L225 Difference]: With dead ends: 9444 [2021-08-06 20:53:03,687 INFO L226 Difference]: Without dead ends: 9444 [2021-08-06 20:53:03,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:53:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9444 states. [2021-08-06 20:53:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9444 to 8569. [2021-08-06 20:53:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8569 states, 8568 states have (on average 2.3823529411764706) internal successors, (20412), 8568 states have internal predecessors, (20412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8569 states to 8569 states and 20412 transitions. [2021-08-06 20:53:03,900 INFO L78 Accepts]: Start accepts. Automaton has 8569 states and 20412 transitions. Word has length 31 [2021-08-06 20:53:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:03,900 INFO L470 AbstractCegarLoop]: Abstraction has 8569 states and 20412 transitions. [2021-08-06 20:53:03,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) 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) [2021-08-06 20:53:03,901 INFO L276 IsEmpty]: Start isEmpty. Operand 8569 states and 20412 transitions. [2021-08-06 20:53:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:03,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:03,914 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:03,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 20:53:04,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 20:53:04,118 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:04,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash 326736558, now seen corresponding path program 23 times [2021-08-06 20:53:04,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:04,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603106674] [2021-08-06 20:53:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:04,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:53:04,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:04,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603106674] [2021-08-06 20:53:04,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603106674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:04,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595661519] [2021-08-06 20:53:04,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:53:04,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:04,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:04,203 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:04,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 20:53:08,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:53:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:09,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:09,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:53:09,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595661519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:09,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:09,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:53:09,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825059870] [2021-08-06 20:53:09,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:53:09,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:53:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:53:09,065 INFO L87 Difference]: Start difference. First operand 8569 states and 20412 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-08-06 20:53:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:09,199 INFO L93 Difference]: Finished difference Result 9406 states and 22203 transitions. [2021-08-06 20:53:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:53:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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 31 [2021-08-06 20:53:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:09,214 INFO L225 Difference]: With dead ends: 9406 [2021-08-06 20:53:09,214 INFO L226 Difference]: Without dead ends: 9406 [2021-08-06 20:53:09,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:53:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9406 states. [2021-08-06 20:53:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9406 to 9207. [2021-08-06 20:53:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9207 states, 9206 states have (on average 2.3701933521616336) internal successors, (21820), 9206 states have internal predecessors, (21820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9207 states to 9207 states and 21820 transitions. [2021-08-06 20:53:09,350 INFO L78 Accepts]: Start accepts. Automaton has 9207 states and 21820 transitions. Word has length 31 [2021-08-06 20:53:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:09,350 INFO L470 AbstractCegarLoop]: Abstraction has 9207 states and 21820 transitions. [2021-08-06 20:53:09,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-08-06 20:53:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9207 states and 21820 transitions. [2021-08-06 20:53:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:09,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:09,361 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] [2021-08-06 20:53:09,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:09,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 20:53:09,562 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:09,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1398839190, now seen corresponding path program 65 times [2021-08-06 20:53:09,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:09,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84109886] [2021-08-06 20:53:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:09,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:09,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:09,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84109886] [2021-08-06 20:53:09,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84109886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:09,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053268373] [2021-08-06 20:53:09,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:53:09,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:09,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:09,732 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:09,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 20:53:14,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:53:14,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:14,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:14,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:14,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:14,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:14,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053268373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:14,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:14,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:53:14,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830100231] [2021-08-06 20:53:14,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:53:14,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:53:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:53:14,434 INFO L87 Difference]: Start difference. First operand 9207 states and 21820 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:53:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:14,908 INFO L93 Difference]: Finished difference Result 9549 states and 22517 transitions. [2021-08-06 20:53:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:53:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 31 [2021-08-06 20:53:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:14,925 INFO L225 Difference]: With dead ends: 9549 [2021-08-06 20:53:14,925 INFO L226 Difference]: Without dead ends: 9549 [2021-08-06 20:53:14,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=378, Invalid=1104, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:53:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-08-06 20:53:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 9303. [2021-08-06 20:53:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 2.3671253493872286) internal successors, (22019), 9302 states have internal predecessors, (22019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 22019 transitions. [2021-08-06 20:53:15,058 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 22019 transitions. Word has length 31 [2021-08-06 20:53:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:15,058 INFO L470 AbstractCegarLoop]: Abstraction has 9303 states and 22019 transitions. [2021-08-06 20:53:15,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) 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) [2021-08-06 20:53:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 22019 transitions. [2021-08-06 20:53:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:15,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:15,068 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:15,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 20:53:15,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 20:53:15,269 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -11600978, now seen corresponding path program 24 times [2021-08-06 20:53:15,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:15,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166588851] [2021-08-06 20:53:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:15,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:15,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:15,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166588851] [2021-08-06 20:53:15,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166588851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:15,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325624648] [2021-08-06 20:53:15,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:53:15,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:15,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:15,367 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:15,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 20:53:19,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:53:19,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:20,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:20,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:20,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325624648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:20,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:20,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:53:20,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912067144] [2021-08-06 20:53:20,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:53:20,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:53:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:53:20,118 INFO L87 Difference]: Start difference. First operand 9303 states and 22019 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:53:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:20,268 INFO L93 Difference]: Finished difference Result 9696 states and 22828 transitions. [2021-08-06 20:53:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:53:20,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 31 [2021-08-06 20:53:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:20,283 INFO L225 Difference]: With dead ends: 9696 [2021-08-06 20:53:20,283 INFO L226 Difference]: Without dead ends: 9696 [2021-08-06 20:53:20,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:53:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9696 states. [2021-08-06 20:53:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9696 to 9587. [2021-08-06 20:53:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9587 states, 9586 states have (on average 2.3598998539536824) internal successors, (22622), 9586 states have internal predecessors, (22622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9587 states to 9587 states and 22622 transitions. [2021-08-06 20:53:20,416 INFO L78 Accepts]: Start accepts. Automaton has 9587 states and 22622 transitions. Word has length 31 [2021-08-06 20:53:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:20,416 INFO L470 AbstractCegarLoop]: Abstraction has 9587 states and 22622 transitions. [2021-08-06 20:53:20,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-08-06 20:53:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 9587 states and 22622 transitions. [2021-08-06 20:53:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:20,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:20,426 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:53:20,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 20:53:20,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 20:53:20,627 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1694192726, now seen corresponding path program 32 times [2021-08-06 20:53:20,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:20,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004605628] [2021-08-06 20:53:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:20,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:20,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:20,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004605628] [2021-08-06 20:53:20,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004605628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:20,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335909050] [2021-08-06 20:53:20,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:53:20,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:20,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:20,709 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:20,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 20:53:25,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:53:25,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:25,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:53:25,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:25,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335909050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:25,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:25,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:53:25,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029306633] [2021-08-06 20:53:25,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:53:25,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:53:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:53:25,604 INFO L87 Difference]: Start difference. First operand 9587 states and 22622 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:25,835 INFO L93 Difference]: Finished difference Result 10103 states and 23671 transitions. [2021-08-06 20:53:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:53:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 31 [2021-08-06 20:53:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:25,851 INFO L225 Difference]: With dead ends: 10103 [2021-08-06 20:53:25,852 INFO L226 Difference]: Without dead ends: 10103 [2021-08-06 20:53:25,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:53:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10103 states. [2021-08-06 20:53:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10103 to 9584. [2021-08-06 20:53:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9584 states, 9583 states have (on average 2.3589690076176564) internal successors, (22606), 9583 states have internal predecessors, (22606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9584 states to 9584 states and 22606 transitions. [2021-08-06 20:53:25,995 INFO L78 Accepts]: Start accepts. Automaton has 9584 states and 22606 transitions. Word has length 31 [2021-08-06 20:53:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:25,995 INFO L470 AbstractCegarLoop]: Abstraction has 9584 states and 22606 transitions. [2021-08-06 20:53:25,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9584 states and 22606 transitions. [2021-08-06 20:53:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:26,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:26,007 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] [2021-08-06 20:53:26,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 20:53:26,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:26,209 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1501653802, now seen corresponding path program 66 times [2021-08-06 20:53:26,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:26,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83157988] [2021-08-06 20:53:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:26,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:26,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:26,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83157988] [2021-08-06 20:53:26,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83157988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:26,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241432611] [2021-08-06 20:53:26,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:53:26,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:26,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:26,284 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:26,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 20:53:31,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:53:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:31,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:31,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:31,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:31,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:31,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241432611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:31,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:31,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:53:31,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537460609] [2021-08-06 20:53:31,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:53:31,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:53:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:53:31,243 INFO L87 Difference]: Start difference. First operand 9584 states and 22606 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:53:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:31,610 INFO L93 Difference]: Finished difference Result 9993 states and 23472 transitions. [2021-08-06 20:53:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:53:31,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) 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 31 [2021-08-06 20:53:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:31,627 INFO L225 Difference]: With dead ends: 9993 [2021-08-06 20:53:31,627 INFO L226 Difference]: Without dead ends: 9993 [2021-08-06 20:53:31,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=325, Invalid=865, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:53:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9993 states. [2021-08-06 20:53:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9993 to 9734. [2021-08-06 20:53:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9734 states, 9733 states have (on average 2.3548751669577723) internal successors, (22920), 9733 states have internal predecessors, (22920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9734 states to 9734 states and 22920 transitions. [2021-08-06 20:53:31,770 INFO L78 Accepts]: Start accepts. Automaton has 9734 states and 22920 transitions. Word has length 31 [2021-08-06 20:53:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:31,770 INFO L470 AbstractCegarLoop]: Abstraction has 9734 states and 22920 transitions. [2021-08-06 20:53:31,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) 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) [2021-08-06 20:53:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9734 states and 22920 transitions. [2021-08-06 20:53:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:31,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:31,781 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] [2021-08-06 20:53:31,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:31,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:31,985 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash -587470294, now seen corresponding path program 67 times [2021-08-06 20:53:31,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:31,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641669034] [2021-08-06 20:53:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:31,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:32,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:32,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641669034] [2021-08-06 20:53:32,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641669034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:32,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564790283] [2021-08-06 20:53:32,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:53:32,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:32,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:32,070 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:32,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 20:53:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:36,830 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:36,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:36,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564790283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:36,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:36,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:53:36,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374892371] [2021-08-06 20:53:36,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:53:36,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:53:36,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:53:36,866 INFO L87 Difference]: Start difference. First operand 9734 states and 22920 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:53:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:37,106 INFO L93 Difference]: Finished difference Result 9953 states and 23369 transitions. [2021-08-06 20:53:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:53:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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 31 [2021-08-06 20:53:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:37,121 INFO L225 Difference]: With dead ends: 9953 [2021-08-06 20:53:37,121 INFO L226 Difference]: Without dead ends: 9953 [2021-08-06 20:53:37,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:53:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-08-06 20:53:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 9726. [2021-08-06 20:53:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9726 states, 9725 states have (on average 2.3553727506426734) internal successors, (22906), 9725 states have internal predecessors, (22906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9726 states to 9726 states and 22906 transitions. [2021-08-06 20:53:37,346 INFO L78 Accepts]: Start accepts. Automaton has 9726 states and 22906 transitions. Word has length 31 [2021-08-06 20:53:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:37,346 INFO L470 AbstractCegarLoop]: Abstraction has 9726 states and 22906 transitions. [2021-08-06 20:53:37,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:53:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9726 states and 22906 transitions. [2021-08-06 20:53:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:37,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:37,357 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] [2021-08-06 20:53:37,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 20:53:37,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 20:53:37,557 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:37,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1511553682, now seen corresponding path program 68 times [2021-08-06 20:53:37,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:37,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767586219] [2021-08-06 20:53:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:37,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:37,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:37,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767586219] [2021-08-06 20:53:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767586219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:37,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778109721] [2021-08-06 20:53:37,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:53:37,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:37,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:37,630 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:37,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 20:53:42,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:53:42,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:42,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:42,381 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:42,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:42,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778109721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:42,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:42,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-06 20:53:42,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656644495] [2021-08-06 20:53:42,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:53:42,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:53:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:53:42,417 INFO L87 Difference]: Start difference. First operand 9726 states and 22906 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:42,644 INFO L93 Difference]: Finished difference Result 10116 states and 23731 transitions. [2021-08-06 20:53:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:53:42,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 31 [2021-08-06 20:53:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:42,660 INFO L225 Difference]: With dead ends: 10116 [2021-08-06 20:53:42,660 INFO L226 Difference]: Without dead ends: 10116 [2021-08-06 20:53:42,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:53:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-08-06 20:53:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 9740. [2021-08-06 20:53:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9740 states, 9739 states have (on average 2.355580655098059) internal successors, (22941), 9739 states have internal predecessors, (22941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9740 states to 9740 states and 22941 transitions. [2021-08-06 20:53:42,801 INFO L78 Accepts]: Start accepts. Automaton has 9740 states and 22941 transitions. Word has length 31 [2021-08-06 20:53:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:42,801 INFO L470 AbstractCegarLoop]: Abstraction has 9740 states and 22941 transitions. [2021-08-06 20:53:42,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 9740 states and 22941 transitions. [2021-08-06 20:53:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:42,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:42,812 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] [2021-08-06 20:53:42,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 20:53:43,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 20:53:43,012 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:43,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1560825174, now seen corresponding path program 69 times [2021-08-06 20:53:43,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:43,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219580347] [2021-08-06 20:53:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:43,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:43,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:43,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219580347] [2021-08-06 20:53:43,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219580347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:43,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744302261] [2021-08-06 20:53:43,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:53:43,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:43,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:43,106 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:43,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 20:53:47,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:53:47,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:47,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:47,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:47,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744302261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:47,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:47,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:53:47,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258341243] [2021-08-06 20:53:47,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:53:47,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:47,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:53:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:53:47,939 INFO L87 Difference]: Start difference. First operand 9740 states and 22941 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:53:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:48,173 INFO L93 Difference]: Finished difference Result 9972 states and 23414 transitions. [2021-08-06 20:53:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:53:48,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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 31 [2021-08-06 20:53:48,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:48,189 INFO L225 Difference]: With dead ends: 9972 [2021-08-06 20:53:48,189 INFO L226 Difference]: Without dead ends: 9972 [2021-08-06 20:53:48,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:53:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9972 states. [2021-08-06 20:53:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9972 to 9729. [2021-08-06 20:53:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9729 states, 9728 states have (on average 2.3557771381578947) internal successors, (22917), 9728 states have internal predecessors, (22917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9729 states to 9729 states and 22917 transitions. [2021-08-06 20:53:48,328 INFO L78 Accepts]: Start accepts. Automaton has 9729 states and 22917 transitions. Word has length 31 [2021-08-06 20:53:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:48,328 INFO L470 AbstractCegarLoop]: Abstraction has 9729 states and 22917 transitions. [2021-08-06 20:53:48,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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) [2021-08-06 20:53:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 9729 states and 22917 transitions. [2021-08-06 20:53:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:48,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:48,339 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] [2021-08-06 20:53:48,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 20:53:48,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:48,541 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1204239506, now seen corresponding path program 70 times [2021-08-06 20:53:48,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:48,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446061015] [2021-08-06 20:53:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:48,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:48,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:48,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446061015] [2021-08-06 20:53:48,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446061015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:48,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940351760] [2021-08-06 20:53:48,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:53:48,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:48,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:48,614 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:48,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 20:53:53,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:53:53,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:53,458 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:53,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:53,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940351760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:53,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:53,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:53:53,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254217865] [2021-08-06 20:53:53,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:53:53,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:53:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:53:53,494 INFO L87 Difference]: Start difference. First operand 9729 states and 22917 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:53,772 INFO L93 Difference]: Finished difference Result 10117 states and 23777 transitions. [2021-08-06 20:53:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:53:53,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 31 [2021-08-06 20:53:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:53,788 INFO L225 Difference]: With dead ends: 10117 [2021-08-06 20:53:53,788 INFO L226 Difference]: Without dead ends: 10117 [2021-08-06 20:53:53,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:53:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10117 states. [2021-08-06 20:53:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10117 to 9821. [2021-08-06 20:53:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9821 states, 9820 states have (on average 2.355091649694501) internal successors, (23127), 9820 states have internal predecessors, (23127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9821 states to 9821 states and 23127 transitions. [2021-08-06 20:53:53,931 INFO L78 Accepts]: Start accepts. Automaton has 9821 states and 23127 transitions. Word has length 31 [2021-08-06 20:53:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:53,932 INFO L470 AbstractCegarLoop]: Abstraction has 9821 states and 23127 transitions. [2021-08-06 20:53:53,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 9821 states and 23127 transitions. [2021-08-06 20:53:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:53,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:53,942 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] [2021-08-06 20:53:53,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 20:53:54,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:54,143 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:53:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:53:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash 210983986, now seen corresponding path program 71 times [2021-08-06 20:53:54,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:53:54,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253449630] [2021-08-06 20:53:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:53:54,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:53:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:53:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:54,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:53:54,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253449630] [2021-08-06 20:53:54,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253449630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:54,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361415920] [2021-08-06 20:53:54,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:53:54,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:53:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:53:54,340 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:53:54,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 20:53:58,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:53:58,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:53:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:53:58,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:53:59,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:59,156 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:53:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:53:59,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361415920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:53:59,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:53:59,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:53:59,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600545547] [2021-08-06 20:53:59,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:53:59,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:53:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:53:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:53:59,191 INFO L87 Difference]: Start difference. First operand 9821 states and 23127 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:53:59,724 INFO L93 Difference]: Finished difference Result 10559 states and 24693 transitions. [2021-08-06 20:53:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:53:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 31 [2021-08-06 20:53:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:53:59,740 INFO L225 Difference]: With dead ends: 10559 [2021-08-06 20:53:59,740 INFO L226 Difference]: Without dead ends: 10559 [2021-08-06 20:53:59,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:53:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-08-06 20:53:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 9899. [2021-08-06 20:53:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9899 states, 9898 states have (on average 2.352697514649424) internal successors, (23287), 9898 states have internal predecessors, (23287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9899 states to 9899 states and 23287 transitions. [2021-08-06 20:53:59,884 INFO L78 Accepts]: Start accepts. Automaton has 9899 states and 23287 transitions. Word has length 31 [2021-08-06 20:53:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:53:59,884 INFO L470 AbstractCegarLoop]: Abstraction has 9899 states and 23287 transitions. [2021-08-06 20:53:59,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:53:59,884 INFO L276 IsEmpty]: Start isEmpty. Operand 9899 states and 23287 transitions. [2021-08-06 20:53:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:53:59,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:53:59,895 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] [2021-08-06 20:53:59,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 20:54:00,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:00,095 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1570551058, now seen corresponding path program 72 times [2021-08-06 20:54:00,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:00,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275826244] [2021-08-06 20:54:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:00,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:00,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:00,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275826244] [2021-08-06 20:54:00,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275826244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:00,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270323019] [2021-08-06 20:54:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:54:00,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:00,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:00,165 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:00,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 20:54:04,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:54:04,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:04,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:54:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:05,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:54:05,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 20:54:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:05,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270323019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:05,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:54:05,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:54:05,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577587115] [2021-08-06 20:54:05,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:54:05,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:54:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:54:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:54:05,176 INFO L87 Difference]: Start difference. First operand 9899 states and 23287 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-08-06 20:54:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:54:05,613 INFO L93 Difference]: Finished difference Result 10577 states and 24737 transitions. [2021-08-06 20:54:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:54:05,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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 31 [2021-08-06 20:54:05,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:54:05,630 INFO L225 Difference]: With dead ends: 10577 [2021-08-06 20:54:05,630 INFO L226 Difference]: Without dead ends: 10577 [2021-08-06 20:54:05,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=295, Invalid=761, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:54:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10577 states. [2021-08-06 20:54:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10577 to 9913. [2021-08-06 20:54:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9913 states, 9912 states have (on average 2.3536117836965293) internal successors, (23329), 9912 states have internal predecessors, (23329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:54:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9913 states to 9913 states and 23329 transitions. [2021-08-06 20:54:05,778 INFO L78 Accepts]: Start accepts. Automaton has 9913 states and 23329 transitions. Word has length 31 [2021-08-06 20:54:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:54:05,778 INFO L470 AbstractCegarLoop]: Abstraction has 9913 states and 23329 transitions. [2021-08-06 20:54:05,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-08-06 20:54:05,778 INFO L276 IsEmpty]: Start isEmpty. Operand 9913 states and 23329 transitions. [2021-08-06 20:54:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:54:05,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:54:05,789 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] [2021-08-06 20:54:05,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 20:54:05,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 20:54:05,990 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:54:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:54:05,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1510264400, now seen corresponding path program 33 times [2021-08-06 20:54:05,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:54:05,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378968171] [2021-08-06 20:54:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:54:05,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:54:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:54:06,084 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 72.5 percent of original size [2021-08-06 20:54:06,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 72.5 percent of original size [2021-08-06 20:54:06,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.2 percent of original size [2021-08-06 20:54:06,118 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.2 percent of original size [2021-08-06 20:54:06,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 20:54:06,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 20:54:06,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 74.4 percent of original size [2021-08-06 20:54:06,200 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 74.4 percent of original size [2021-08-06 20:54:06,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 86.8 percent of original size [2021-08-06 20:54:06,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 86.8 percent of original size [2021-08-06 20:54:06,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 93.0 percent of original size [2021-08-06 20:54:06,292 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 93.0 percent of original size [2021-08-06 20:54:06,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 85.5 percent of original size [2021-08-06 20:54:06,372 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 85.5 percent of original size [2021-08-06 20:54:06,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 81.3 percent of original size [2021-08-06 20:54:06,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 81.3 percent of original size [2021-08-06 20:54:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:54:07,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:54:07,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378968171] [2021-08-06 20:54:07,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378968171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:54:07,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960529985] [2021-08-06 20:54:07,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:54:07,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:54:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:54:07,025 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:54:07,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 20:54:11,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:54:11,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:54:11,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:54:11,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:54:11,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:54:11,939 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 92.0 percent of original size [2021-08-06 20:54:12,913 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.7 percent of original size [2021-08-06 20:54:12,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.7 percent of original size [2021-08-06 20:54:14,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:54:14,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:54:14,244 INFO L354 Elim1Store]: treesize reduction 26, result has 86.9 percent of original size [2021-08-06 20:54:14,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 152 treesize of output 256 Received shutdown request... [2021-08-06 20:54:27,087 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:54:27,087 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:54:27,089 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:54:27,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 20:54:27,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 20:54:27,305 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-3-4-4-3-4-5-5-4-4-3-2-2-2-2-2-1 context. [2021-08-06 20:54:27,307 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:54:27,307 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:54:27,307 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:54:27,311 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:54:27,312 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:54:27,313 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:54:27 BasicIcfg [2021-08-06 20:54:27,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:54:27,314 INFO L168 Benchmark]: Toolchain (without parser) took 700174.38 ms. Allocated memory was 201.3 MB in the beginning and 3.0 GB in the end (delta: 2.8 GB). Free memory was 181.4 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-06 20:54:27,314 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.50 ms. Allocated memory is still 201.3 MB. Free memory was 182.6 MB in the beginning and 182.5 MB in the end (delta: 114.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:54:27,314 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.53 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 179.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:54:27,314 INFO L168 Benchmark]: Boogie Preprocessor took 23.38 ms. Allocated memory is still 201.3 MB. Free memory was 179.8 MB in the beginning and 178.9 MB in the end (delta: 939.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:54:27,314 INFO L168 Benchmark]: RCFGBuilder took 243.13 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 165.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:54:27,314 INFO L168 Benchmark]: TraceAbstraction took 699876.03 ms. Allocated memory was 201.3 MB in the beginning and 3.0 GB in the end (delta: 2.8 GB). Free memory was 164.7 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-06 20:54:27,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.50 ms. Allocated memory is still 201.3 MB. Free memory was 182.6 MB in the beginning and 182.5 MB in the end (delta: 114.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.53 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 179.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.38 ms. Allocated memory is still 201.3 MB. Free memory was 179.8 MB in the beginning and 178.9 MB in the end (delta: 939.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 243.13 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 165.2 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 699876.03 ms. Allocated memory was 201.3 MB in the beginning and 3.0 GB in the end (delta: 2.8 GB). Free memory was 164.7 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-3-4-4-3-4-5-5-4-4-3-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-3-4-4-3-4-5-5-4-4-3-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-3-4-4-3-4-5-5-4-4-3-2-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-3-4-4-3-4-5-5-4-4-3-2-2-2-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 699799.5ms, OverallIterations: 135, TraceHistogramMax: 3, EmptinessCheckTime: 468.5ms, AutomataDifference: 134813.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 123.9ms, PartialOrderReductionTime: 107.4ms, HoareTripleCheckerStatistics: 4117 SDtfs, 24512 SDslu, 24371 SDs, 0 SdLazy, 47650 SolverSat, 4518 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 30272.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7620 GetRequests, 3024 SyntacticMatches, 139 SemanticMatches, 4457 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58880 ImplicationChecksByTransitivity, 122059.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9913occurred in iteration=134, InterpolantAutomatonStates: 3766, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6052.4ms AutomataMinimizationTime, 134 MinimizatonAttempts, 73942 StatesRemovedByMinimization, 134 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 493.9ms SsaConstructionTime, 2007.7ms SatisfiabilityAnalysisTime, 141000.0ms InterpolantComputationTime, 7711 NumberOfCodeBlocks, 7711 NumberOfCodeBlocksAsserted, 427 NumberOfCheckSat, 7448 ConstructedInterpolants, 25 QuantifiedInterpolants, 76243 SizeOfPredicates, 553 NumberOfNonLiveVariables, 8114 ConjunctsInSsa, 1566 ConjunctsInUnsatCore, 263 InterpolantComputations, 5 PerfectInterpolantSequences, 654/2054 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown