/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:00:50,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:00:50,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:00:50,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:00:50,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:00:50,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:00:50,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:00:50,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:00:50,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:00:50,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:00:50,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:00:50,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:00:50,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:00:50,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:00:50,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:00:50,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:00:50,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:00:50,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:00:50,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:00:50,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:00:50,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:00:50,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:00:50,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:00:50,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:00:50,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:00:50,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:00:50,302 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:00:50,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:00:50,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:00:50,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:00:50,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:00:50,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:00:50,660 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:00:50,661 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:00:50,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-08-21 12:00:50,671 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-08-21 12:00:50,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:00:50,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:00:50,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:00:50,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:00:50,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:00:50,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:00:50,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:00:50,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:00:50,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:00:50,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:00:50,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:00:50,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:00:50,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:00:50,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/1) ... [2021-08-21 12:00:50,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:00:50,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:50,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:00:50,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:00:50,845 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:00:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:00:50,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:00:50,846 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:00:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:00:50,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:00:50,846 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:00:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:00:50,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:00:50,847 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:00:51,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:00:51,063 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 12:00:51,063 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 12:00:51,064 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 12:00:51,065 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:00:51 BoogieIcfgContainer [2021-08-21 12:00:51,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:00:51,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:00:51,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:00:51,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:00:51,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:00:50" (1/2) ... [2021-08-21 12:00:51,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e12936 and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:00:51, skipping insertion in model container [2021-08-21 12:00:51,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:00:51" (2/2) ... [2021-08-21 12:00:51,070 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-08-21 12:00:51,073 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:00:51,073 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:00:51,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:00:51,073 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:00:51,094 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:00:51,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:00:51,128 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:00:51,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:00:51,134 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-08-21 12:00:51,159 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2021-08-21 12:00:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2021-08-21 12:00:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-21 12:00:51,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:51,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:51,166 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:51,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1674208439, now seen corresponding path program 1 times [2021-08-21 12:00:51,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:51,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226338165] [2021-08-21 12:00:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:51,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:51,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:51,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226338165] [2021-08-21 12:00:51,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226338165] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:00:51,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:00:51,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:00:51,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160741850] [2021-08-21 12:00:51,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:00:51,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:00:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:00:51,295 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:51,309 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-08-21 12:00:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:00:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-21 12:00:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:51,318 INFO L225 Difference]: With dead ends: 22 [2021-08-21 12:00:51,318 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 12:00:51,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:00:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 12:00:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 12:00:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-08-21 12:00:51,340 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-08-21 12:00:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:51,342 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-08-21 12:00:51,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-08-21 12:00:51,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 12:00:51,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:51,344 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:51,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:00:51,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:51,348 INFO L82 PathProgramCache]: Analyzing trace with hash 361579940, now seen corresponding path program 1 times [2021-08-21 12:00:51,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:51,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093566662] [2021-08-21 12:00:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:51,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:51,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:51,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093566662] [2021-08-21 12:00:51,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093566662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:00:51,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:00:51,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:00:51,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963081089] [2021-08-21 12:00:51,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:00:51,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:00:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:00:51,403 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:51,430 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2021-08-21 12:00:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:00:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 12:00:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:51,431 INFO L225 Difference]: With dead ends: 19 [2021-08-21 12:00:51,431 INFO L226 Difference]: Without dead ends: 15 [2021-08-21 12:00:51,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:00:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-21 12:00:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-21 12:00:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2021-08-21 12:00:51,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 10 [2021-08-21 12:00:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:51,435 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2021-08-21 12:00:51,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2021-08-21 12:00:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 12:00:51,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:51,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:51,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:00:51,436 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1024668018, now seen corresponding path program 1 times [2021-08-21 12:00:51,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:51,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391008010] [2021-08-21 12:00:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:51,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:51,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:51,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391008010] [2021-08-21 12:00:51,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391008010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:51,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756146672] [2021-08-21 12:00:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:51,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:51,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:51,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:00:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:51,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:00:51,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:51,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756146672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:51,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:51,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-21 12:00:51,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208904718] [2021-08-21 12:00:51,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:00:51,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:51,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:00:51,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:00:51,664 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:51,706 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2021-08-21 12:00:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:00:51,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 12:00:51,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:51,708 INFO L225 Difference]: With dead ends: 18 [2021-08-21 12:00:51,709 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 12:00:51,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:00:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 12:00:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 12:00:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-08-21 12:00:51,716 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-08-21 12:00:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:51,716 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-08-21 12:00:51,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-08-21 12:00:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 12:00:51,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:51,717 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:51,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 12:00:51,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:51,955 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:51,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1495291916, now seen corresponding path program 2 times [2021-08-21 12:00:51,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:51,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661302216] [2021-08-21 12:00:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:51,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:52,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:52,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661302216] [2021-08-21 12:00:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661302216] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:00:52,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:00:52,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:00:52,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734879411] [2021-08-21 12:00:52,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:00:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:00:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:00:52,012 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:52,037 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-08-21 12:00:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:00:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 12:00:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:52,038 INFO L225 Difference]: With dead ends: 20 [2021-08-21 12:00:52,038 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 12:00:52,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:00:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 12:00:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 12:00:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-08-21 12:00:52,045 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-08-21 12:00:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:52,046 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-08-21 12:00:52,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-08-21 12:00:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 12:00:52,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:52,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:52,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:00:52,050 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1700663369, now seen corresponding path program 1 times [2021-08-21 12:00:52,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:52,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293788558] [2021-08-21 12:00:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:52,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:52,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:52,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293788558] [2021-08-21 12:00:52,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293788558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:52,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892436236] [2021-08-21 12:00:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:52,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:52,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:52,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:00:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:52,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:00:52,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:52,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892436236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:52,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:52,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 12:00:52,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346826792] [2021-08-21 12:00:52,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:00:52,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:52,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:00:52,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:00:52,265 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:52,279 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-08-21 12:00:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:00:52,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 12:00:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:52,280 INFO L225 Difference]: With dead ends: 24 [2021-08-21 12:00:52,280 INFO L226 Difference]: Without dead ends: 24 [2021-08-21 12:00:52,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:00:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-21 12:00:52,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-21 12:00:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-08-21 12:00:52,282 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-08-21 12:00:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:52,282 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-08-21 12:00:52,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-08-21 12:00:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 12:00:52,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:52,283 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:52,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:52,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:52,497 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:52,498 INFO L82 PathProgramCache]: Analyzing trace with hash 262576708, now seen corresponding path program 2 times [2021-08-21 12:00:52,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:52,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198886254] [2021-08-21 12:00:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:52,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:52,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:52,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198886254] [2021-08-21 12:00:52,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198886254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:52,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029538046] [2021-08-21 12:00:52,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:52,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:52,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:52,570 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:52,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:00:52,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:52,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:52,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:00:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:52,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029538046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:52,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:52,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 12:00:52,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288445304] [2021-08-21 12:00:52,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:00:52,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:00:52,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:00:52,717 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:52,750 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-08-21 12:00:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:00:52,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 12:00:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:52,779 INFO L225 Difference]: With dead ends: 28 [2021-08-21 12:00:52,779 INFO L226 Difference]: Without dead ends: 28 [2021-08-21 12:00:52,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:00:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-21 12:00:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-21 12:00:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-08-21 12:00:52,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-08-21 12:00:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:52,781 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-08-21 12:00:52,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-08-21 12:00:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 12:00:52,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:52,782 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:52,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:52,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:52,982 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:52,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1368436823, now seen corresponding path program 3 times [2021-08-21 12:00:52,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:52,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854565807] [2021-08-21 12:00:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:52,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:53,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:53,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854565807] [2021-08-21 12:00:53,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854565807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975324945] [2021-08-21 12:00:53,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:53,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:53,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:53,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:53,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:00:53,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:00:53,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:53,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:00:53,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:53,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975324945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:53,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 12:00:53,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52642528] [2021-08-21 12:00:53,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:53,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:53,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:53,218 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:53,262 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-08-21 12:00:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:00:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 12:00:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:53,265 INFO L225 Difference]: With dead ends: 32 [2021-08-21 12:00:53,265 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 12:00:53,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 12:00:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-21 12:00:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-08-21 12:00:53,271 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-08-21 12:00:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:53,272 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-08-21 12:00:53,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-08-21 12:00:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 12:00:53,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:53,273 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:53,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:53,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:53,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:53,489 INFO L82 PathProgramCache]: Analyzing trace with hash -390248732, now seen corresponding path program 4 times [2021-08-21 12:00:53,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:53,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293431319] [2021-08-21 12:00:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:53,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:53,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:53,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293431319] [2021-08-21 12:00:53,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293431319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725422156] [2021-08-21 12:00:53,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:53,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:53,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:53,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:53,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:00:53,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:53,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:00:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:53,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725422156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:53,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 12:00:53,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444018336] [2021-08-21 12:00:53,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:53,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:53,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:53,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:53,813 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:53,857 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-08-21 12:00:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:00:53,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 12:00:53,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:53,861 INFO L225 Difference]: With dead ends: 36 [2021-08-21 12:00:53,861 INFO L226 Difference]: Without dead ends: 36 [2021-08-21 12:00:53,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-21 12:00:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-21 12:00:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-08-21 12:00:53,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-08-21 12:00:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:53,863 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-08-21 12:00:53,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-08-21 12:00:53,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:00:53,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:53,865 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:53,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:54,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:54,066 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash -131188983, now seen corresponding path program 5 times [2021-08-21 12:00:54,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:54,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520276804] [2021-08-21 12:00:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:54,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:54,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:54,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520276804] [2021-08-21 12:00:54,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520276804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:54,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688202861] [2021-08-21 12:00:54,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:54,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:54,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:54,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:54,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:00:54,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:54,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:54,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:00:54,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:54,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:54,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-21 12:00:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:54,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688202861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:54,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:54,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 12:00:54,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372931336] [2021-08-21 12:00:54,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:00:54,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:54,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:00:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:54,729 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:54,804 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-08-21 12:00:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:00:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:54,805 INFO L225 Difference]: With dead ends: 93 [2021-08-21 12:00:54,805 INFO L226 Difference]: Without dead ends: 90 [2021-08-21 12:00:54,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-21 12:00:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-08-21 12:00:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 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) [2021-08-21 12:00:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-08-21 12:00:54,818 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-08-21 12:00:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:54,818 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-08-21 12:00:54,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:54,818 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-08-21 12:00:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:00:54,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:54,819 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:54,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 12:00:55,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:55,034 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash -277447531, now seen corresponding path program 6 times [2021-08-21 12:00:55,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:55,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753591453] [2021-08-21 12:00:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:55,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:55,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:55,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753591453] [2021-08-21 12:00:55,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753591453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:55,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696820906] [2021-08-21 12:00:55,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:55,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:55,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:55,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:55,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:00:55,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:00:55,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:55,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:55,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-21 12:00:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:55,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696820906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:55,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:55,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 12:00:55,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227737126] [2021-08-21 12:00:55,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:00:55,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:00:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:55,366 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:55,451 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-08-21 12:00:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:55,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:00:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:55,452 INFO L225 Difference]: With dead ends: 103 [2021-08-21 12:00:55,452 INFO L226 Difference]: Without dead ends: 100 [2021-08-21 12:00:55,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-21 12:00:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-08-21 12:00:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-08-21 12:00:55,457 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-08-21 12:00:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:55,457 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-08-21 12:00:55,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-08-21 12:00:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:00:55,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:55,458 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:55,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:55,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:55,677 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1211957465, now seen corresponding path program 7 times [2021-08-21 12:00:55,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:55,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268564955] [2021-08-21 12:00:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:55,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:55,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:55,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268564955] [2021-08-21 12:00:55,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268564955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:55,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106926235] [2021-08-21 12:00:55,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:55,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:55,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:55,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:55,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:00:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:55,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:00:55,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:55,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:55,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-21 12:00:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:56,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106926235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:56,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:56,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 12:00:56,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962214648] [2021-08-21 12:00:56,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:00:56,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:56,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:00:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:56,123 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:56,191 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-08-21 12:00:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:56,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:00:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:56,193 INFO L225 Difference]: With dead ends: 113 [2021-08-21 12:00:56,193 INFO L226 Difference]: Without dead ends: 110 [2021-08-21 12:00:56,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-21 12:00:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-08-21 12:00:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-08-21 12:00:56,196 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-08-21 12:00:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:56,196 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-08-21 12:00:56,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-08-21 12:00:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:00:56,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:56,197 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:56,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:56,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 12:00:56,414 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:56,414 INFO L82 PathProgramCache]: Analyzing trace with hash 138872085, now seen corresponding path program 8 times [2021-08-21 12:00:56,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:56,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107608776] [2021-08-21 12:00:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:56,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:56,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:56,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107608776] [2021-08-21 12:00:56,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107608776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:56,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432691326] [2021-08-21 12:00:56,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:56,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:56,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:56,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:56,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:00:56,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:56,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:56,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:00:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:56,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:56,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-21 12:00:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:56,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432691326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:56,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:56,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 12:00:56,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015519318] [2021-08-21 12:00:56,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:00:56,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:56,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:00:56,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:56,839 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:56,914 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-08-21 12:00:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:56,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:00:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:56,915 INFO L225 Difference]: With dead ends: 124 [2021-08-21 12:00:56,916 INFO L226 Difference]: Without dead ends: 121 [2021-08-21 12:00:56,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-21 12:00:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-08-21 12:00:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 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) [2021-08-21 12:00:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-08-21 12:00:56,918 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-08-21 12:00:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:56,919 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-08-21 12:00:56,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-08-21 12:00:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:00:56,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:56,919 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:56,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:57,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:57,136 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1232963673, now seen corresponding path program 9 times [2021-08-21 12:00:57,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:57,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975336957] [2021-08-21 12:00:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:57,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:57,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:57,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975336957] [2021-08-21 12:00:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975336957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:57,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186858109] [2021-08-21 12:00:57,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:57,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:57,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:57,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:00:57,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:00:57,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:57,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:57,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-21 12:00:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:57,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186858109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:57,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:57,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 12:00:57,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6716593] [2021-08-21 12:00:57,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:00:57,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:57,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:00:57,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:57,655 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:57,747 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-08-21 12:00:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:00:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:57,748 INFO L225 Difference]: With dead ends: 136 [2021-08-21 12:00:57,748 INFO L226 Difference]: Without dead ends: 133 [2021-08-21 12:00:57,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-21 12:00:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-08-21 12:00:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-08-21 12:00:57,751 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-08-21 12:00:57,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:57,751 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-08-21 12:00:57,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-08-21 12:00:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 12:00:57,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:57,752 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:57,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:57,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:00:57,961 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash 790064533, now seen corresponding path program 10 times [2021-08-21 12:00:57,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:57,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821577859] [2021-08-21 12:00:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:57,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:58,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:58,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821577859] [2021-08-21 12:00:58,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821577859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:58,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380437023] [2021-08-21 12:00:58,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:58,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:58,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:58,008 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:58,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:00:58,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:58,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:58,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:00:58,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:58,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:00:58,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-08-21 12:00:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:58,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380437023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:58,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:58,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 12:00:58,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952262337] [2021-08-21 12:00:58,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:00:58,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:58,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:00:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:58,483 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:58,566 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-08-21 12:00:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:58,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 12:00:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:58,568 INFO L225 Difference]: With dead ends: 149 [2021-08-21 12:00:58,568 INFO L226 Difference]: Without dead ends: 146 [2021-08-21 12:00:58,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-21 12:00:58,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-08-21 12:00:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-08-21 12:00:58,572 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-08-21 12:00:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:58,573 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-08-21 12:00:58,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-08-21 12:00:58,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:00:58,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:58,574 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:58,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:58,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:00:58,793 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 228834706, now seen corresponding path program 11 times [2021-08-21 12:00:58,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:58,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081736327] [2021-08-21 12:00:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:58,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:58,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:58,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081736327] [2021-08-21 12:00:58,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081736327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:58,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210583873] [2021-08-21 12:00:58,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:58,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:58,857 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:58,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:00:58,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:00:58,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:59,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210583873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:59,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:59,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:00:59,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282298189] [2021-08-21 12:00:59,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:59,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:59,031 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:59,190 INFO L93 Difference]: Finished difference Result 201 states and 451 transitions. [2021-08-21 12:00:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:00:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:00:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:59,192 INFO L225 Difference]: With dead ends: 201 [2021-08-21 12:00:59,192 INFO L226 Difference]: Without dead ends: 196 [2021-08-21 12:00:59,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:00:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-21 12:00:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 117. [2021-08-21 12:00:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.8879310344827585) internal successors, (335), 116 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 335 transitions. [2021-08-21 12:00:59,202 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 335 transitions. Word has length 16 [2021-08-21 12:00:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:59,203 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 335 transitions. [2021-08-21 12:00:59,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 335 transitions. [2021-08-21 12:00:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:00:59,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:59,207 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:59,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:59,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:00:59,430 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:59,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:59,430 INFO L82 PathProgramCache]: Analyzing trace with hash -690271356, now seen corresponding path program 12 times [2021-08-21 12:00:59,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:59,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777500187] [2021-08-21 12:00:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:59,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:59,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:59,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777500187] [2021-08-21 12:00:59,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777500187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:59,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960626254] [2021-08-21 12:00:59,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:59,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:59,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:59,488 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:00:59,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:00:59,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:00:59,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:00:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:59,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960626254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:59,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:59,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:00:59,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828494744] [2021-08-21 12:00:59,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:59,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:59,647 INFO L87 Difference]: Start difference. First operand 117 states and 335 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:59,732 INFO L93 Difference]: Finished difference Result 194 states and 437 transitions. [2021-08-21 12:00:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:59,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:00:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:59,733 INFO L225 Difference]: With dead ends: 194 [2021-08-21 12:00:59,733 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 12:00:59,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:00:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 12:00:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2021-08-21 12:00:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-08-21 12:00:59,736 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-08-21 12:00:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:59,736 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-08-21 12:00:59,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-08-21 12:00:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:00:59,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:59,737 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:59,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:59,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:00:59,953 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:59,954 INFO L82 PathProgramCache]: Analyzing trace with hash 72393506, now seen corresponding path program 13 times [2021-08-21 12:00:59,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:59,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781451398] [2021-08-21 12:00:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:59,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:59,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:59,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781451398] [2021-08-21 12:00:59,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781451398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:59,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791417465] [2021-08-21 12:00:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:59,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:59,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:00,000 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:00,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:01:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:00,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:00,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791417465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:00,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:00,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585442456] [2021-08-21 12:01:00,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:00,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:00,142 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:00,212 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-08-21 12:01:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:00,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:00,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:00,213 INFO L225 Difference]: With dead ends: 152 [2021-08-21 12:01:00,213 INFO L226 Difference]: Without dead ends: 151 [2021-08-21 12:01:00,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:00,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-21 12:01:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-08-21 12:01:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-08-21 12:01:00,216 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-08-21 12:01:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:00,216 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-08-21 12:01:00,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-08-21 12:01:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:00,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:00,217 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:00,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:00,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:00,433 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash 938477458, now seen corresponding path program 14 times [2021-08-21 12:01:00,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:00,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29199158] [2021-08-21 12:01:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:00,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:00,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:00,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29199158] [2021-08-21 12:01:00,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29199158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284131315] [2021-08-21 12:01:00,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:00,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:00,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:00,484 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:00,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:01:00,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:00,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:00,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:00,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284131315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:00,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:00,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837995071] [2021-08-21 12:01:00,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:00,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:00,693 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:00,736 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-08-21 12:01:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:00,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:00,738 INFO L225 Difference]: With dead ends: 214 [2021-08-21 12:01:00,738 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 12:01:00,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 12:01:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-08-21 12:01:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-08-21 12:01:00,760 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-08-21 12:01:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:00,760 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-08-21 12:01:00,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-08-21 12:01:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:00,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:00,761 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:00,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:00,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:01:00,979 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash -10212986, now seen corresponding path program 15 times [2021-08-21 12:01:00,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:00,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586382031] [2021-08-21 12:01:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:00,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:01,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:01,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586382031] [2021-08-21 12:01:01,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586382031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:01,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387994562] [2021-08-21 12:01:01,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:01,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:01,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:01,035 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:01,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:01:01,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:01,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:01,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387994562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:01,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:01,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:01,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718989288] [2021-08-21 12:01:01,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:01,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:01,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:01,194 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:01,289 INFO L93 Difference]: Finished difference Result 219 states and 493 transitions. [2021-08-21 12:01:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:01,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:01,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:01,290 INFO L225 Difference]: With dead ends: 219 [2021-08-21 12:01:01,290 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 12:01:01,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:01,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 12:01:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 133. [2021-08-21 12:01:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8636363636363638) internal successors, (378), 132 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) [2021-08-21 12:01:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 378 transitions. [2021-08-21 12:01:01,294 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 378 transitions. Word has length 16 [2021-08-21 12:01:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:01,294 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 378 transitions. [2021-08-21 12:01:01,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 378 transitions. [2021-08-21 12:01:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:01,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:01,296 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:01,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:01,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:01,510 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash 652875092, now seen corresponding path program 16 times [2021-08-21 12:01:01,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:01,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652696423] [2021-08-21 12:01:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:01,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:01,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:01,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652696423] [2021-08-21 12:01:01,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652696423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:01,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201616814] [2021-08-21 12:01:01,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:01,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:01,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:01,571 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:01,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:01:01,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:01,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:01,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:01,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201616814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:01,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:01,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:01,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616483131] [2021-08-21 12:01:01,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:01,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:01,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:01,739 INFO L87 Difference]: Start difference. First operand 133 states and 378 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:01,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:01,811 INFO L93 Difference]: Finished difference Result 218 states and 498 transitions. [2021-08-21 12:01:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:01:01,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:01,812 INFO L225 Difference]: With dead ends: 218 [2021-08-21 12:01:01,812 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 12:01:01,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 12:01:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2021-08-21 12:01:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-08-21 12:01:01,816 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-08-21 12:01:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:01,816 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-08-21 12:01:01,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-08-21 12:01:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:01,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:01,816 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:01,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:02,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:02,033 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:02,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1561798502, now seen corresponding path program 17 times [2021-08-21 12:01:02,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:02,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893748420] [2021-08-21 12:01:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:02,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:02,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893748420] [2021-08-21 12:01:02,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893748420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83896885] [2021-08-21 12:01:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:02,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:02,117 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:02,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:01:02,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:01:02,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:02,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:02,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83896885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:02,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:02,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343317458] [2021-08-21 12:01:02,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:02,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:02,302 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:02,387 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-08-21 12:01:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:02,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:02,389 INFO L225 Difference]: With dead ends: 206 [2021-08-21 12:01:02,389 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 12:01:02,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 12:01:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-08-21 12:01:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-08-21 12:01:02,392 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-08-21 12:01:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:02,392 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-08-21 12:01:02,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-08-21 12:01:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:02,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:02,393 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:02,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:02,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:02,610 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:02,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1867084842, now seen corresponding path program 18 times [2021-08-21 12:01:02,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:02,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823160797] [2021-08-21 12:01:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:02,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:02,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:02,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823160797] [2021-08-21 12:01:02,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823160797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845512610] [2021-08-21 12:01:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:02,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:02,669 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:02,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:01:02,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:02,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845512610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:02,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:02,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:02,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466336502] [2021-08-21 12:01:02,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:02,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:02,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:02,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:02,818 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:02,854 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-08-21 12:01:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:02,855 INFO L225 Difference]: With dead ends: 231 [2021-08-21 12:01:02,855 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 12:01:02,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 12:01:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-08-21 12:01:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-08-21 12:01:02,858 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-08-21 12:01:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:02,858 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-08-21 12:01:02,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-08-21 12:01:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:02,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:02,859 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:02,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:03,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:03,079 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1877862140, now seen corresponding path program 19 times [2021-08-21 12:01:03,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:03,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744850676] [2021-08-21 12:01:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:03,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:03,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:03,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744850676] [2021-08-21 12:01:03,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744850676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:03,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983567267] [2021-08-21 12:01:03,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:03,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:03,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:03,125 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:03,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:01:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:03,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:03,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983567267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:03,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:03,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:03,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099170073] [2021-08-21 12:01:03,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:03,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:03,323 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:03,431 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-08-21 12:01:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:01:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:03,432 INFO L225 Difference]: With dead ends: 181 [2021-08-21 12:01:03,432 INFO L226 Difference]: Without dead ends: 179 [2021-08-21 12:01:03,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-21 12:01:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-08-21 12:01:03,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-08-21 12:01:03,435 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-08-21 12:01:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:03,436 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-08-21 12:01:03,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-08-21 12:01:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:03,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:03,436 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:03,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 12:01:03,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 12:01:03,654 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash -156471534, now seen corresponding path program 20 times [2021-08-21 12:01:03,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:03,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688393442] [2021-08-21 12:01:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:03,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:03,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:03,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688393442] [2021-08-21 12:01:03,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688393442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:03,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638630270] [2021-08-21 12:01:03,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:03,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:03,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:03,701 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:03,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:01:03,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:03,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:03,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:03,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:03,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638630270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:03,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:03,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:03,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240071148] [2021-08-21 12:01:03,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:03,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:03,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:03,889 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:03,944 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-08-21 12:01:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:03,946 INFO L225 Difference]: With dead ends: 248 [2021-08-21 12:01:03,946 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 12:01:03,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 12:01:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-08-21 12:01:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-08-21 12:01:03,949 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-08-21 12:01:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:03,949 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-08-21 12:01:03,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-08-21 12:01:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:03,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:03,950 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:03,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:04,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 12:01:04,167 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1083298366, now seen corresponding path program 21 times [2021-08-21 12:01:04,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:04,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124325005] [2021-08-21 12:01:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:04,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:04,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:04,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124325005] [2021-08-21 12:01:04,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124325005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:04,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491443206] [2021-08-21 12:01:04,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:04,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:04,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:04,212 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:04,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:01:04,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:04,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:04,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:04,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:04,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491443206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:04,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:04,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:04,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360858535] [2021-08-21 12:01:04,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:04,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:04,400 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:04,484 INFO L93 Difference]: Finished difference Result 234 states and 536 transitions. [2021-08-21 12:01:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:04,485 INFO L225 Difference]: With dead ends: 234 [2021-08-21 12:01:04,485 INFO L226 Difference]: Without dead ends: 232 [2021-08-21 12:01:04,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-21 12:01:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 149. [2021-08-21 12:01:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.8783783783783785) internal successors, (426), 148 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 426 transitions. [2021-08-21 12:01:04,488 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 426 transitions. Word has length 16 [2021-08-21 12:01:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:04,488 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 426 transitions. [2021-08-21 12:01:04,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 426 transitions. [2021-08-21 12:01:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:04,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:04,489 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:04,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:04,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:04,706 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:04,707 INFO L82 PathProgramCache]: Analyzing trace with hash -420210288, now seen corresponding path program 22 times [2021-08-21 12:01:04,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:04,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055878557] [2021-08-21 12:01:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:04,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:04,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:04,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055878557] [2021-08-21 12:01:04,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055878557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:04,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280146811] [2021-08-21 12:01:04,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:04,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:04,764 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:04,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:01:04,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:04,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:04,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280146811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:04,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:04,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:04,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247021782] [2021-08-21 12:01:04,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:04,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:04,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:04,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:04,972 INFO L87 Difference]: Start difference. First operand 149 states and 426 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:05,025 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2021-08-21 12:01:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:01:05,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:05,026 INFO L225 Difference]: With dead ends: 239 [2021-08-21 12:01:05,026 INFO L226 Difference]: Without dead ends: 239 [2021-08-21 12:01:05,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-21 12:01:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 155. [2021-08-21 12:01:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-08-21 12:01:05,035 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-08-21 12:01:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:05,035 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-08-21 12:01:05,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-08-21 12:01:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:05,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:05,037 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:05,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:05,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:05,254 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash 488713122, now seen corresponding path program 23 times [2021-08-21 12:01:05,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:05,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033546420] [2021-08-21 12:01:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:05,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:05,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:05,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033546420] [2021-08-21 12:01:05,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033546420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:05,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309044420] [2021-08-21 12:01:05,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:05,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:05,310 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:05,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:01:05,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:01:05,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:05,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:05,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309044420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:05,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:05,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:05,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100248090] [2021-08-21 12:01:05,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:05,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:05,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:05,509 INFO L87 Difference]: Start difference. First operand 155 states and 444 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:05,592 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-08-21 12:01:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:05,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:05,593 INFO L225 Difference]: With dead ends: 229 [2021-08-21 12:01:05,593 INFO L226 Difference]: Without dead ends: 228 [2021-08-21 12:01:05,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-08-21 12:01:05,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-08-21 12:01:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-08-21 12:01:05,597 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-08-21 12:01:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:05,597 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-08-21 12:01:05,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-08-21 12:01:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:05,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:05,597 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:05,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:05,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:01:05,812 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:05,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1354797074, now seen corresponding path program 24 times [2021-08-21 12:01:05,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:05,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653449691] [2021-08-21 12:01:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:05,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:05,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:05,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653449691] [2021-08-21 12:01:05,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653449691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:05,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333109802] [2021-08-21 12:01:05,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:05,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:05,873 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:05,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:01:06,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:06,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:06,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333109802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:06,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:06,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:06,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642891477] [2021-08-21 12:01:06,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:06,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:06,088 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:06,138 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-08-21 12:01:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:06,141 INFO L225 Difference]: With dead ends: 244 [2021-08-21 12:01:06,141 INFO L226 Difference]: Without dead ends: 244 [2021-08-21 12:01:06,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-21 12:01:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-08-21 12:01:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-08-21 12:01:06,148 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-08-21 12:01:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:06,148 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-08-21 12:01:06,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-08-21 12:01:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:06,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:06,149 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:06,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:06,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:01:06,366 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:06,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1344019776, now seen corresponding path program 25 times [2021-08-21 12:01:06,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:06,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775138511] [2021-08-21 12:01:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:06,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:06,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:06,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775138511] [2021-08-21 12:01:06,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775138511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:06,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966515589] [2021-08-21 12:01:06,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:06,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:06,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:06,441 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:06,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:01:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:06,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966515589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:06,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:06,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:06,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302451866] [2021-08-21 12:01:06,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:06,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:06,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:06,704 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:06,830 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-08-21 12:01:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:01:06,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:06,832 INFO L225 Difference]: With dead ends: 234 [2021-08-21 12:01:06,832 INFO L226 Difference]: Without dead ends: 232 [2021-08-21 12:01:06,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:06,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-21 12:01:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-08-21 12:01:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-08-21 12:01:06,841 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-08-21 12:01:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:06,841 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-08-21 12:01:06,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-08-21 12:01:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:06,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:06,842 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:06,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:07,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:01:07,059 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:07,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1229556914, now seen corresponding path program 26 times [2021-08-21 12:01:07,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:07,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008836500] [2021-08-21 12:01:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:07,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:07,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:07,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008836500] [2021-08-21 12:01:07,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008836500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:07,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634114185] [2021-08-21 12:01:07,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:07,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:07,114 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:07,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:01:07,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:07,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:07,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634114185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:07,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:07,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:07,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548320776] [2021-08-21 12:01:07,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:07,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:07,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:07,354 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:07,456 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-08-21 12:01:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:07,469 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:07,470 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:01:07,470 INFO L226 Difference]: Without dead ends: 257 [2021-08-21 12:01:07,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-21 12:01:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-08-21 12:01:07,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-08-21 12:01:07,474 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-08-21 12:01:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:07,474 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-08-21 12:01:07,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-08-21 12:01:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:07,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:07,475 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:07,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:07,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,676 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:07,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2088722274, now seen corresponding path program 27 times [2021-08-21 12:01:07,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:07,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997408307] [2021-08-21 12:01:07,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:07,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:07,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:07,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997408307] [2021-08-21 12:01:07,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997408307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:07,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600910296] [2021-08-21 12:01:07,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:07,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:07,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:07,735 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:07,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:01:07,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:07,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:01:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:08,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600910296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:08,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:08,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-08-21 12:01:08,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424953869] [2021-08-21 12:01:08,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:08,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:08,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:08,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:08,056 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:08,432 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-08-21 12:01:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:01:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:08,433 INFO L225 Difference]: With dead ends: 265 [2021-08-21 12:01:08,433 INFO L226 Difference]: Without dead ends: 262 [2021-08-21 12:01:08,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:01:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-08-21 12:01:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-08-21 12:01:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-08-21 12:01:08,444 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-08-21 12:01:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:08,444 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-08-21 12:01:08,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-08-21 12:01:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:08,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:08,445 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:08,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:08,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:08,661 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:08,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash 259848082, now seen corresponding path program 28 times [2021-08-21 12:01:08,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:08,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987938435] [2021-08-21 12:01:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:08,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:08,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:08,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987938435] [2021-08-21 12:01:08,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987938435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:08,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119739874] [2021-08-21 12:01:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:08,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:08,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:08,714 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:08,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:01:08,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:08,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:08,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:08,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119739874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:08,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:08,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:08,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143181828] [2021-08-21 12:01:08,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:08,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:08,946 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:09,032 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-08-21 12:01:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:09,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:09,054 INFO L225 Difference]: With dead ends: 353 [2021-08-21 12:01:09,054 INFO L226 Difference]: Without dead ends: 353 [2021-08-21 12:01:09,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-21 12:01:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-08-21 12:01:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-08-21 12:01:09,060 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-08-21 12:01:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:09,060 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-08-21 12:01:09,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-08-21 12:01:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:09,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:09,061 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:09,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:09,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:09,276 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash 10793222, now seen corresponding path program 29 times [2021-08-21 12:01:09,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:09,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109088880] [2021-08-21 12:01:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:09,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:09,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:09,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109088880] [2021-08-21 12:01:09,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109088880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:09,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238871428] [2021-08-21 12:01:09,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:09,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:09,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:09,322 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:09,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:01:09,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:01:09,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:09,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:09,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:09,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238871428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:09,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:09,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:09,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584885870] [2021-08-21 12:01:09,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:09,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:09,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:09,553 INFO L87 Difference]: Start difference. First operand 215 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:09,648 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-08-21 12:01:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:09,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:09,649 INFO L225 Difference]: With dead ends: 342 [2021-08-21 12:01:09,649 INFO L226 Difference]: Without dead ends: 340 [2021-08-21 12:01:09,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-08-21 12:01:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-08-21 12:01:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-08-21 12:01:09,656 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-08-21 12:01:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:09,657 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-08-21 12:01:09,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-08-21 12:01:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:09,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:09,657 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:09,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:09,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 12:01:09,873 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1846078634, now seen corresponding path program 30 times [2021-08-21 12:01:09,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:09,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787678120] [2021-08-21 12:01:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:09,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:09,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:09,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787678120] [2021-08-21 12:01:09,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787678120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:09,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154887723] [2021-08-21 12:01:09,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:09,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:09,935 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:09,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:01:10,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:10,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:10,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:10,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:10,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154887723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:10,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:10,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:10,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902265149] [2021-08-21 12:01:10,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:10,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:10,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:10,168 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:10,206 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-08-21 12:01:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:10,213 INFO L225 Difference]: With dead ends: 348 [2021-08-21 12:01:10,213 INFO L226 Difference]: Without dead ends: 348 [2021-08-21 12:01:10,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-21 12:01:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-08-21 12:01:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-08-21 12:01:10,224 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-08-21 12:01:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:10,224 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-08-21 12:01:10,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-08-21 12:01:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:10,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:10,225 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:10,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:10,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:10,442 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:10,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:10,442 INFO L82 PathProgramCache]: Analyzing trace with hash -135465326, now seen corresponding path program 31 times [2021-08-21 12:01:10,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:10,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732299285] [2021-08-21 12:01:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:10,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:10,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:10,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732299285] [2021-08-21 12:01:10,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732299285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:10,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413512224] [2021-08-21 12:01:10,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:10,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:10,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:10,501 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:10,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:01:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:10,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:10,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413512224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:10,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:10,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:10,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676969440] [2021-08-21 12:01:10,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:10,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:10,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:10,756 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:10,831 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-08-21 12:01:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:10,832 INFO L225 Difference]: With dead ends: 362 [2021-08-21 12:01:10,832 INFO L226 Difference]: Without dead ends: 362 [2021-08-21 12:01:10,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-21 12:01:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-08-21 12:01:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-08-21 12:01:10,837 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-08-21 12:01:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:10,837 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-08-21 12:01:10,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-08-21 12:01:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:10,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:10,838 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:10,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:11,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:11,038 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1353939670, now seen corresponding path program 32 times [2021-08-21 12:01:11,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:11,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098062641] [2021-08-21 12:01:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:11,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:11,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:11,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098062641] [2021-08-21 12:01:11,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098062641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452789013] [2021-08-21 12:01:11,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:11,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:11,113 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:11,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:01:11,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:11,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:11,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:11,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452789013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:11,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:11,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232550081] [2021-08-21 12:01:11,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:11,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:11,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:11,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:11,368 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:11,430 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-08-21 12:01:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:11,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:11,431 INFO L225 Difference]: With dead ends: 346 [2021-08-21 12:01:11,431 INFO L226 Difference]: Without dead ends: 346 [2021-08-21 12:01:11,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-21 12:01:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-08-21 12:01:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-08-21 12:01:11,438 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-08-21 12:01:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:11,438 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-08-21 12:01:11,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-08-21 12:01:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:11,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:11,440 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:11,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:11,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:01:11,654 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:11,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:11,654 INFO L82 PathProgramCache]: Analyzing trace with hash 280854290, now seen corresponding path program 33 times [2021-08-21 12:01:11,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:11,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107841186] [2021-08-21 12:01:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:11,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:11,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:11,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107841186] [2021-08-21 12:01:11,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107841186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718542929] [2021-08-21 12:01:11,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:11,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:11,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:11,710 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:11,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:01:11,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:11,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718542929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:11,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:11,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434498815] [2021-08-21 12:01:11,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:11,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:11,975 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:12,094 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-08-21 12:01:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:01:12,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:12,095 INFO L225 Difference]: With dead ends: 402 [2021-08-21 12:01:12,096 INFO L226 Difference]: Without dead ends: 402 [2021-08-21 12:01:12,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-21 12:01:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-08-21 12:01:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-08-21 12:01:12,101 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-08-21 12:01:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:12,102 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-08-21 12:01:12,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-08-21 12:01:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:12,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:12,102 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:12,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:12,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:01:12,319 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:12,320 INFO L82 PathProgramCache]: Analyzing trace with hash -432105918, now seen corresponding path program 34 times [2021-08-21 12:01:12,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:12,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340036084] [2021-08-21 12:01:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:12,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:12,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:12,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340036084] [2021-08-21 12:01:12,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340036084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:12,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135834523] [2021-08-21 12:01:12,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:12,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:12,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:12,383 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:12,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:01:12,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:12,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:12,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135834523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:12,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:12,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:12,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177107416] [2021-08-21 12:01:12,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:12,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:12,637 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:12,729 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-08-21 12:01:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:12,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:12,731 INFO L225 Difference]: With dead ends: 396 [2021-08-21 12:01:12,731 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 12:01:12,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 12:01:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-08-21 12:01:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-08-21 12:01:12,737 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-08-21 12:01:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:12,737 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-08-21 12:01:12,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-08-21 12:01:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:12,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:12,738 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:12,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:12,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:01:12,953 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:12,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2005989522, now seen corresponding path program 35 times [2021-08-21 12:01:12,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:12,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400660284] [2021-08-21 12:01:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:12,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:13,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:13,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400660284] [2021-08-21 12:01:13,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400660284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:13,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842637335] [2021-08-21 12:01:13,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:13,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:13,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:13,006 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:13,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:01:13,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:13,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:13,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:13,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842637335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:13,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:13,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:13,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440888678] [2021-08-21 12:01:13,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:13,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:13,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:13,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:13,280 INFO L87 Difference]: Start difference. First operand 292 states and 868 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:13,309 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-08-21 12:01:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:13,311 INFO L225 Difference]: With dead ends: 394 [2021-08-21 12:01:13,311 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 12:01:13,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 12:01:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-08-21 12:01:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-08-21 12:01:13,317 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-08-21 12:01:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:13,317 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-08-21 12:01:13,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-08-21 12:01:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:13,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:13,318 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:13,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:13,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:01:13,534 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash -578364466, now seen corresponding path program 36 times [2021-08-21 12:01:13,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:13,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595412278] [2021-08-21 12:01:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:13,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:13,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:13,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595412278] [2021-08-21 12:01:13,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595412278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:13,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728603253] [2021-08-21 12:01:13,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:13,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:13,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:13,598 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:13,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:01:13,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:13,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:13,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:13,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:13,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728603253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:13,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:13,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:13,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772153783] [2021-08-21 12:01:13,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:13,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:13,924 INFO L87 Difference]: Start difference. First operand 290 states and 860 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:14,001 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-08-21 12:01:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:14,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:14,003 INFO L225 Difference]: With dead ends: 402 [2021-08-21 12:01:14,003 INFO L226 Difference]: Without dead ends: 402 [2021-08-21 12:01:14,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-21 12:01:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-08-21 12:01:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-08-21 12:01:14,008 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-08-21 12:01:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:14,008 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-08-21 12:01:14,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-08-21 12:01:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:14,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:14,008 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:14,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:14,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:01:14,229 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:14,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:14,229 INFO L82 PathProgramCache]: Analyzing trace with hash 911040530, now seen corresponding path program 37 times [2021-08-21 12:01:14,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:14,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162503496] [2021-08-21 12:01:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:14,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:14,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:14,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162503496] [2021-08-21 12:01:14,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162503496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:14,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944500873] [2021-08-21 12:01:14,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:14,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:14,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:14,274 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:14,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:01:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:14,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944500873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:14,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:14,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:14,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067007221] [2021-08-21 12:01:14,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:14,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:14,486 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:14,558 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-08-21 12:01:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:14,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:14,559 INFO L225 Difference]: With dead ends: 379 [2021-08-21 12:01:14,559 INFO L226 Difference]: Without dead ends: 379 [2021-08-21 12:01:14,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-21 12:01:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-08-21 12:01:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-08-21 12:01:14,564 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-08-21 12:01:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:14,564 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-08-21 12:01:14,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-08-21 12:01:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:14,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:14,565 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:14,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:14,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 12:01:14,781 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash -162044850, now seen corresponding path program 38 times [2021-08-21 12:01:14,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:14,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327446883] [2021-08-21 12:01:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:14,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:14,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:14,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327446883] [2021-08-21 12:01:14,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327446883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:14,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703631781] [2021-08-21 12:01:14,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:14,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:14,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:14,825 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:14,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:01:15,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:15,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:15,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:15,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703631781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:15,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:15,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:15,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163107795] [2021-08-21 12:01:15,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:15,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:15,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:15,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:15,115 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:15,216 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-08-21 12:01:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:01:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:15,218 INFO L225 Difference]: With dead ends: 381 [2021-08-21 12:01:15,218 INFO L226 Difference]: Without dead ends: 381 [2021-08-21 12:01:15,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-21 12:01:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-08-21 12:01:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-08-21 12:01:15,223 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-08-21 12:01:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:15,223 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-08-21 12:01:15,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-08-21 12:01:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:15,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:15,224 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:15,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:15,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 12:01:15,440 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:15,441 INFO L82 PathProgramCache]: Analyzing trace with hash 932046738, now seen corresponding path program 39 times [2021-08-21 12:01:15,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:15,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761236115] [2021-08-21 12:01:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:15,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:15,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:15,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761236115] [2021-08-21 12:01:15,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761236115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:15,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59736759] [2021-08-21 12:01:15,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:15,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:15,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:15,489 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:15,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:01:15,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:15,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:15,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:15,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:15,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59736759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:15,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:15,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:15,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301793789] [2021-08-21 12:01:15,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:15,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:15,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:15,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:15,774 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:15,915 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-08-21 12:01:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:01:15,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:15,917 INFO L225 Difference]: With dead ends: 438 [2021-08-21 12:01:15,917 INFO L226 Difference]: Without dead ends: 438 [2021-08-21 12:01:15,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-21 12:01:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-08-21 12:01:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-08-21 12:01:15,922 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-08-21 12:01:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:15,922 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-08-21 12:01:15,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-08-21 12:01:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:15,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:15,922 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:15,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:16,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 12:01:16,139 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:16,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1277077370, now seen corresponding path program 40 times [2021-08-21 12:01:16,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:16,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486749750] [2021-08-21 12:01:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:16,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:16,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:16,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486749750] [2021-08-21 12:01:16,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486749750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:16,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425947771] [2021-08-21 12:01:16,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:16,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:16,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:16,192 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:16,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:01:16,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:16,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:16,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:16,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425947771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:16,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:16,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:16,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270547754] [2021-08-21 12:01:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:16,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:16,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:16,493 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:16,582 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-08-21 12:01:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:16,584 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:01:16,584 INFO L226 Difference]: Without dead ends: 444 [2021-08-21 12:01:16,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-21 12:01:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-08-21 12:01:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-08-21 12:01:16,589 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-08-21 12:01:16,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:16,590 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-08-21 12:01:16,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-08-21 12:01:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:16,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:16,590 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:16,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:16,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:16,804 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1161018070, now seen corresponding path program 41 times [2021-08-21 12:01:16,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:16,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165051702] [2021-08-21 12:01:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:16,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:16,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:16,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165051702] [2021-08-21 12:01:16,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165051702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:16,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382428334] [2021-08-21 12:01:16,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:16,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:16,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:16,869 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:16,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:01:17,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:17,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:17,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:17,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382428334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:17,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:17,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:17,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441952712] [2021-08-21 12:01:17,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:17,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:17,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:17,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:17,180 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:17,217 INFO L93 Difference]: Finished difference Result 431 states and 1124 transitions. [2021-08-21 12:01:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:01:17,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:17,219 INFO L225 Difference]: With dead ends: 431 [2021-08-21 12:01:17,219 INFO L226 Difference]: Without dead ends: 431 [2021-08-21 12:01:17,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-21 12:01:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 342. [2021-08-21 12:01:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-08-21 12:01:17,225 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-08-21 12:01:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:17,225 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-08-21 12:01:17,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-08-21 12:01:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:17,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:17,226 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:17,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:17,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:17,443 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:17,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1423335918, now seen corresponding path program 42 times [2021-08-21 12:01:17,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:17,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041042541] [2021-08-21 12:01:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:17,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:17,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:17,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041042541] [2021-08-21 12:01:17,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041042541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:17,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90698668] [2021-08-21 12:01:17,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:17,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:17,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:17,495 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:17,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:01:17,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:01:17,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:17,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:17,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90698668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:17,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:17,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:17,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790531066] [2021-08-21 12:01:17,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:17,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:17,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:17,807 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:17,865 INFO L93 Difference]: Finished difference Result 435 states and 1129 transitions. [2021-08-21 12:01:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:17,867 INFO L225 Difference]: With dead ends: 435 [2021-08-21 12:01:17,867 INFO L226 Difference]: Without dead ends: 435 [2021-08-21 12:01:17,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-21 12:01:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 338. [2021-08-21 12:01:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-08-21 12:01:17,872 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-08-21 12:01:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:17,873 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-08-21 12:01:17,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-08-21 12:01:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:17,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:17,873 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:17,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:18,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 12:01:18,090 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash 66069078, now seen corresponding path program 43 times [2021-08-21 12:01:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:18,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202662949] [2021-08-21 12:01:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:18,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:18,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:18,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202662949] [2021-08-21 12:01:18,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202662949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:18,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058017645] [2021-08-21 12:01:18,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:18,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:18,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:18,136 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:18,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:01:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:18,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:18,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058017645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:18,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:18,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:18,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143372792] [2021-08-21 12:01:18,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:18,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:18,440 INFO L87 Difference]: Start difference. First operand 338 states and 1004 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:18,510 INFO L93 Difference]: Finished difference Result 409 states and 1090 transitions. [2021-08-21 12:01:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:18,512 INFO L225 Difference]: With dead ends: 409 [2021-08-21 12:01:18,512 INFO L226 Difference]: Without dead ends: 409 [2021-08-21 12:01:18,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-08-21 12:01:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 332. [2021-08-21 12:01:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-08-21 12:01:18,517 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-08-21 12:01:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:18,517 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-08-21 12:01:18,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-08-21 12:01:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:18,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:18,518 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:18,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:18,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:01:18,734 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1007016302, now seen corresponding path program 44 times [2021-08-21 12:01:18,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:18,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433091174] [2021-08-21 12:01:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:18,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:18,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:18,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433091174] [2021-08-21 12:01:18,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433091174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:18,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957087511] [2021-08-21 12:01:18,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:18,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:18,787 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:18,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:01:18,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:18,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:18,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:18,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:19,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957087511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:19,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:19,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:19,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563946933] [2021-08-21 12:01:19,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:19,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:19,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:19,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:19,040 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:19,123 INFO L93 Difference]: Finished difference Result 382 states and 1050 transitions. [2021-08-21 12:01:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:19,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:19,124 INFO L225 Difference]: With dead ends: 382 [2021-08-21 12:01:19,124 INFO L226 Difference]: Without dead ends: 382 [2021-08-21 12:01:19,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-21 12:01:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 325. [2021-08-21 12:01:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-08-21 12:01:19,130 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-08-21 12:01:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:19,130 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-08-21 12:01:19,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-08-21 12:01:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:19,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:19,130 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:19,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:19,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 12:01:19,348 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:19,349 INFO L82 PathProgramCache]: Analyzing trace with hash 87075286, now seen corresponding path program 45 times [2021-08-21 12:01:19,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:19,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081326308] [2021-08-21 12:01:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:19,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:19,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:19,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081326308] [2021-08-21 12:01:19,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081326308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:19,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417803320] [2021-08-21 12:01:19,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:19,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:19,413 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:19,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:01:19,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:01:19,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:19,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:19,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417803320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:19,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:19,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:19,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059691301] [2021-08-21 12:01:19,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:19,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:19,758 INFO L87 Difference]: Start difference. First operand 325 states and 962 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:19,844 INFO L93 Difference]: Finished difference Result 394 states and 1076 transitions. [2021-08-21 12:01:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:01:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:19,846 INFO L225 Difference]: With dead ends: 394 [2021-08-21 12:01:19,846 INFO L226 Difference]: Without dead ends: 394 [2021-08-21 12:01:19,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:19,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-21 12:01:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 320. [2021-08-21 12:01:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-08-21 12:01:19,855 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-08-21 12:01:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:19,855 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-08-21 12:01:19,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-08-21 12:01:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:01:19,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:19,856 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:19,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:20,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:20,073 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash -355823854, now seen corresponding path program 46 times [2021-08-21 12:01:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:20,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349032431] [2021-08-21 12:01:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:20,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:20,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:20,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349032431] [2021-08-21 12:01:20,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349032431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:20,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157650114] [2021-08-21 12:01:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:20,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:20,130 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:20,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:01:20,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:20,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:20,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:20,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157650114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:20,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:20,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:20,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005840189] [2021-08-21 12:01:20,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:20,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:20,521 INFO L87 Difference]: Start difference. First operand 320 states and 946 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:20,634 INFO L93 Difference]: Finished difference Result 443 states and 1208 transitions. [2021-08-21 12:01:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:01:20,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:01:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:20,636 INFO L225 Difference]: With dead ends: 443 [2021-08-21 12:01:20,636 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:01:20,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:01:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:01:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 317. [2021-08-21 12:01:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-08-21 12:01:20,643 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-08-21 12:01:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:20,643 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-08-21 12:01:20,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-08-21 12:01:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:20,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:20,644 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:20,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:20,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 12:01:20,860 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:20,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:20,860 INFO L82 PathProgramCache]: Analyzing trace with hash 79297781, now seen corresponding path program 47 times [2021-08-21 12:01:20,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:20,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32028515] [2021-08-21 12:01:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:20,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:20,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:20,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32028515] [2021-08-21 12:01:20,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32028515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:20,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420320124] [2021-08-21 12:01:20,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:20,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:20,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:20,927 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:20,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:01:21,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:21,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:21,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:21,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420320124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:21,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:21,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:21,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337004731] [2021-08-21 12:01:21,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:21,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:21,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:21,262 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:21,297 INFO L93 Difference]: Finished difference Result 414 states and 1097 transitions. [2021-08-21 12:01:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:01:21,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:01:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:21,299 INFO L225 Difference]: With dead ends: 414 [2021-08-21 12:01:21,299 INFO L226 Difference]: Without dead ends: 414 [2021-08-21 12:01:21,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-21 12:01:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-08-21 12:01:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.0062111801242235) internal successors, (968), 322 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 968 transitions. [2021-08-21 12:01:21,304 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 968 transitions. Word has length 17 [2021-08-21 12:01:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:21,304 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 968 transitions. [2021-08-21 12:01:21,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 968 transitions. [2021-08-21 12:01:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:21,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:21,305 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:21,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:21,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:21,522 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash 988221191, now seen corresponding path program 48 times [2021-08-21 12:01:21,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:21,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389579327] [2021-08-21 12:01:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:21,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:21,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:21,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389579327] [2021-08-21 12:01:21,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389579327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:21,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103193795] [2021-08-21 12:01:21,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:21,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:21,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:21,566 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:21,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:01:21,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:01:21,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:21,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:21,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:21,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103193795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:21,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:21,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:21,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837205001] [2021-08-21 12:01:21,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:21,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:21,931 INFO L87 Difference]: Start difference. First operand 323 states and 968 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:21,972 INFO L93 Difference]: Finished difference Result 417 states and 1096 transitions. [2021-08-21 12:01:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:21,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:01:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:21,973 INFO L225 Difference]: With dead ends: 417 [2021-08-21 12:01:21,973 INFO L226 Difference]: Without dead ends: 416 [2021-08-21 12:01:21,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-21 12:01:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 323. [2021-08-21 12:01:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.0031055900621118) internal successors, (967), 322 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 967 transitions. [2021-08-21 12:01:21,993 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 967 transitions. Word has length 17 [2021-08-21 12:01:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:21,993 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 967 transitions. [2021-08-21 12:01:21,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 967 transitions. [2021-08-21 12:01:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:21,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:21,994 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:22,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:22,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 12:01:22,216 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1843527845, now seen corresponding path program 49 times [2021-08-21 12:01:22,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:22,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627534225] [2021-08-21 12:01:22,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:22,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:22,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:22,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627534225] [2021-08-21 12:01:22,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627534225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:22,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507607390] [2021-08-21 12:01:22,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:22,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:22,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:22,265 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:22,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:01:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:22,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:22,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:22,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507607390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:22,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:22,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-21 12:01:22,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173293069] [2021-08-21 12:01:22,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:22,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:22,644 INFO L87 Difference]: Start difference. First operand 323 states and 967 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:22,751 INFO L93 Difference]: Finished difference Result 419 states and 1096 transitions. [2021-08-21 12:01:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:01:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 17 [2021-08-21 12:01:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:22,753 INFO L225 Difference]: With dead ends: 419 [2021-08-21 12:01:22,753 INFO L226 Difference]: Without dead ends: 417 [2021-08-21 12:01:22,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-21 12:01:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 323. [2021-08-21 12:01:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-08-21 12:01:22,758 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-08-21 12:01:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:22,758 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-08-21 12:01:22,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-08-21 12:01:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:22,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:22,759 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:22,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:22,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 12:01:22,976 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1706736953, now seen corresponding path program 50 times [2021-08-21 12:01:22,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:22,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328564683] [2021-08-21 12:01:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:22,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:23,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:23,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328564683] [2021-08-21 12:01:23,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328564683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:23,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810615675] [2021-08-21 12:01:23,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:23,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:23,031 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:23,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:01:23,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:23,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:23,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:23,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810615675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:23,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:23,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:01:23,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559652718] [2021-08-21 12:01:23,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:23,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:23,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:23,387 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:23,513 INFO L93 Difference]: Finished difference Result 424 states and 1101 transitions. [2021-08-21 12:01:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 17 [2021-08-21 12:01:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:23,515 INFO L225 Difference]: With dead ends: 424 [2021-08-21 12:01:23,516 INFO L226 Difference]: Without dead ends: 421 [2021-08-21 12:01:23,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:01:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-21 12:01:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 323. [2021-08-21 12:01:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9937888198757765) internal successors, (964), 322 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 964 transitions. [2021-08-21 12:01:23,523 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 964 transitions. Word has length 17 [2021-08-21 12:01:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:23,523 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 964 transitions. [2021-08-21 12:01:23,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 964 transitions. [2021-08-21 12:01:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:23,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:23,524 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:23,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:23,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:23,742 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash -95795995, now seen corresponding path program 51 times [2021-08-21 12:01:23,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:23,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267320443] [2021-08-21 12:01:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:23,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:23,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:23,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267320443] [2021-08-21 12:01:23,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267320443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:23,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938905155] [2021-08-21 12:01:23,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:23,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:23,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:23,798 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:23,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:01:24,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:24,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:24,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938905155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:24,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:24,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:24,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540942317] [2021-08-21 12:01:24,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:24,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:24,171 INFO L87 Difference]: Start difference. First operand 323 states and 964 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:24,264 INFO L93 Difference]: Finished difference Result 367 states and 1051 transitions. [2021-08-21 12:01:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17 [2021-08-21 12:01:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:24,266 INFO L225 Difference]: With dead ends: 367 [2021-08-21 12:01:24,266 INFO L226 Difference]: Without dead ends: 364 [2021-08-21 12:01:24,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-21 12:01:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-08-21 12:01:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-08-21 12:01:24,270 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-08-21 12:01:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:24,270 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-08-21 12:01:24,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-08-21 12:01:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:24,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:24,271 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:24,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:24,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:01:24,485 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1696233849, now seen corresponding path program 52 times [2021-08-21 12:01:24,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:24,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732226532] [2021-08-21 12:01:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:24,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:24,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:24,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732226532] [2021-08-21 12:01:24,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732226532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:24,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280039692] [2021-08-21 12:01:24,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:24,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:24,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:24,552 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:24,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:01:24,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:24,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:24,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280039692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:24,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:24,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:01:24,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539715422] [2021-08-21 12:01:24,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:24,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:24,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:24,919 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:24,990 INFO L93 Difference]: Finished difference Result 355 states and 1037 transitions. [2021-08-21 12:01:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 17 [2021-08-21 12:01:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:24,991 INFO L225 Difference]: With dead ends: 355 [2021-08-21 12:01:24,991 INFO L226 Difference]: Without dead ends: 351 [2021-08-21 12:01:24,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-21 12:01:24,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-08-21 12:01:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-08-21 12:01:24,996 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-08-21 12:01:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:24,996 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-08-21 12:01:24,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-08-21 12:01:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:24,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:24,996 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:25,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:25,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 12:01:25,213 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash -765673671, now seen corresponding path program 53 times [2021-08-21 12:01:25,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:25,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299286967] [2021-08-21 12:01:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:25,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:25,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:25,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299286967] [2021-08-21 12:01:25,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299286967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:25,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780499542] [2021-08-21 12:01:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:25,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:25,266 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:25,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:01:25,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:25,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:25,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:25,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:25,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780499542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:25,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:25,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:25,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057058884] [2021-08-21 12:01:25,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:25,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:25,576 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:25,615 INFO L93 Difference]: Finished difference Result 446 states and 1161 transitions. [2021-08-21 12:01:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:01:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:25,616 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:01:25,617 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 12:01:25,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 12:01:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 330. [2021-08-21 12:01:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0060790273556233) internal successors, (989), 329 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 989 transitions. [2021-08-21 12:01:25,624 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 989 transitions. Word has length 17 [2021-08-21 12:01:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:25,624 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 989 transitions. [2021-08-21 12:01:25,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 989 transitions. [2021-08-21 12:01:25,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:25,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:25,625 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:25,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:25,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:25,843 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:25,843 INFO L82 PathProgramCache]: Analyzing trace with hash 143249739, now seen corresponding path program 54 times [2021-08-21 12:01:25,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:25,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671539740] [2021-08-21 12:01:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:25,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:25,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:25,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671539740] [2021-08-21 12:01:25,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671539740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:25,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596024993] [2021-08-21 12:01:25,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:25,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:25,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:25,895 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:25,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:01:26,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:01:26,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:26,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596024993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:26,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:26,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:26,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444847788] [2021-08-21 12:01:26,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:26,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:26,278 INFO L87 Difference]: Start difference. First operand 330 states and 989 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:26,320 INFO L93 Difference]: Finished difference Result 440 states and 1145 transitions. [2021-08-21 12:01:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:01:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:26,322 INFO L225 Difference]: With dead ends: 440 [2021-08-21 12:01:26,322 INFO L226 Difference]: Without dead ends: 439 [2021-08-21 12:01:26,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-21 12:01:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 330. [2021-08-21 12:01:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0030395136778116) internal successors, (988), 329 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 988 transitions. [2021-08-21 12:01:26,327 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 988 transitions. Word has length 17 [2021-08-21 12:01:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:26,327 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 988 transitions. [2021-08-21 12:01:26,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 988 transitions. [2021-08-21 12:01:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:26,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:26,327 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:26,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:26,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:26,545 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:26,545 INFO L82 PathProgramCache]: Analyzing trace with hash 998556393, now seen corresponding path program 55 times [2021-08-21 12:01:26,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:26,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193650396] [2021-08-21 12:01:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:26,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:26,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:26,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193650396] [2021-08-21 12:01:26,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193650396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:26,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735068504] [2021-08-21 12:01:26,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:26,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:26,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:26,604 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:26,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:01:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:26,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:26,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735068504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:26,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:26,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-21 12:01:26,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636474736] [2021-08-21 12:01:26,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:26,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:26,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:26,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:26,970 INFO L87 Difference]: Start difference. First operand 330 states and 988 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:27,090 INFO L93 Difference]: Finished difference Result 442 states and 1145 transitions. [2021-08-21 12:01:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:01:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 17 [2021-08-21 12:01:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:27,092 INFO L225 Difference]: With dead ends: 442 [2021-08-21 12:01:27,092 INFO L226 Difference]: Without dead ends: 440 [2021-08-21 12:01:27,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-21 12:01:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 330. [2021-08-21 12:01:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9969604863221884) internal successors, (986), 329 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 986 transitions. [2021-08-21 12:01:27,097 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 986 transitions. Word has length 17 [2021-08-21 12:01:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:27,097 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 986 transitions. [2021-08-21 12:01:27,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 986 transitions. [2021-08-21 12:01:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:27,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:27,098 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:27,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:27,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:27,315 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:27,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1743258891, now seen corresponding path program 56 times [2021-08-21 12:01:27,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:27,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816466726] [2021-08-21 12:01:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:27,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:27,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:27,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816466726] [2021-08-21 12:01:27,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816466726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:27,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049564324] [2021-08-21 12:01:27,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:27,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:27,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:27,371 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:27,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:01:27,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:27,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:27,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:27,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049564324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:27,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:27,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:01:27,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480141768] [2021-08-21 12:01:27,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:27,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:27,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:27,750 INFO L87 Difference]: Start difference. First operand 330 states and 986 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:27,858 INFO L93 Difference]: Finished difference Result 446 states and 1149 transitions. [2021-08-21 12:01:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:01:27,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 17 [2021-08-21 12:01:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:27,860 INFO L225 Difference]: With dead ends: 446 [2021-08-21 12:01:27,860 INFO L226 Difference]: Without dead ends: 443 [2021-08-21 12:01:27,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:01:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-21 12:01:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-08-21 12:01:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9939209726443767) internal successors, (985), 329 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 985 transitions. [2021-08-21 12:01:27,865 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 985 transitions. Word has length 17 [2021-08-21 12:01:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:27,865 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 985 transitions. [2021-08-21 12:01:27,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 985 transitions. [2021-08-21 12:01:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:27,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:27,866 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:27,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:28,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:01:28,067 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash -940767447, now seen corresponding path program 57 times [2021-08-21 12:01:28,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:28,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108340969] [2021-08-21 12:01:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:28,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:28,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:28,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108340969] [2021-08-21 12:01:28,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108340969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:28,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995385871] [2021-08-21 12:01:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:28,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:28,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:28,137 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:28,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:01:28,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:28,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:28,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:28,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995385871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:28,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:28,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:28,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284113478] [2021-08-21 12:01:28,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:28,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:28,538 INFO L87 Difference]: Start difference. First operand 330 states and 985 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:28,619 INFO L93 Difference]: Finished difference Result 387 states and 1091 transitions. [2021-08-21 12:01:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17 [2021-08-21 12:01:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:28,621 INFO L225 Difference]: With dead ends: 387 [2021-08-21 12:01:28,621 INFO L226 Difference]: Without dead ends: 384 [2021-08-21 12:01:28,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-08-21 12:01:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 330. [2021-08-21 12:01:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2021-08-21 12:01:28,625 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 17 [2021-08-21 12:01:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:28,625 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2021-08-21 12:01:28,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2021-08-21 12:01:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:28,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:28,626 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:28,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:28,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 12:01:28,837 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:28,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1753761995, now seen corresponding path program 58 times [2021-08-21 12:01:28,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:28,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188510598] [2021-08-21 12:01:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:28,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:28,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:28,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188510598] [2021-08-21 12:01:28,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188510598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:28,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644026935] [2021-08-21 12:01:28,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:28,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:28,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:28,896 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:28,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:01:29,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:29,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:29,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:29,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644026935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:29,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:29,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:01:29,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212446441] [2021-08-21 12:01:29,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:29,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:29,286 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:29,368 INFO L93 Difference]: Finished difference Result 386 states and 1088 transitions. [2021-08-21 12:01:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 17 [2021-08-21 12:01:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:29,369 INFO L225 Difference]: With dead ends: 386 [2021-08-21 12:01:29,369 INFO L226 Difference]: Without dead ends: 382 [2021-08-21 12:01:29,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-08-21 12:01:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 330. [2021-08-21 12:01:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.987841945288754) internal successors, (983), 329 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 983 transitions. [2021-08-21 12:01:29,374 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 983 transitions. Word has length 17 [2021-08-21 12:01:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:29,374 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 983 transitions. [2021-08-21 12:01:29,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 983 transitions. [2021-08-21 12:01:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:29,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:29,375 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:29,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:29,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 12:01:29,587 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash -615171223, now seen corresponding path program 59 times [2021-08-21 12:01:29,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:29,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481911663] [2021-08-21 12:01:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:29,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:29,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:29,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481911663] [2021-08-21 12:01:29,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481911663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:29,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742046392] [2021-08-21 12:01:29,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:29,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:29,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:29,651 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:29,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:01:29,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:01:29,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:30,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742046392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:30,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:30,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:30,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563411297] [2021-08-21 12:01:30,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:30,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:30,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:30,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:30,025 INFO L87 Difference]: Start difference. First operand 330 states and 983 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:30,102 INFO L93 Difference]: Finished difference Result 373 states and 1073 transitions. [2021-08-21 12:01:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:30,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17 [2021-08-21 12:01:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:30,104 INFO L225 Difference]: With dead ends: 373 [2021-08-21 12:01:30,104 INFO L226 Difference]: Without dead ends: 368 [2021-08-21 12:01:30,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:01:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-21 12:01:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 330. [2021-08-21 12:01:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9848024316109423) internal successors, (982), 329 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 982 transitions. [2021-08-21 12:01:30,108 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 982 transitions. Word has length 17 [2021-08-21 12:01:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:30,108 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 982 transitions. [2021-08-21 12:01:30,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 982 transitions. [2021-08-21 12:01:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:30,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:30,109 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:30,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:30,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:30,326 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1189984907, now seen corresponding path program 60 times [2021-08-21 12:01:30,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:30,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923498575] [2021-08-21 12:01:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:30,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:30,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:30,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923498575] [2021-08-21 12:01:30,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923498575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:30,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856593446] [2021-08-21 12:01:30,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:30,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:30,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:30,382 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:30,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:01:30,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:01:30,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:30,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:30,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:30,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856593446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:30,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:30,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:30,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939251522] [2021-08-21 12:01:30,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:30,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:30,790 INFO L87 Difference]: Start difference. First operand 330 states and 982 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:01:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:30,852 INFO L93 Difference]: Finished difference Result 521 states and 1403 transitions. [2021-08-21 12:01:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:30,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-08-21 12:01:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:30,854 INFO L225 Difference]: With dead ends: 521 [2021-08-21 12:01:30,854 INFO L226 Difference]: Without dead ends: 521 [2021-08-21 12:01:30,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-21 12:01:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 386. [2021-08-21 12:01:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.1142857142857143) internal successors, (1199), 385 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1199 transitions. [2021-08-21 12:01:30,860 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1199 transitions. Word has length 17 [2021-08-21 12:01:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:30,860 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1199 transitions. [2021-08-21 12:01:30,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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) [2021-08-21 12:01:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1199 transitions. [2021-08-21 12:01:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:30,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:30,861 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:30,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:31,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:31,079 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash -281061497, now seen corresponding path program 61 times [2021-08-21 12:01:31,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:31,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797515623] [2021-08-21 12:01:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:31,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:31,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:31,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797515623] [2021-08-21 12:01:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797515623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:31,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144329664] [2021-08-21 12:01:31,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:31,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:31,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:31,139 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:31,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:01:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:31,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:31,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:31,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144329664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:31,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:31,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2021-08-21 12:01:31,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776316291] [2021-08-21 12:01:31,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:31,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:31,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:31,549 INFO L87 Difference]: Start difference. First operand 386 states and 1199 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:31,591 INFO L93 Difference]: Finished difference Result 507 states and 1373 transitions. [2021-08-21 12:01:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 12:01:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:31,605 INFO L225 Difference]: With dead ends: 507 [2021-08-21 12:01:31,605 INFO L226 Difference]: Without dead ends: 507 [2021-08-21 12:01:31,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-08-21 12:01:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 384. [2021-08-21 12:01:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.10443864229765) internal successors, (1189), 383 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1189 transitions. [2021-08-21 12:01:31,631 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1189 transitions. Word has length 17 [2021-08-21 12:01:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:31,631 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1189 transitions. [2021-08-21 12:01:31,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1189 transitions. [2021-08-21 12:01:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:31,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:31,632 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:31,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:31,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 12:01:31,845 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash 574245157, now seen corresponding path program 62 times [2021-08-21 12:01:31,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:31,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134189059] [2021-08-21 12:01:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:31,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:31,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:31,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134189059] [2021-08-21 12:01:31,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134189059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:31,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538102930] [2021-08-21 12:01:31,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:31,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:31,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:31,899 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:31,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:01:32,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:32,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:32,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:32,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:01:32,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538102930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:32,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:32,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-21 12:01:32,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983209256] [2021-08-21 12:01:32,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:32,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:32,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:32,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:32,323 INFO L87 Difference]: Start difference. First operand 384 states and 1189 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:32,406 INFO L93 Difference]: Finished difference Result 498 states and 1363 transitions. [2021-08-21 12:01:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:32,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 17 [2021-08-21 12:01:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:32,408 INFO L225 Difference]: With dead ends: 498 [2021-08-21 12:01:32,408 INFO L226 Difference]: Without dead ends: 496 [2021-08-21 12:01:32,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-21 12:01:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 384. [2021-08-21 12:01:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-08-21 12:01:32,414 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-08-21 12:01:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:32,414 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-08-21 12:01:32,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-08-21 12:01:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:32,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:32,415 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:32,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:32,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 12:01:32,632 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:32,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1318947655, now seen corresponding path program 63 times [2021-08-21 12:01:32,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:32,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293427792] [2021-08-21 12:01:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:32,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:32,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:32,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293427792] [2021-08-21 12:01:32,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293427792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:32,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158563641] [2021-08-21 12:01:32,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:32,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:32,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:32,679 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:32,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:01:33,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:01:33,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:33,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:33,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158563641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:33,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:33,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:33,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772640314] [2021-08-21 12:01:33,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:33,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:33,128 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:33,242 INFO L93 Difference]: Finished difference Result 503 states and 1368 transitions. [2021-08-21 12:01:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:01:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17 [2021-08-21 12:01:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:33,243 INFO L225 Difference]: With dead ends: 503 [2021-08-21 12:01:33,243 INFO L226 Difference]: Without dead ends: 500 [2021-08-21 12:01:33,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-08-21 12:01:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 390. [2021-08-21 12:01:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.107969151670951) internal successors, (1209), 389 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1209 transitions. [2021-08-21 12:01:33,249 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1209 transitions. Word has length 17 [2021-08-21 12:01:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:33,249 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1209 transitions. [2021-08-21 12:01:33,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1209 transitions. [2021-08-21 12:01:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:33,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:33,250 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:33,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:33,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:33,465 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1365078683, now seen corresponding path program 64 times [2021-08-21 12:01:33,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:33,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827114088] [2021-08-21 12:01:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:33,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:33,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:33,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827114088] [2021-08-21 12:01:33,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827114088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:33,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940648633] [2021-08-21 12:01:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:33,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:33,511 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:33,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:01:33,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:33,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:33,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940648633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:33,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:33,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:01:33,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682957788] [2021-08-21 12:01:33,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:33,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:33,946 INFO L87 Difference]: Start difference. First operand 390 states and 1209 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:34,036 INFO L93 Difference]: Finished difference Result 453 states and 1325 transitions. [2021-08-21 12:01:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:34,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 17 [2021-08-21 12:01:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:34,037 INFO L225 Difference]: With dead ends: 453 [2021-08-21 12:01:34,037 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 12:01:34,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 12:01:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-08-21 12:01:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1053984575835476) internal successors, (1208), 389 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1208 transitions. [2021-08-21 12:01:34,043 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1208 transitions. Word has length 17 [2021-08-21 12:01:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:34,043 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1208 transitions. [2021-08-21 12:01:34,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1208 transitions. [2021-08-21 12:01:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:34,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:34,043 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:34,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:34,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 12:01:34,260 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1329450759, now seen corresponding path program 65 times [2021-08-21 12:01:34,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:34,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014711044] [2021-08-21 12:01:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:34,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:34,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:34,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014711044] [2021-08-21 12:01:34,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014711044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:34,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836147584] [2021-08-21 12:01:34,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:34,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:34,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:34,314 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:34,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:01:34,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:01:34,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:34,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:34,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836147584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:34,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:34,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:34,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068360758] [2021-08-21 12:01:34,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:34,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:34,770 INFO L87 Difference]: Start difference. First operand 390 states and 1208 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:34,860 INFO L93 Difference]: Finished difference Result 450 states and 1319 transitions. [2021-08-21 12:01:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:01:34,860 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17 [2021-08-21 12:01:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:34,861 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:01:34,861 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 12:01:34,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 12:01:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-08-21 12:01:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-08-21 12:01:34,866 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-08-21 12:01:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:34,866 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-08-21 12:01:34,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-08-21 12:01:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:34,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:34,867 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:34,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:35,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 12:01:35,081 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1039482459, now seen corresponding path program 66 times [2021-08-21 12:01:35,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:35,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807780159] [2021-08-21 12:01:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:35,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:35,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:35,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807780159] [2021-08-21 12:01:35,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807780159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:35,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207199596] [2021-08-21 12:01:35,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:35,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:35,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:35,132 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:35,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:01:35,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:01:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:01:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:35,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207199596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:35,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:35,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:01:35,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137522203] [2021-08-21 12:01:35,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:35,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:35,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:35,570 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:35,654 INFO L93 Difference]: Finished difference Result 444 states and 1312 transitions. [2021-08-21 12:01:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 17 [2021-08-21 12:01:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:35,655 INFO L225 Difference]: With dead ends: 444 [2021-08-21 12:01:35,655 INFO L226 Difference]: Without dead ends: 439 [2021-08-21 12:01:35,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-21 12:01:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-08-21 12:01:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-08-21 12:01:35,661 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-08-21 12:01:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:35,661 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-08-21 12:01:35,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-08-21 12:01:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-08-21 12:01:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 12:01:35,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:35,662 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:35,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:35,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 12:01:35,879 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1461968185, now seen corresponding path program 67 times [2021-08-21 12:01:35,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:35,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397197511] [2021-08-21 12:01:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:35,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:35,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:35,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397197511] [2021-08-21 12:01:35,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397197511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:35,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866320764] [2021-08-21 12:01:35,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:35,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:35,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:35,935 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:35,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:01:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:36,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 12:01:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:36,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866320764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:36,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:36,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-21 12:01:36,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002556395] [2021-08-21 12:01:36,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:01:36,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:01:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:36,398 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:36,494 INFO L93 Difference]: Finished difference Result 435 states and 1300 transitions. [2021-08-21 12:01:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 17 [2021-08-21 12:01:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:36,495 INFO L225 Difference]: With dead ends: 435 [2021-08-21 12:01:36,495 INFO L226 Difference]: Without dead ends: 429 [2021-08-21 12:01:36,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-21 12:01:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-08-21 12:01:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-08-21 12:01:36,501 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-08-21 12:01:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:36,501 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-08-21 12:01:36,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-08-21 12:01:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:01:36,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:36,501 INFO L512 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:36,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:36,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 12:01:36,719 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -330098126, now seen corresponding path program 68 times [2021-08-21 12:01:36,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:36,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906474375] [2021-08-21 12:01:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:36,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:36,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:36,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906474375] [2021-08-21 12:01:36,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906474375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:36,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916771592] [2021-08-21 12:01:36,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:36,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:36,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:36,910 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:36,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:01:37,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:37,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:01:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:37,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916771592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:37,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 12:01:37,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670530956] [2021-08-21 12:01:37,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:01:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:01:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:01:37,423 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:37,518 INFO L93 Difference]: Finished difference Result 721 states and 2127 transitions. [2021-08-21 12:01:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:01:37,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:01:37,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:37,520 INFO L225 Difference]: With dead ends: 721 [2021-08-21 12:01:37,520 INFO L226 Difference]: Without dead ends: 721 [2021-08-21 12:01:37,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-08-21 12:01:37,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-08-21 12:01:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.046770601336303) internal successors, (1368), 449 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1368 transitions. [2021-08-21 12:01:37,527 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1368 transitions. Word has length 18 [2021-08-21 12:01:37,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:37,527 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1368 transitions. [2021-08-21 12:01:37,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1368 transitions. [2021-08-21 12:01:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:01:37,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:37,528 INFO L512 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:37,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:37,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:37,746 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash -69898281, now seen corresponding path program 69 times [2021-08-21 12:01:37,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:37,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413165708] [2021-08-21 12:01:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:37,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:37,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:37,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413165708] [2021-08-21 12:01:37,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413165708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:37,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930133479] [2021-08-21 12:01:37,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:37,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:37,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:37,911 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:37,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:01:38,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:01:38,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:38,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:01:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:38,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930133479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:38,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:38,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 12:01:38,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111044986] [2021-08-21 12:01:38,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:01:38,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:38,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:01:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:01:38,413 INFO L87 Difference]: Start difference. First operand 450 states and 1368 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:38,569 INFO L93 Difference]: Finished difference Result 819 states and 2403 transitions. [2021-08-21 12:01:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:38,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:01:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:38,572 INFO L225 Difference]: With dead ends: 819 [2021-08-21 12:01:38,572 INFO L226 Difference]: Without dead ends: 819 [2021-08-21 12:01:38,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:01:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-21 12:01:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-08-21 12:01:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0056603773584905) internal successors, (1593), 530 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1593 transitions. [2021-08-21 12:01:38,582 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1593 transitions. Word has length 19 [2021-08-21 12:01:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:38,582 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1593 transitions. [2021-08-21 12:01:38,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1593 transitions. [2021-08-21 12:01:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:01:38,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:38,583 INFO L512 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:38,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:38,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:38,801 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash -593637678, now seen corresponding path program 70 times [2021-08-21 12:01:38,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:38,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909319286] [2021-08-21 12:01:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:38,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:38,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:38,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909319286] [2021-08-21 12:01:38,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909319286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:38,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952863234] [2021-08-21 12:01:38,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:38,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:38,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:38,962 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:38,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:01:39,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:39,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:39,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952863234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:39,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:39,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 12:01:39,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969034223] [2021-08-21 12:01:39,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:01:39,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:39,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:01:39,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:01:39,546 INFO L87 Difference]: Start difference. First operand 531 states and 1593 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:39,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:39,729 INFO L93 Difference]: Finished difference Result 928 states and 2708 transitions. [2021-08-21 12:01:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:39,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:01:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:39,731 INFO L225 Difference]: With dead ends: 928 [2021-08-21 12:01:39,731 INFO L226 Difference]: Without dead ends: 927 [2021-08-21 12:01:39,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:01:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-08-21 12:01:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-08-21 12:01:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9823717948717947) internal successors, (1861), 624 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1861 transitions. [2021-08-21 12:01:39,740 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1861 transitions. Word has length 20 [2021-08-21 12:01:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:39,740 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1861 transitions. [2021-08-21 12:01:39,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1861 transitions. [2021-08-21 12:01:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:01:39,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:39,741 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:39,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:39,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:39,946 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:39,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:39,946 INFO L82 PathProgramCache]: Analyzing trace with hash 350310199, now seen corresponding path program 71 times [2021-08-21 12:01:39,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:39,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928178728] [2021-08-21 12:01:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:39,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:40,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:40,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928178728] [2021-08-21 12:01:40,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928178728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:40,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814893846] [2021-08-21 12:01:40,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:40,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:40,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:40,064 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:40,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:01:40,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:01:40,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:01:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:40,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:01:40,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:01:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:49,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814893846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:49,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:49,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:01:49,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103249441] [2021-08-21 12:01:49,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:01:49,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:49,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:01:49,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:01:49,683 INFO L87 Difference]: Start difference. First operand 625 states and 1861 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:49,965 INFO L93 Difference]: Finished difference Result 848 states and 2362 transitions. [2021-08-21 12:01:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:01:49,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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 21 [2021-08-21 12:01:49,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:49,967 INFO L225 Difference]: With dead ends: 848 [2021-08-21 12:01:49,967 INFO L226 Difference]: Without dead ends: 845 [2021-08-21 12:01:49,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:01:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-08-21 12:01:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-08-21 12:01:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0347222222222223) internal successors, (2185), 720 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2185 transitions. [2021-08-21 12:01:49,977 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2185 transitions. Word has length 21 [2021-08-21 12:01:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:49,977 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2185 transitions. [2021-08-21 12:01:49,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2185 transitions. [2021-08-21 12:01:49,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:01:49,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:49,978 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:49,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:50,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 12:01:50,193 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:50,193 INFO L82 PathProgramCache]: Analyzing trace with hash -34996041, now seen corresponding path program 72 times [2021-08-21 12:01:50,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:50,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795430227] [2021-08-21 12:01:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:50,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:50,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:50,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795430227] [2021-08-21 12:01:50,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795430227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:50,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232936939] [2021-08-21 12:01:50,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:50,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:50,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:50,304 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:01:50,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:01:50,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:01:50,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:50,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:01:50,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:51,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:01:51,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:02:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:02,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232936939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:02,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:02,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:02:02,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085079804] [2021-08-21 12:02:02,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:02:02,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:02:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:02,406 INFO L87 Difference]: Start difference. First operand 721 states and 2185 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:02,648 INFO L93 Difference]: Finished difference Result 961 states and 2738 transitions. [2021-08-21 12:02:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:02:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:02:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:02,653 INFO L225 Difference]: With dead ends: 961 [2021-08-21 12:02:02,653 INFO L226 Difference]: Without dead ends: 958 [2021-08-21 12:02:02,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-08-21 12:02:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-08-21 12:02:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.103960396039604) internal successors, (2508), 808 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2508 transitions. [2021-08-21 12:02:02,665 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2508 transitions. Word has length 21 [2021-08-21 12:02:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:02,665 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 2508 transitions. [2021-08-21 12:02:02,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2508 transitions. [2021-08-21 12:02:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:02,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:02,667 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:02,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:02,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:02,885 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:02,885 INFO L82 PathProgramCache]: Analyzing trace with hash 381323575, now seen corresponding path program 73 times [2021-08-21 12:02:02,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:02,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848224109] [2021-08-21 12:02:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:02,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:02,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:02,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848224109] [2021-08-21 12:02:02,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848224109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:02,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846297096] [2021-08-21 12:02:02,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:02,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:02,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:02,998 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:03,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:02:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:02:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:03,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:02:03,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:02:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:16,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846297096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:16,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:16,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:02:16,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064899860] [2021-08-21 12:02:16,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:02:16,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:16,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:02:16,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:16,397 INFO L87 Difference]: Start difference. First operand 809 states and 2508 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:16,657 INFO L93 Difference]: Finished difference Result 1077 states and 3154 transitions. [2021-08-21 12:02:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:02:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:02:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:16,660 INFO L225 Difference]: With dead ends: 1077 [2021-08-21 12:02:16,660 INFO L226 Difference]: Without dead ends: 1074 [2021-08-21 12:02:16,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-08-21 12:02:16,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-08-21 12:02:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1805251641137855) internal successors, (2907), 914 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2907 transitions. [2021-08-21 12:02:16,674 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2907 transitions. Word has length 21 [2021-08-21 12:02:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:16,674 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2907 transitions. [2021-08-21 12:02:16,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2907 transitions. [2021-08-21 12:02:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:16,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:16,675 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:16,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:16,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:16,889 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:16,889 INFO L82 PathProgramCache]: Analyzing trace with hash 402329783, now seen corresponding path program 74 times [2021-08-21 12:02:16,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:16,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924042466] [2021-08-21 12:02:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:16,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:16,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:16,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924042466] [2021-08-21 12:02:16,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924042466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:16,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698928400] [2021-08-21 12:02:16,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:16,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:16,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:16,977 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:16,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:02:17,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:17,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:02:17,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:17,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:02:17,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:02:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:26,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698928400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:26,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:26,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:02:26,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427393579] [2021-08-21 12:02:26,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:02:26,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:02:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:26,181 INFO L87 Difference]: Start difference. First operand 915 states and 2907 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:26,467 INFO L93 Difference]: Finished difference Result 1210 states and 3651 transitions. [2021-08-21 12:02:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:02:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:02:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:26,470 INFO L225 Difference]: With dead ends: 1210 [2021-08-21 12:02:26,470 INFO L226 Difference]: Without dead ends: 1207 [2021-08-21 12:02:26,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-08-21 12:02:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1042. [2021-08-21 12:02:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2593659942363113) internal successors, (3393), 1041 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3393 transitions. [2021-08-21 12:02:26,487 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3393 transitions. Word has length 21 [2021-08-21 12:02:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:26,487 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 3393 transitions. [2021-08-21 12:02:26,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3393 transitions. [2021-08-21 12:02:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:26,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:26,489 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:26,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 12:02:26,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 12:02:26,705 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1053522231, now seen corresponding path program 75 times [2021-08-21 12:02:26,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:26,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705794642] [2021-08-21 12:02:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:26,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:26,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:26,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705794642] [2021-08-21 12:02:26,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705794642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:26,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378803075] [2021-08-21 12:02:26,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:26,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:26,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:26,786 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:26,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:02:27,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:02:27,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:02:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:27,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:02:27,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:02:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:38,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378803075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:38,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:38,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:02:38,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138655970] [2021-08-21 12:02:38,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:02:38,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:02:38,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:38,588 INFO L87 Difference]: Start difference. First operand 1042 states and 3393 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:38,935 INFO L93 Difference]: Finished difference Result 1356 states and 4205 transitions. [2021-08-21 12:02:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:02:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:02:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:38,938 INFO L225 Difference]: With dead ends: 1356 [2021-08-21 12:02:38,938 INFO L226 Difference]: Without dead ends: 1353 [2021-08-21 12:02:38,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-08-21 12:02:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-08-21 12:02:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3246425567703954) internal successors, (3953), 1189 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3953 transitions. [2021-08-21 12:02:38,955 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3953 transitions. Word has length 21 [2021-08-21 12:02:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:38,956 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 3953 transitions. [2021-08-21 12:02:38,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:38,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3953 transitions. [2021-08-21 12:02:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:38,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:38,957 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:38,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:39,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 12:02:39,173 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash -234348361, now seen corresponding path program 76 times [2021-08-21 12:02:39,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:39,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141202263] [2021-08-21 12:02:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:39,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:39,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:39,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141202263] [2021-08-21 12:02:39,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141202263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:39,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799696078] [2021-08-21 12:02:39,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:39,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:39,259 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:39,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:02:39,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:39,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:39,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:02:39,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:40,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:02:40,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:02:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:47,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799696078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:47,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:47,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:02:47,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083419307] [2021-08-21 12:02:47,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:02:47,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:02:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:47,069 INFO L87 Difference]: Start difference. First operand 1190 states and 3953 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:47,432 INFO L93 Difference]: Finished difference Result 1521 states and 4821 transitions. [2021-08-21 12:02:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:02:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:02:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:47,437 INFO L225 Difference]: With dead ends: 1521 [2021-08-21 12:02:47,437 INFO L226 Difference]: Without dead ends: 1518 [2021-08-21 12:02:47,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:02:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-08-21 12:02:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-08-21 12:02:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.378978534418949) internal successors, (4565), 1351 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4565 transitions. [2021-08-21 12:02:47,462 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4565 transitions. Word has length 21 [2021-08-21 12:02:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:47,462 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 4565 transitions. [2021-08-21 12:02:47,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4565 transitions. [2021-08-21 12:02:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:02:47,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:47,464 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:47,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:47,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:47,680 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:47,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1503631049, now seen corresponding path program 77 times [2021-08-21 12:02:47,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:47,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142314669] [2021-08-21 12:02:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:47,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:47,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:47,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142314669] [2021-08-21 12:02:47,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142314669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:47,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646520418] [2021-08-21 12:02:47,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:47,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:47,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:47,755 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:02:47,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:02:48,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:02:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:02:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:48,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:02:48,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:03:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:03,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646520418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:03,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:03,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:03:03,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955773508] [2021-08-21 12:03:03,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:03:03,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:03,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:03:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:03,006 INFO L87 Difference]: Start difference. First operand 1352 states and 4565 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:03,340 INFO L93 Difference]: Finished difference Result 1650 states and 5282 transitions. [2021-08-21 12:03:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:03:03,340 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:03:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:03,344 INFO L225 Difference]: With dead ends: 1650 [2021-08-21 12:03:03,344 INFO L226 Difference]: Without dead ends: 1647 [2021-08-21 12:03:03,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-08-21 12:03:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-08-21 12:03:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.3962264150943398) internal successors, (5040), 1484 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5040 transitions. [2021-08-21 12:03:03,369 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5040 transitions. Word has length 21 [2021-08-21 12:03:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:03,369 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 5040 transitions. [2021-08-21 12:03:03,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5040 transitions. [2021-08-21 12:03:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:03,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:03,371 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:03,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:03,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:03,585 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:03,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2098278583, now seen corresponding path program 78 times [2021-08-21 12:03:03,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:03,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530268391] [2021-08-21 12:03:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:03,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:03,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:03,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530268391] [2021-08-21 12:03:03,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530268391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:03,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163178838] [2021-08-21 12:03:03,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:03,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:03,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:03,682 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:03,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:03:04,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:03:04,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:04,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:04,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:03:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:18,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163178838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:18,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:18,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:03:18,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193055338] [2021-08-21 12:03:18,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:03:18,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:18,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:03:18,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:18,022 INFO L87 Difference]: Start difference. First operand 1485 states and 5040 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:18,400 INFO L93 Difference]: Finished difference Result 1787 states and 5764 transitions. [2021-08-21 12:03:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:03:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:03:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:18,403 INFO L225 Difference]: With dead ends: 1787 [2021-08-21 12:03:18,403 INFO L226 Difference]: Without dead ends: 1784 [2021-08-21 12:03:18,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-08-21 12:03:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-08-21 12:03:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.4092592592592594) internal successors, (5523), 1620 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5523 transitions. [2021-08-21 12:03:18,430 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5523 transitions. Word has length 21 [2021-08-21 12:03:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:18,431 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 5523 transitions. [2021-08-21 12:03:18,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5523 transitions. [2021-08-21 12:03:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:18,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:18,433 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:18,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 12:03:18,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 12:03:18,649 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:18,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2088327479, now seen corresponding path program 79 times [2021-08-21 12:03:18,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:18,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20578279] [2021-08-21 12:03:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:18,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:18,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:18,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20578279] [2021-08-21 12:03:18,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20578279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:18,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317658470] [2021-08-21 12:03:18,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:18,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:18,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:18,742 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:18,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:03:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:19,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:19,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:03:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:30,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317658470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:30,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:30,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:03:30,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905388312] [2021-08-21 12:03:30,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:03:30,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:03:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:30,704 INFO L87 Difference]: Start difference. First operand 1621 states and 5523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:31,059 INFO L93 Difference]: Finished difference Result 1931 states and 6250 transitions. [2021-08-21 12:03:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:03:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:03:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:31,062 INFO L225 Difference]: With dead ends: 1931 [2021-08-21 12:03:31,062 INFO L226 Difference]: Without dead ends: 1928 [2021-08-21 12:03:31,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-21 12:03:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-08-21 12:03:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4116978989210676) internal successors, (6008), 1761 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6008 transitions. [2021-08-21 12:03:31,089 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6008 transitions. Word has length 21 [2021-08-21 12:03:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:31,090 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 6008 transitions. [2021-08-21 12:03:31,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6008 transitions. [2021-08-21 12:03:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:31,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:31,092 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:31,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:31,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:31,313 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1779843255, now seen corresponding path program 80 times [2021-08-21 12:03:31,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:31,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569751138] [2021-08-21 12:03:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:31,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:31,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:31,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569751138] [2021-08-21 12:03:31,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569751138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:31,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817215923] [2021-08-21 12:03:31,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:31,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:31,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:31,417 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:31,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:03:32,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:32,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:32,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:32,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:32,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:03:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:40,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817215923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:40,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:40,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:03:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937066797] [2021-08-21 12:03:40,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:03:40,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:03:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:40,997 INFO L87 Difference]: Start difference. First operand 1762 states and 6008 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:41,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:41,381 INFO L93 Difference]: Finished difference Result 2066 states and 6690 transitions. [2021-08-21 12:03:41,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:03:41,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:03:41,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:41,385 INFO L225 Difference]: With dead ends: 2066 [2021-08-21 12:03:41,385 INFO L226 Difference]: Without dead ends: 2063 [2021-08-21 12:03:41,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-08-21 12:03:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-08-21 12:03:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4082496033844527) internal successors, (6445), 1891 states have internal predecessors, (6445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6445 transitions. [2021-08-21 12:03:41,414 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6445 transitions. Word has length 21 [2021-08-21 12:03:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:41,414 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 6445 transitions. [2021-08-21 12:03:41,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6445 transitions. [2021-08-21 12:03:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:03:41,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:41,417 INFO L512 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:41,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:41,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:41,635 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash 806766903, now seen corresponding path program 81 times [2021-08-21 12:03:41,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:41,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556918313] [2021-08-21 12:03:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:41,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:41,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:41,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556918313] [2021-08-21 12:03:41,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556918313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:41,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101559681] [2021-08-21 12:03:41,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:41,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:41,733 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:03:41,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:03:42,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:03:42,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:42,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 12:03:42,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:42,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:03:42,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-08-21 12:03:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:59,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101559681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:59,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:59,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-21 12:03:59,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865976881] [2021-08-21 12:03:59,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 12:03:59,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 12:03:59,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:03:59,826 INFO L87 Difference]: Start difference. First operand 1892 states and 6445 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:00,220 INFO L93 Difference]: Finished difference Result 2152 states and 7012 transitions. [2021-08-21 12:04:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:04:00,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-08-21 12:04:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:00,225 INFO L225 Difference]: With dead ends: 2152 [2021-08-21 12:04:00,225 INFO L226 Difference]: Without dead ends: 2149 [2021-08-21 12:04:00,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:04:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-08-21 12:04:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-08-21 12:04:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.4074074074074074) internal successors, (6808), 1998 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6808 transitions. [2021-08-21 12:04:00,260 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6808 transitions. Word has length 21 [2021-08-21 12:04:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:00,260 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 6808 transitions. [2021-08-21 12:04:00,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6808 transitions. [2021-08-21 12:04:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:00,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:00,265 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:00,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:00,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 12:04:00,483 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2024559836, now seen corresponding path program 82 times [2021-08-21 12:04:00,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:00,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782748127] [2021-08-21 12:04:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:00,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:00,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:00,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782748127] [2021-08-21 12:04:00,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782748127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:00,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082177397] [2021-08-21 12:04:00,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:00,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:00,614 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:00,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:04:01,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:01,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:01,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:01,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082177397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:01,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:01,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:04:01,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583735982] [2021-08-21 12:04:01,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:04:01,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:04:01,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:04:01,266 INFO L87 Difference]: Start difference. First operand 1999 states and 6808 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:01,582 INFO L93 Difference]: Finished difference Result 2328 states and 7345 transitions. [2021-08-21 12:04:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:04:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:01,586 INFO L225 Difference]: With dead ends: 2328 [2021-08-21 12:04:01,586 INFO L226 Difference]: Without dead ends: 2321 [2021-08-21 12:04:01,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 12:04:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-08-21 12:04:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 2029. [2021-08-21 12:04:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 3.4018737672583828) internal successors, (6899), 2028 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 6899 transitions. [2021-08-21 12:04:01,613 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 6899 transitions. Word has length 22 [2021-08-21 12:04:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:01,613 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 6899 transitions. [2021-08-21 12:04:01,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 6899 transitions. [2021-08-21 12:04:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:01,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:01,616 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:01,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:01,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:01,833 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash -452076686, now seen corresponding path program 83 times [2021-08-21 12:04:01,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:01,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211615025] [2021-08-21 12:04:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:01,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:01,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:01,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211615025] [2021-08-21 12:04:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211615025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:01,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359547162] [2021-08-21 12:04:01,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:01,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:01,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:01,951 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:01,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:04:02,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:04:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:02,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:02,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359547162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:02,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:02,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:04:02,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529689182] [2021-08-21 12:04:02,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:04:02,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:02,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:04:02,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:04:02,591 INFO L87 Difference]: Start difference. First operand 2029 states and 6899 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:02,783 INFO L93 Difference]: Finished difference Result 2213 states and 7105 transitions. [2021-08-21 12:04:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:02,786 INFO L225 Difference]: With dead ends: 2213 [2021-08-21 12:04:02,786 INFO L226 Difference]: Without dead ends: 2207 [2021-08-21 12:04:02,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:04:02,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-08-21 12:04:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1969. [2021-08-21 12:04:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3780487804878048) internal successors, (6648), 1968 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6648 transitions. [2021-08-21 12:04:02,811 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6648 transitions. Word has length 22 [2021-08-21 12:04:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:02,811 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 6648 transitions. [2021-08-21 12:04:02,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6648 transitions. [2021-08-21 12:04:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:02,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:02,814 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:02,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:03,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:03,027 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash 71540484, now seen corresponding path program 84 times [2021-08-21 12:04:03,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:03,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170442605] [2021-08-21 12:04:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:03,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:03,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:03,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170442605] [2021-08-21 12:04:03,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170442605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:03,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833697884] [2021-08-21 12:04:03,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:03,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:03,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:03,143 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:03,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:04:03,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833697884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:03,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:03,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:03,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122346223] [2021-08-21 12:04:03,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:03,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:03,782 INFO L87 Difference]: Start difference. First operand 1969 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:03,946 INFO L93 Difference]: Finished difference Result 2016 states and 6715 transitions. [2021-08-21 12:04:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:03,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:03,949 INFO L225 Difference]: With dead ends: 2016 [2021-08-21 12:04:03,949 INFO L226 Difference]: Without dead ends: 2015 [2021-08-21 12:04:03,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-08-21 12:04:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-08-21 12:04:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.375508130081301) internal successors, (6643), 1968 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6643 transitions. [2021-08-21 12:04:03,972 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6643 transitions. Word has length 22 [2021-08-21 12:04:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:03,972 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 6643 transitions. [2021-08-21 12:04:03,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6643 transitions. [2021-08-21 12:04:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:03,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:03,976 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:03,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:04,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 12:04:04,194 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash 937624436, now seen corresponding path program 85 times [2021-08-21 12:04:04,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:04,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273175670] [2021-08-21 12:04:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:04,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:04,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:04,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273175670] [2021-08-21 12:04:04,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273175670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:04,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879403226] [2021-08-21 12:04:04,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:04,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:04,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:04,317 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:04,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:04:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:04,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:04,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879403226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:04,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:04,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:04,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825020410] [2021-08-21 12:04:04,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:04,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:04,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:04,970 INFO L87 Difference]: Start difference. First operand 1969 states and 6643 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:05,042 INFO L93 Difference]: Finished difference Result 2320 states and 7232 transitions. [2021-08-21 12:04:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:05,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:05,048 INFO L225 Difference]: With dead ends: 2320 [2021-08-21 12:04:05,048 INFO L226 Difference]: Without dead ends: 2320 [2021-08-21 12:04:05,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:05,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-08-21 12:04:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-08-21 12:04:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.366527632950991) internal successors, (6457), 1918 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6457 transitions. [2021-08-21 12:04:05,098 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6457 transitions. Word has length 22 [2021-08-21 12:04:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:05,098 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 6457 transitions. [2021-08-21 12:04:05,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6457 transitions. [2021-08-21 12:04:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:05,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:05,101 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:05,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:05,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:05,318 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:05,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:05,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1084151388, now seen corresponding path program 86 times [2021-08-21 12:04:05,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:05,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016378136] [2021-08-21 12:04:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:05,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:05,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:05,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016378136] [2021-08-21 12:04:05,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016378136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:05,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726222377] [2021-08-21 12:04:05,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:05,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:05,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:05,418 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:05,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:04:06,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:06,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:06,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726222377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:06,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:06,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:06,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763963148] [2021-08-21 12:04:06,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:06,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:06,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:06,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:06,083 INFO L87 Difference]: Start difference. First operand 1919 states and 6457 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:06,284 INFO L93 Difference]: Finished difference Result 2212 states and 6901 transitions. [2021-08-21 12:04:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:06,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:06,288 INFO L225 Difference]: With dead ends: 2212 [2021-08-21 12:04:06,288 INFO L226 Difference]: Without dead ends: 2210 [2021-08-21 12:04:06,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-08-21 12:04:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1931. [2021-08-21 12:04:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.366321243523316) internal successors, (6497), 1930 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 6497 transitions. [2021-08-21 12:04:06,314 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 6497 transitions. Word has length 22 [2021-08-21 12:04:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:06,314 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 6497 transitions. [2021-08-21 12:04:06,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 6497 transitions. [2021-08-21 12:04:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:06,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:06,317 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:06,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:06,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:06,534 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:06,534 INFO L82 PathProgramCache]: Analyzing trace with hash -421063310, now seen corresponding path program 87 times [2021-08-21 12:04:06,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:06,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316358838] [2021-08-21 12:04:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:06,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:06,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:06,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316358838] [2021-08-21 12:04:06,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316358838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:06,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636188562] [2021-08-21 12:04:06,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:06,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:06,634 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:06,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:04:07,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:04:07,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:07,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:07,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636188562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:07,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:07,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:07,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875332944] [2021-08-21 12:04:07,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:07,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:07,334 INFO L87 Difference]: Start difference. First operand 1931 states and 6497 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:07,498 INFO L93 Difference]: Finished difference Result 2222 states and 6950 transitions. [2021-08-21 12:04:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:04:07,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:07,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:07,502 INFO L225 Difference]: With dead ends: 2222 [2021-08-21 12:04:07,502 INFO L226 Difference]: Without dead ends: 2222 [2021-08-21 12:04:07,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:04:07,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-08-21 12:04:07,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1928. [2021-08-21 12:04:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.342501297353399) internal successors, (6441), 1927 states have internal predecessors, (6441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6441 transitions. [2021-08-21 12:04:07,528 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6441 transitions. Word has length 22 [2021-08-21 12:04:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:07,528 INFO L470 AbstractCegarLoop]: Abstraction has 1928 states and 6441 transitions. [2021-08-21 12:04:07,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6441 transitions. [2021-08-21 12:04:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:07,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:07,532 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:07,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:07,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:07,745 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:07,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:07,745 INFO L82 PathProgramCache]: Analyzing trace with hash 487860100, now seen corresponding path program 88 times [2021-08-21 12:04:07,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:07,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196668908] [2021-08-21 12:04:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:07,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:07,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:07,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196668908] [2021-08-21 12:04:07,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196668908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:07,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749240734] [2021-08-21 12:04:07,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:07,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:07,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:07,851 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:07,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:04:08,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:08,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:08,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749240734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:08,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:08,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:08,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066526632] [2021-08-21 12:04:08,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:08,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:08,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:08,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:08,544 INFO L87 Difference]: Start difference. First operand 1928 states and 6441 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:08,724 INFO L93 Difference]: Finished difference Result 2091 states and 6664 transitions. [2021-08-21 12:04:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:08,728 INFO L225 Difference]: With dead ends: 2091 [2021-08-21 12:04:08,728 INFO L226 Difference]: Without dead ends: 2089 [2021-08-21 12:04:08,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-08-21 12:04:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-08-21 12:04:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3437334743521947) internal successors, (6323), 1891 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6323 transitions. [2021-08-21 12:04:08,753 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6323 transitions. Word has length 22 [2021-08-21 12:04:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:08,753 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 6323 transitions. [2021-08-21 12:04:08,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6323 transitions. [2021-08-21 12:04:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:08,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:08,756 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:08,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:08,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 12:04:08,970 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1353944052, now seen corresponding path program 89 times [2021-08-21 12:04:08,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:08,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818013125] [2021-08-21 12:04:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:08,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:09,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:09,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818013125] [2021-08-21 12:04:09,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818013125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:09,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480176226] [2021-08-21 12:04:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:09,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:09,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:09,065 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:09,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:04:09,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:04:09,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:09,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480176226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:09,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:09,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:09,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036702838] [2021-08-21 12:04:09,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:09,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:09,771 INFO L87 Difference]: Start difference. First operand 1892 states and 6323 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:09,839 INFO L93 Difference]: Finished difference Result 2273 states and 6967 transitions. [2021-08-21 12:04:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:09,843 INFO L225 Difference]: With dead ends: 2273 [2021-08-21 12:04:09,843 INFO L226 Difference]: Without dead ends: 2273 [2021-08-21 12:04:09,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-08-21 12:04:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-08-21 12:04:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3430079155672825) internal successors, (6335), 1895 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6335 transitions. [2021-08-21 12:04:09,868 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6335 transitions. Word has length 22 [2021-08-21 12:04:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:09,868 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 6335 transitions. [2021-08-21 12:04:09,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6335 transitions. [2021-08-21 12:04:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:09,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:09,870 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:09,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:10,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:10,091 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:10,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1343166754, now seen corresponding path program 90 times [2021-08-21 12:04:10,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:10,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182893587] [2021-08-21 12:04:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:10,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:10,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:10,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182893587] [2021-08-21 12:04:10,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182893587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:10,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379281625] [2021-08-21 12:04:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:10,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:10,194 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:10,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:04:10,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:10,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:10,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379281625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:10,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:10,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:10,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330902562] [2021-08-21 12:04:10,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:10,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:10,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:10,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:10,887 INFO L87 Difference]: Start difference. First operand 1896 states and 6335 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:11,084 INFO L93 Difference]: Finished difference Result 2019 states and 6514 transitions. [2021-08-21 12:04:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:04:11,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:11,088 INFO L225 Difference]: With dead ends: 2019 [2021-08-21 12:04:11,088 INFO L226 Difference]: Without dead ends: 2017 [2021-08-21 12:04:11,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-08-21 12:04:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-08-21 12:04:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3403693931398415) internal successors, (6330), 1895 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6330 transitions. [2021-08-21 12:04:11,111 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6330 transitions. Word has length 22 [2021-08-21 12:04:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:11,111 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 6330 transitions. [2021-08-21 12:04:11,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6330 transitions. [2021-08-21 12:04:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:11,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:11,114 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:11,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:11,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:11,331 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:11,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1230409936, now seen corresponding path program 91 times [2021-08-21 12:04:11,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:11,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752222656] [2021-08-21 12:04:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:11,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:11,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:11,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752222656] [2021-08-21 12:04:11,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752222656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:11,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332715801] [2021-08-21 12:04:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:11,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:11,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:11,433 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:11,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:04:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:12,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332715801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:12,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:12,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:12,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572932314] [2021-08-21 12:04:12,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:12,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:12,149 INFO L87 Difference]: Start difference. First operand 1896 states and 6330 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:12,248 INFO L93 Difference]: Finished difference Result 2414 states and 7318 transitions. [2021-08-21 12:04:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:12,251 INFO L225 Difference]: With dead ends: 2414 [2021-08-21 12:04:12,251 INFO L226 Difference]: Without dead ends: 2414 [2021-08-21 12:04:12,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-08-21 12:04:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-08-21 12:04:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3304395008138905) internal successors, (6138), 1843 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6138 transitions. [2021-08-21 12:04:12,275 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6138 transitions. Word has length 22 [2021-08-21 12:04:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:12,275 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 6138 transitions. [2021-08-21 12:04:12,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6138 transitions. [2021-08-21 12:04:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:12,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:12,278 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:12,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:12,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:12,493 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:12,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1063145180, now seen corresponding path program 92 times [2021-08-21 12:04:12,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:12,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470020181] [2021-08-21 12:04:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:12,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:12,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:12,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470020181] [2021-08-21 12:04:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470020181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:12,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346999543] [2021-08-21 12:04:12,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:12,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:12,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:12,589 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:12,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:04:13,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:13,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:13,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:13,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346999543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:13,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:13,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:13,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684933565] [2021-08-21 12:04:13,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:13,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:13,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:13,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:13,291 INFO L87 Difference]: Start difference. First operand 1844 states and 6138 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:13,479 INFO L93 Difference]: Finished difference Result 2136 states and 6581 transitions. [2021-08-21 12:04:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:13,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:13,483 INFO L225 Difference]: With dead ends: 2136 [2021-08-21 12:04:13,483 INFO L226 Difference]: Without dead ends: 2134 [2021-08-21 12:04:13,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-08-21 12:04:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1858. [2021-08-21 12:04:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.329025309639203) internal successors, (6182), 1857 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6182 transitions. [2021-08-21 12:04:13,508 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6182 transitions. Word has length 22 [2021-08-21 12:04:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:13,508 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6182 transitions. [2021-08-21 12:04:13,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6182 transitions. [2021-08-21 12:04:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:13,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:13,511 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:13,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:13,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:13,729 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash -400057102, now seen corresponding path program 93 times [2021-08-21 12:04:13,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:13,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116084534] [2021-08-21 12:04:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:13,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:13,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:13,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116084534] [2021-08-21 12:04:13,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116084534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:13,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701635216] [2021-08-21 12:04:13,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:13,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:13,820 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:13,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:04:14,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:04:14,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:14,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:14,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701635216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:14,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:14,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:14,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131788099] [2021-08-21 12:04:14,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:14,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:14,560 INFO L87 Difference]: Start difference. First operand 1858 states and 6182 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:14,701 INFO L93 Difference]: Finished difference Result 2136 states and 6601 transitions. [2021-08-21 12:04:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:14,705 INFO L225 Difference]: With dead ends: 2136 [2021-08-21 12:04:14,705 INFO L226 Difference]: Without dead ends: 2136 [2021-08-21 12:04:14,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:04:14,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-08-21 12:04:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1820. [2021-08-21 12:04:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.3062122045079714) internal successors, (6014), 1819 states have internal predecessors, (6014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6014 transitions. [2021-08-21 12:04:14,728 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6014 transitions. Word has length 22 [2021-08-21 12:04:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:14,728 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 6014 transitions. [2021-08-21 12:04:14,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6014 transitions. [2021-08-21 12:04:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:14,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:14,731 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:14,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:14,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 12:04:14,949 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash 508866308, now seen corresponding path program 94 times [2021-08-21 12:04:14,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:14,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074113963] [2021-08-21 12:04:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:14,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:15,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:15,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074113963] [2021-08-21 12:04:15,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074113963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:15,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397347050] [2021-08-21 12:04:15,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:15,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:15,040 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:15,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:04:15,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:15,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:15,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:15,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397347050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:15,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:15,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:15,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243828847] [2021-08-21 12:04:15,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:15,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:15,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:15,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:15,760 INFO L87 Difference]: Start difference. First operand 1820 states and 6014 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:15,931 INFO L93 Difference]: Finished difference Result 1994 states and 6256 transitions. [2021-08-21 12:04:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:15,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:15,934 INFO L225 Difference]: With dead ends: 1994 [2021-08-21 12:04:15,934 INFO L226 Difference]: Without dead ends: 1992 [2021-08-21 12:04:15,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-08-21 12:04:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-08-21 12:04:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.304083885209713) internal successors, (5987), 1812 states have internal predecessors, (5987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5987 transitions. [2021-08-21 12:04:15,956 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5987 transitions. Word has length 22 [2021-08-21 12:04:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:15,957 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 5987 transitions. [2021-08-21 12:04:15,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5987 transitions. [2021-08-21 12:04:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:15,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:15,959 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:15,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:16,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 12:04:16,165 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1374950260, now seen corresponding path program 95 times [2021-08-21 12:04:16,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:16,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656591696] [2021-08-21 12:04:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:16,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:16,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:16,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656591696] [2021-08-21 12:04:16,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656591696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:16,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559532753] [2021-08-21 12:04:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:16,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:16,282 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:04:16,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:04:16,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:04:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:16,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559532753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:16,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:16,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:16,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663193942] [2021-08-21 12:04:16,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:16,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:16,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:16,991 INFO L87 Difference]: Start difference. First operand 1813 states and 5987 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:17,055 INFO L93 Difference]: Finished difference Result 2201 states and 6647 transitions. [2021-08-21 12:04:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:17,058 INFO L225 Difference]: With dead ends: 2201 [2021-08-21 12:04:17,058 INFO L226 Difference]: Without dead ends: 2201 [2021-08-21 12:04:17,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-08-21 12:04:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-08-21 12:04:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.303581267217631) internal successors, (5996), 1815 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5996 transitions. [2021-08-21 12:04:17,083 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5996 transitions. Word has length 22 [2021-08-21 12:04:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:17,083 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 5996 transitions. [2021-08-21 12:04:17,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:17,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5996 transitions. [2021-08-21 12:04:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:17,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:17,085 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:17,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:17,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:17,303 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:17,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1364172962, now seen corresponding path program 96 times [2021-08-21 12:04:17,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:17,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950988491] [2021-08-21 12:04:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:17,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:17,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:17,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950988491] [2021-08-21 12:04:17,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950988491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:17,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027127890] [2021-08-21 12:04:17,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:17,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:17,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:17,396 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) [2021-08-21 12:04:17,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:04:18,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:18,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:18,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:18,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027127890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:18,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:18,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:18,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319601757] [2021-08-21 12:04:18,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:18,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:18,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:18,137 INFO L87 Difference]: Start difference. First operand 1816 states and 5996 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:18,331 INFO L93 Difference]: Finished difference Result 1990 states and 6241 transitions. [2021-08-21 12:04:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:04:18,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:18,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:18,334 INFO L225 Difference]: With dead ends: 1990 [2021-08-21 12:04:18,334 INFO L226 Difference]: Without dead ends: 1988 [2021-08-21 12:04:18,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-08-21 12:04:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-08-21 12:04:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.3008264462809915) internal successors, (5991), 1815 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5991 transitions. [2021-08-21 12:04:18,357 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5991 transitions. Word has length 22 [2021-08-21 12:04:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:18,357 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 5991 transitions. [2021-08-21 12:04:18,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5991 transitions. [2021-08-21 12:04:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:18,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:18,359 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:18,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:18,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:18,577 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1209403728, now seen corresponding path program 97 times [2021-08-21 12:04:18,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:18,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753525958] [2021-08-21 12:04:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:18,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:18,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:18,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753525958] [2021-08-21 12:04:18,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753525958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:18,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307288871] [2021-08-21 12:04:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:18,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:18,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:18,670 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) [2021-08-21 12:04:18,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:04:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:19,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:19,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:19,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307288871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:19,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:19,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:19,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823595462] [2021-08-21 12:04:19,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:19,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:19,425 INFO L87 Difference]: Start difference. First operand 1816 states and 5991 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:19,514 INFO L93 Difference]: Finished difference Result 2351 states and 7004 transitions. [2021-08-21 12:04:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:19,518 INFO L225 Difference]: With dead ends: 2351 [2021-08-21 12:04:19,518 INFO L226 Difference]: Without dead ends: 2351 [2021-08-21 12:04:19,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-08-21 12:04:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-08-21 12:04:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2870005627462016) internal successors, (5841), 1777 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5841 transitions. [2021-08-21 12:04:19,542 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5841 transitions. Word has length 22 [2021-08-21 12:04:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:19,542 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 5841 transitions. [2021-08-21 12:04:19,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5841 transitions. [2021-08-21 12:04:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:19,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:19,544 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:19,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:19,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 12:04:19,762 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:19,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:19,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2108875460, now seen corresponding path program 98 times [2021-08-21 12:04:19,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:19,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77182315] [2021-08-21 12:04:19,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:19,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:19,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:19,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77182315] [2021-08-21 12:04:19,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77182315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:19,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141937879] [2021-08-21 12:04:19,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:19,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:19,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:19,859 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) [2021-08-21 12:04:19,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:04:20,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:20,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:20,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:20,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:20,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141937879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:20,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:20,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:20,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535779953] [2021-08-21 12:04:20,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:20,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:20,621 INFO L87 Difference]: Start difference. First operand 1778 states and 5841 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:20,794 INFO L93 Difference]: Finished difference Result 1995 states and 6382 transitions. [2021-08-21 12:04:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:20,797 INFO L225 Difference]: With dead ends: 1995 [2021-08-21 12:04:20,797 INFO L226 Difference]: Without dead ends: 1992 [2021-08-21 12:04:20,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-08-21 12:04:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-08-21 12:04:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2863559797866366) internal successors, (5853), 1781 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5853 transitions. [2021-08-21 12:04:20,817 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5853 transitions. Word has length 22 [2021-08-21 12:04:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:20,817 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 5853 transitions. [2021-08-21 12:04:20,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5853 transitions. [2021-08-21 12:04:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:20,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:20,819 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:20,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:21,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:21,037 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash 280001268, now seen corresponding path program 99 times [2021-08-21 12:04:21,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:21,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889849842] [2021-08-21 12:04:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:21,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:21,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:21,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889849842] [2021-08-21 12:04:21,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889849842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:21,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619454532] [2021-08-21 12:04:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:21,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:21,147 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) [2021-08-21 12:04:21,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:04:21,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:04:21,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:21,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:21,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:21,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619454532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:21,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:21,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:21,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745359859] [2021-08-21 12:04:21,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:21,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:21,942 INFO L87 Difference]: Start difference. First operand 1782 states and 5853 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:22,061 INFO L93 Difference]: Finished difference Result 3202 states and 10139 transitions. [2021-08-21 12:04:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:04:22,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:22,067 INFO L225 Difference]: With dead ends: 3202 [2021-08-21 12:04:22,067 INFO L226 Difference]: Without dead ends: 3202 [2021-08-21 12:04:22,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-08-21 12:04:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-08-21 12:04:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.4375993640699525) internal successors, (8649), 2516 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8649 transitions. [2021-08-21 12:04:22,108 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8649 transitions. Word has length 22 [2021-08-21 12:04:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:22,108 INFO L470 AbstractCegarLoop]: Abstraction has 2517 states and 8649 transitions. [2021-08-21 12:04:22,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8649 transitions. [2021-08-21 12:04:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:22,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:22,111 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:22,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:22,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:04:22,329 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash -411952732, now seen corresponding path program 100 times [2021-08-21 12:04:22,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:22,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546927609] [2021-08-21 12:04:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:22,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:22,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:22,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546927609] [2021-08-21 12:04:22,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546927609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:22,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781370696] [2021-08-21 12:04:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:22,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:22,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:22,457 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) [2021-08-21 12:04:22,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:04:23,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:23,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781370696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:23,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:23,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:23,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175990136] [2021-08-21 12:04:23,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:23,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:23,412 INFO L87 Difference]: Start difference. First operand 2517 states and 8649 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:23,593 INFO L93 Difference]: Finished difference Result 2830 states and 9178 transitions. [2021-08-21 12:04:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:23,598 INFO L225 Difference]: With dead ends: 2830 [2021-08-21 12:04:23,598 INFO L226 Difference]: Without dead ends: 2828 [2021-08-21 12:04:23,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-08-21 12:04:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2556. [2021-08-21 12:04:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 3.4332681017612523) internal successors, (8772), 2555 states have internal predecessors, (8772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 8772 transitions. [2021-08-21 12:04:23,632 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 8772 transitions. Word has length 22 [2021-08-21 12:04:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:23,632 INFO L470 AbstractCegarLoop]: Abstraction has 2556 states and 8772 transitions. [2021-08-21 12:04:23,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 8772 transitions. [2021-08-21 12:04:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:23,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:23,634 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:23,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:23,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 12:04:23,851 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash 251135346, now seen corresponding path program 101 times [2021-08-21 12:04:23,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:23,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250087958] [2021-08-21 12:04:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:23,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:23,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:23,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250087958] [2021-08-21 12:04:23,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250087958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:23,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897947357] [2021-08-21 12:04:23,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:23,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:23,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:23,942 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) [2021-08-21 12:04:23,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:04:24,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:04:24,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:24,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:24,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:24,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897947357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:24,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:24,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:24,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014342932] [2021-08-21 12:04:24,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:24,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:24,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:24,727 INFO L87 Difference]: Start difference. First operand 2556 states and 8772 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:24,876 INFO L93 Difference]: Finished difference Result 2824 states and 9108 transitions. [2021-08-21 12:04:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:04:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:24,880 INFO L225 Difference]: With dead ends: 2824 [2021-08-21 12:04:24,880 INFO L226 Difference]: Without dead ends: 2824 [2021-08-21 12:04:24,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:04:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-08-21 12:04:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2476. [2021-08-21 12:04:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-08-21 12:04:24,913 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-08-21 12:04:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:24,913 INFO L470 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-08-21 12:04:24,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-08-21 12:04:24,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:24,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:24,916 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:24,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:25,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 12:04:25,132 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:25,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1160058756, now seen corresponding path program 102 times [2021-08-21 12:04:25,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:25,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132908635] [2021-08-21 12:04:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:25,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:25,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:25,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132908635] [2021-08-21 12:04:25,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132908635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:25,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331885093] [2021-08-21 12:04:25,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:25,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:25,220 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) [2021-08-21 12:04:25,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:04:25,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:25,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:25,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:25,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331885093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:25,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:25,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:25,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228825237] [2021-08-21 12:04:25,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:25,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:25,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:25,997 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:26,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:26,168 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-08-21 12:04:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:26,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:26,172 INFO L225 Difference]: With dead ends: 2659 [2021-08-21 12:04:26,172 INFO L226 Difference]: Without dead ends: 2657 [2021-08-21 12:04:26,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-08-21 12:04:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-08-21 12:04:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-08-21 12:04:26,203 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-08-21 12:04:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:26,204 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-08-21 12:04:26,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-08-21 12:04:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:26,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:26,206 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:26,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:26,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:26,422 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2026142708, now seen corresponding path program 103 times [2021-08-21 12:04:26,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:26,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373038975] [2021-08-21 12:04:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:26,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:26,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:26,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373038975] [2021-08-21 12:04:26,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373038975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:26,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243021550] [2021-08-21 12:04:26,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:26,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:26,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:26,510 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) [2021-08-21 12:04:26,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:04:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:27,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:27,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:27,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243021550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:27,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:27,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:27,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575329464] [2021-08-21 12:04:27,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:27,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:27,327 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:27,401 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-08-21 12:04:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:27,405 INFO L225 Difference]: With dead ends: 2808 [2021-08-21 12:04:27,406 INFO L226 Difference]: Without dead ends: 2808 [2021-08-21 12:04:27,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-08-21 12:04:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-08-21 12:04:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-08-21 12:04:27,439 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-08-21 12:04:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:27,439 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-08-21 12:04:27,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-08-21 12:04:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:27,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:27,442 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:27,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:27,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:27,659 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2015365410, now seen corresponding path program 104 times [2021-08-21 12:04:27,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:27,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456602514] [2021-08-21 12:04:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:27,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:27,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:27,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456602514] [2021-08-21 12:04:27,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456602514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:27,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726800316] [2021-08-21 12:04:27,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:27,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:27,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:27,751 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) [2021-08-21 12:04:27,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:04:28,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:28,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726800316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:28,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:28,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:28,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390518868] [2021-08-21 12:04:28,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:28,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:28,564 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:28,760 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-08-21 12:04:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:04:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:28,764 INFO L225 Difference]: With dead ends: 2648 [2021-08-21 12:04:28,764 INFO L226 Difference]: Without dead ends: 2646 [2021-08-21 12:04:28,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-08-21 12:04:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-08-21 12:04:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-08-21 12:04:28,851 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-08-21 12:04:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:28,851 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-08-21 12:04:28,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-08-21 12:04:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:28,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:28,854 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:28,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:29,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 12:04:29,071 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:29,072 INFO L82 PathProgramCache]: Analyzing trace with hash -558211280, now seen corresponding path program 105 times [2021-08-21 12:04:29,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:29,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517844281] [2021-08-21 12:04:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:29,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:29,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:29,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517844281] [2021-08-21 12:04:29,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517844281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:29,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718496663] [2021-08-21 12:04:29,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:29,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:29,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:29,161 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) [2021-08-21 12:04:29,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:04:29,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:04:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:29,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718496663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:29,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:29,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:29,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531622948] [2021-08-21 12:04:29,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:29,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:29,769 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:29,860 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-08-21 12:04:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:29,864 INFO L225 Difference]: With dead ends: 2940 [2021-08-21 12:04:29,865 INFO L226 Difference]: Without dead ends: 2940 [2021-08-21 12:04:29,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-08-21 12:04:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-08-21 12:04:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-08-21 12:04:29,898 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-08-21 12:04:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:29,898 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-08-21 12:04:29,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-08-21 12:04:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:29,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:29,901 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:29,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:30,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:30,119 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1534899388, now seen corresponding path program 106 times [2021-08-21 12:04:30,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:30,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727196072] [2021-08-21 12:04:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:30,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:30,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:30,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727196072] [2021-08-21 12:04:30,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727196072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:30,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359304576] [2021-08-21 12:04:30,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:30,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:30,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:30,213 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) [2021-08-21 12:04:30,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:04:31,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:31,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:31,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:31,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:31,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359304576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:31,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:31,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:31,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095666562] [2021-08-21 12:04:31,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:31,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:31,064 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:31,257 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-08-21 12:04:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:31,261 INFO L225 Difference]: With dead ends: 2660 [2021-08-21 12:04:31,261 INFO L226 Difference]: Without dead ends: 2657 [2021-08-21 12:04:31,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-08-21 12:04:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-08-21 12:04:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-08-21 12:04:31,292 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-08-21 12:04:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:31,292 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-08-21 12:04:31,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-08-21 12:04:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:31,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:31,295 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:31,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:31,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:31,513 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash 931193716, now seen corresponding path program 107 times [2021-08-21 12:04:31,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:31,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861553004] [2021-08-21 12:04:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:31,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:31,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:31,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861553004] [2021-08-21 12:04:31,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861553004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:31,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720886406] [2021-08-21 12:04:31,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:31,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:31,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:31,597 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) [2021-08-21 12:04:31,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:04:32,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:04:32,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:32,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:32,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720886406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:32,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:32,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:32,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330948516] [2021-08-21 12:04:32,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:32,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:32,421 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:32,527 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-08-21 12:04:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:32,534 INFO L225 Difference]: With dead ends: 4123 [2021-08-21 12:04:32,534 INFO L226 Difference]: Without dead ends: 4123 [2021-08-21 12:04:32,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:04:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-08-21 12:04:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-08-21 12:04:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-08-21 12:04:32,587 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-08-21 12:04:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:32,587 INFO L470 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-08-21 12:04:32,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-08-21 12:04:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:32,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:32,590 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:32,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:32,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:32,807 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash 76041570, now seen corresponding path program 108 times [2021-08-21 12:04:32,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:32,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484688530] [2021-08-21 12:04:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:32,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:32,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:32,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484688530] [2021-08-21 12:04:32,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484688530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:32,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663682650] [2021-08-21 12:04:32,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:32,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:32,929 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) [2021-08-21 12:04:32,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:04:33,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:33,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663682650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:33,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:33,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:33,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658164009] [2021-08-21 12:04:33,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:33,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:33,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:33,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:33,757 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:33,950 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-08-21 12:04:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:04:33,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:33,957 INFO L225 Difference]: With dead ends: 3810 [2021-08-21 12:04:33,957 INFO L226 Difference]: Without dead ends: 3806 [2021-08-21 12:04:33,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:04:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-08-21 12:04:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-08-21 12:04:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-08-21 12:04:34,009 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-08-21 12:04:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:34,009 INFO L470 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-08-21 12:04:34,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-08-21 12:04:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:34,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:34,012 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:34,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:34,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 12:04:34,230 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -141891664, now seen corresponding path program 109 times [2021-08-21 12:04:34,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:34,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502687043] [2021-08-21 12:04:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:34,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:34,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:34,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502687043] [2021-08-21 12:04:34,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502687043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:34,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844725022] [2021-08-21 12:04:34,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:34,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:34,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:34,318 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) [2021-08-21 12:04:34,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:04:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:35,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:35,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844725022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:35,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:35,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:35,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266667532] [2021-08-21 12:04:35,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:35,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:35,198 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:35,362 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-08-21 12:04:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:04:35,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:35,372 INFO L225 Difference]: With dead ends: 5567 [2021-08-21 12:04:35,372 INFO L226 Difference]: Without dead ends: 5567 [2021-08-21 12:04:35,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-08-21 12:04:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-08-21 12:04:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-08-21 12:04:35,453 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-08-21 12:04:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:35,453 INFO L470 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-08-21 12:04:35,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-08-21 12:04:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:35,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:35,458 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:35,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:35,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:04:35,671 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1699823324, now seen corresponding path program 110 times [2021-08-21 12:04:35,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:35,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320098809] [2021-08-21 12:04:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:35,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:35,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:35,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320098809] [2021-08-21 12:04:35,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320098809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:35,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981686384] [2021-08-21 12:04:35,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:35,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:35,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:35,759 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) [2021-08-21 12:04:35,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:04:36,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:36,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:36,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:36,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981686384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:36,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:36,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:36,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422577071] [2021-08-21 12:04:36,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:36,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:36,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:36,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:36,392 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:36,613 INFO L93 Difference]: Finished difference Result 5230 states and 18222 transitions. [2021-08-21 12:04:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:36,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:36,622 INFO L225 Difference]: With dead ends: 5230 [2021-08-21 12:04:36,622 INFO L226 Difference]: Without dead ends: 5228 [2021-08-21 12:04:36,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-08-21 12:04:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4960. [2021-08-21 12:04:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 3.584190360959871) internal successors, (17774), 4959 states have internal predecessors, (17774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 17774 transitions. [2021-08-21 12:04:36,716 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 17774 transitions. Word has length 22 [2021-08-21 12:04:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:36,716 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 17774 transitions. [2021-08-21 12:04:36,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 17774 transitions. [2021-08-21 12:04:36,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:36,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:36,722 INFO L512 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:36,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:36,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 12:04:36,937 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1036735246, now seen corresponding path program 111 times [2021-08-21 12:04:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:36,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830668263] [2021-08-21 12:04:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:36,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:37,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:37,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830668263] [2021-08-21 12:04:37,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830668263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:37,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923042745] [2021-08-21 12:04:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:37,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:37,033 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) [2021-08-21 12:04:37,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:04:37,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:04:37,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:04:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:38,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923042745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:38,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:38,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-08-21 12:04:38,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608142367] [2021-08-21 12:04:38,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 12:04:38,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:38,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 12:04:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:04:38,033 INFO L87 Difference]: Start difference. First operand 4960 states and 17774 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:39,252 INFO L93 Difference]: Finished difference Result 6422 states and 21501 transitions. [2021-08-21 12:04:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-21 12:04:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 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 22 [2021-08-21 12:04:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:39,263 INFO L225 Difference]: With dead ends: 6422 [2021-08-21 12:04:39,263 INFO L226 Difference]: Without dead ends: 6418 [2021-08-21 12:04:39,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2760 ImplicationChecksByTransitivity, 1005.9ms TimeCoverageRelationStatistics Valid=1147, Invalid=7595, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 12:04:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6418 states. [2021-08-21 12:04:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6418 to 5505. [2021-08-21 12:04:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 5504 states have (on average 3.484738372093023) internal successors, (19180), 5504 states have internal predecessors, (19180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 19180 transitions. [2021-08-21 12:04:39,354 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 19180 transitions. Word has length 22 [2021-08-21 12:04:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:39,355 INFO L470 AbstractCegarLoop]: Abstraction has 5505 states and 19180 transitions. [2021-08-21 12:04:39,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 19180 transitions. [2021-08-21 12:04:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:39,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:39,359 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:39,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 12:04:39,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 12:04:39,566 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:39,566 INFO L82 PathProgramCache]: Analyzing trace with hash 738272116, now seen corresponding path program 112 times [2021-08-21 12:04:39,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:39,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556886997] [2021-08-21 12:04:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:39,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:39,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:39,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556886997] [2021-08-21 12:04:39,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556886997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:39,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855676613] [2021-08-21 12:04:39,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:39,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:39,640 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) [2021-08-21 12:04:39,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:04:40,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:40,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:40,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:40,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855676613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:40,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:40,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:40,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627741840] [2021-08-21 12:04:40,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:40,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:40,354 INFO L87 Difference]: Start difference. First operand 5505 states and 19180 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:40,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:40,439 INFO L93 Difference]: Finished difference Result 5965 states and 19849 transitions. [2021-08-21 12:04:40,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:04:40,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:40,451 INFO L225 Difference]: With dead ends: 5965 [2021-08-21 12:04:40,451 INFO L226 Difference]: Without dead ends: 5965 [2021-08-21 12:04:40,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2021-08-21 12:04:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 5516. [2021-08-21 12:04:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 3.469628286491387) internal successors, (19135), 5515 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 19135 transitions. [2021-08-21 12:04:40,539 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 19135 transitions. Word has length 22 [2021-08-21 12:04:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:40,539 INFO L470 AbstractCegarLoop]: Abstraction has 5516 states and 19135 transitions. [2021-08-21 12:04:40,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 19135 transitions. [2021-08-21 12:04:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:40,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:40,544 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:40,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:40,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:40,762 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:40,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1846081872, now seen corresponding path program 113 times [2021-08-21 12:04:40,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:40,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632054295] [2021-08-21 12:04:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:40,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:40,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:40,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632054295] [2021-08-21 12:04:40,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632054295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:40,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706209822] [2021-08-21 12:04:40,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:40,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:40,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:40,861 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) [2021-08-21 12:04:40,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:04:41,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:04:41,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:41,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:41,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706209822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:41,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:41,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:41,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650042698] [2021-08-21 12:04:41,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:41,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:41,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:41,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:41,769 INFO L87 Difference]: Start difference. First operand 5516 states and 19135 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:41,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:41,871 INFO L93 Difference]: Finished difference Result 6093 states and 20114 transitions. [2021-08-21 12:04:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:41,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:41,881 INFO L225 Difference]: With dead ends: 6093 [2021-08-21 12:04:41,881 INFO L226 Difference]: Without dead ends: 6093 [2021-08-21 12:04:41,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6093 states. [2021-08-21 12:04:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6093 to 5328. [2021-08-21 12:04:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5327 states have (on average 3.456354420874789) internal successors, (18412), 5327 states have internal predecessors, (18412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 18412 transitions. [2021-08-21 12:04:42,026 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 18412 transitions. Word has length 22 [2021-08-21 12:04:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:42,026 INFO L470 AbstractCegarLoop]: Abstraction has 5328 states and 18412 transitions. [2021-08-21 12:04:42,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 18412 transitions. [2021-08-21 12:04:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:42,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:42,031 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:42,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:42,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:42,248 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -356676876, now seen corresponding path program 114 times [2021-08-21 12:04:42,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:42,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557636904] [2021-08-21 12:04:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:42,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:42,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:42,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557636904] [2021-08-21 12:04:42,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557636904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:42,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472938114] [2021-08-21 12:04:42,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:42,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:42,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:42,336 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) [2021-08-21 12:04:42,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:04:43,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:43,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:43,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472938114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:43,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:43,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:43,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5905866] [2021-08-21 12:04:43,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:43,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:43,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:43,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:43,233 INFO L87 Difference]: Start difference. First operand 5328 states and 18412 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:43,356 INFO L93 Difference]: Finished difference Result 9312 states and 32126 transitions. [2021-08-21 12:04:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:43,375 INFO L225 Difference]: With dead ends: 9312 [2021-08-21 12:04:43,375 INFO L226 Difference]: Without dead ends: 9312 [2021-08-21 12:04:43,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:04:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-08-21 12:04:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 8595. [2021-08-21 12:04:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 3.5828484989527576) internal successors, (30791), 8594 states have internal predecessors, (30791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 30791 transitions. [2021-08-21 12:04:43,650 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 30791 transitions. Word has length 22 [2021-08-21 12:04:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:43,650 INFO L470 AbstractCegarLoop]: Abstraction has 8595 states and 30791 transitions. [2021-08-21 12:04:43,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 30791 transitions. [2021-08-21 12:04:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:43,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:43,655 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:43,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:43,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 12:04:43,873 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:43,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1429762256, now seen corresponding path program 115 times [2021-08-21 12:04:43,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:43,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500868232] [2021-08-21 12:04:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:43,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:43,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:43,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500868232] [2021-08-21 12:04:43,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500868232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:43,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863133080] [2021-08-21 12:04:43,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:43,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:43,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:43,963 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) [2021-08-21 12:04:43,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:04:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:44,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:44,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:44,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863133080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:44,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:44,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:44,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017959151] [2021-08-21 12:04:44,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:44,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:44,868 INFO L87 Difference]: Start difference. First operand 8595 states and 30791 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:45,034 INFO L93 Difference]: Finished difference Result 12018 states and 42312 transitions. [2021-08-21 12:04:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:04:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:45,059 INFO L225 Difference]: With dead ends: 12018 [2021-08-21 12:04:45,059 INFO L226 Difference]: Without dead ends: 12018 [2021-08-21 12:04:45,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:04:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12018 states. [2021-08-21 12:04:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12018 to 11262. [2021-08-21 12:04:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11262 states, 11261 states have (on average 3.630583429535565) internal successors, (40884), 11261 states have internal predecessors, (40884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11262 states to 11262 states and 40884 transitions. [2021-08-21 12:04:45,392 INFO L78 Accepts]: Start accepts. Automaton has 11262 states and 40884 transitions. Word has length 22 [2021-08-21 12:04:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:45,392 INFO L470 AbstractCegarLoop]: Abstraction has 11262 states and 40884 transitions. [2021-08-21 12:04:45,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 11262 states and 40884 transitions. [2021-08-21 12:04:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:45,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:45,398 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:45,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:45,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:45,616 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash -335670668, now seen corresponding path program 116 times [2021-08-21 12:04:45,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:45,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307069845] [2021-08-21 12:04:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:45,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:45,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:45,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307069845] [2021-08-21 12:04:45,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307069845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:45,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201629850] [2021-08-21 12:04:45,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:45,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:45,710 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) [2021-08-21 12:04:45,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:04:46,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:46,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:46,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201629850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:46,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:46,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:04:46,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109046053] [2021-08-21 12:04:46,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:46,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:46,607 INFO L87 Difference]: Start difference. First operand 11262 states and 40884 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:46,852 INFO L93 Difference]: Finished difference Result 14897 states and 52797 transitions. [2021-08-21 12:04:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:46,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:46,885 INFO L225 Difference]: With dead ends: 14897 [2021-08-21 12:04:46,885 INFO L226 Difference]: Without dead ends: 14897 [2021-08-21 12:04:46,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:04:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14897 states. [2021-08-21 12:04:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14897 to 13777. [2021-08-21 12:04:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 3.657665505226481) internal successors, (50388), 13776 states have internal predecessors, (50388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 50388 transitions. [2021-08-21 12:04:47,328 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 50388 transitions. Word has length 22 [2021-08-21 12:04:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:47,328 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 50388 transitions. [2021-08-21 12:04:47,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 50388 transitions. [2021-08-21 12:04:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:47,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:47,335 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:47,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:47,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:47,553 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1325861284, now seen corresponding path program 117 times [2021-08-21 12:04:47,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:47,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573314907] [2021-08-21 12:04:47,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:47,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:47,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:47,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573314907] [2021-08-21 12:04:47,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573314907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:47,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984381683] [2021-08-21 12:04:47,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:47,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:47,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:47,637 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) [2021-08-21 12:04:47,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:04:48,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:04:48,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:48,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984381683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:48,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:48,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:48,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38498321] [2021-08-21 12:04:48,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:48,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:48,543 INFO L87 Difference]: Start difference. First operand 13777 states and 50388 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:48,761 INFO L93 Difference]: Finished difference Result 14797 states and 53395 transitions. [2021-08-21 12:04:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:04:48,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:48,794 INFO L225 Difference]: With dead ends: 14797 [2021-08-21 12:04:48,795 INFO L226 Difference]: Without dead ends: 14795 [2021-08-21 12:04:48,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14795 states. [2021-08-21 12:04:49,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14795 to 14462. [2021-08-21 12:04:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14462 states, 14461 states have (on average 3.6439388700643107) internal successors, (52695), 14461 states have internal predecessors, (52695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14462 states to 14462 states and 52695 transitions. [2021-08-21 12:04:49,200 INFO L78 Accepts]: Start accepts. Automaton has 14462 states and 52695 transitions. Word has length 22 [2021-08-21 12:04:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:49,200 INFO L470 AbstractCegarLoop]: Abstraction has 14462 states and 52695 transitions. [2021-08-21 12:04:49,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14462 states and 52695 transitions. [2021-08-21 12:04:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:49,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:49,207 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:49,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:49,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:49,425 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:49,425 INFO L82 PathProgramCache]: Analyzing trace with hash -531010572, now seen corresponding path program 118 times [2021-08-21 12:04:49,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:49,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462683780] [2021-08-21 12:04:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:49,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:49,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:49,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462683780] [2021-08-21 12:04:49,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462683780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:49,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949907435] [2021-08-21 12:04:49,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:49,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:49,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:49,623 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) [2021-08-21 12:04:49,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:04:50,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:50,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:50,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:50,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:50,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949907435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:50,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:50,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:04:50,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615589417] [2021-08-21 12:04:50,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:04:50,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:50,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:04:50,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:04:50,588 INFO L87 Difference]: Start difference. First operand 14462 states and 52695 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:50,706 INFO L93 Difference]: Finished difference Result 14786 states and 52723 transitions. [2021-08-21 12:04:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:04:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:50,743 INFO L225 Difference]: With dead ends: 14786 [2021-08-21 12:04:50,743 INFO L226 Difference]: Without dead ends: 14786 [2021-08-21 12:04:50,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14786 states. [2021-08-21 12:04:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14786 to 14158. [2021-08-21 12:04:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14158 states, 14157 states have (on average 3.6305008123189944) internal successors, (51397), 14157 states have internal predecessors, (51397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14158 states to 14158 states and 51397 transitions. [2021-08-21 12:04:51,095 INFO L78 Accepts]: Start accepts. Automaton has 14158 states and 51397 transitions. Word has length 22 [2021-08-21 12:04:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:51,095 INFO L470 AbstractCegarLoop]: Abstraction has 14158 states and 51397 transitions. [2021-08-21 12:04:51,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14158 states and 51397 transitions. [2021-08-21 12:04:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:51,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:51,101 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:51,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:51,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:51,319 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:51,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:51,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1179602736, now seen corresponding path program 119 times [2021-08-21 12:04:51,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:51,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342604400] [2021-08-21 12:04:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:51,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:51,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:51,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342604400] [2021-08-21 12:04:51,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342604400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:51,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262554220] [2021-08-21 12:04:51,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:51,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:51,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:51,408 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) [2021-08-21 12:04:51,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:04:52,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:04:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:52,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:52,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262554220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:52,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:52,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:04:52,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939593062] [2021-08-21 12:04:52,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:52,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:52,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:52,529 INFO L87 Difference]: Start difference. First operand 14158 states and 51397 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:52,662 INFO L93 Difference]: Finished difference Result 15147 states and 53586 transitions. [2021-08-21 12:04:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:04:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:52,694 INFO L225 Difference]: With dead ends: 15147 [2021-08-21 12:04:52,694 INFO L226 Difference]: Without dead ends: 15147 [2021-08-21 12:04:52,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:04:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15147 states. [2021-08-21 12:04:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15147 to 13944. [2021-08-21 12:04:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13944 states, 13943 states have (on average 3.6136412536756795) internal successors, (50385), 13943 states have internal predecessors, (50385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13944 states to 13944 states and 50385 transitions. [2021-08-21 12:04:53,061 INFO L78 Accepts]: Start accepts. Automaton has 13944 states and 50385 transitions. Word has length 22 [2021-08-21 12:04:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:53,062 INFO L470 AbstractCegarLoop]: Abstraction has 13944 states and 50385 transitions. [2021-08-21 12:04:53,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 13944 states and 50385 transitions. [2021-08-21 12:04:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:53,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:53,068 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:53,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:53,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 12:04:53,284 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:53,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1625959564, now seen corresponding path program 120 times [2021-08-21 12:04:53,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:53,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193753895] [2021-08-21 12:04:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:53,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:53,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:53,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193753895] [2021-08-21 12:04:53,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193753895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:53,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113977166] [2021-08-21 12:04:53,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:53,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:53,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:53,375 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) [2021-08-21 12:04:53,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:04:54,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:54,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:54,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:54,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:54,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113977166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:54,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:54,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:04:54,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622515586] [2021-08-21 12:04:54,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:54,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:54,422 INFO L87 Difference]: Start difference. First operand 13944 states and 50385 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:54,609 INFO L93 Difference]: Finished difference Result 24461 states and 88972 transitions. [2021-08-21 12:04:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:04:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:54,673 INFO L225 Difference]: With dead ends: 24461 [2021-08-21 12:04:54,674 INFO L226 Difference]: Without dead ends: 24461 [2021-08-21 12:04:54,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:04:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24461 states. [2021-08-21 12:04:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24461 to 23801. [2021-08-21 12:04:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23801 states, 23800 states have (on average 3.685378151260504) internal successors, (87712), 23800 states have internal predecessors, (87712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23801 states to 23801 states and 87712 transitions. [2021-08-21 12:04:55,383 INFO L78 Accepts]: Start accepts. Automaton has 23801 states and 87712 transitions. Word has length 22 [2021-08-21 12:04:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:55,383 INFO L470 AbstractCegarLoop]: Abstraction has 23801 states and 87712 transitions. [2021-08-21 12:04:55,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 23801 states and 87712 transitions. [2021-08-21 12:04:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:55,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:55,389 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:55,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:55,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 12:04:55,606 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:55,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1595922352, now seen corresponding path program 121 times [2021-08-21 12:04:55,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:55,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255330571] [2021-08-21 12:04:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:55,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:55,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:55,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255330571] [2021-08-21 12:04:55,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255330571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:55,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714043707] [2021-08-21 12:04:55,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:55,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:55,680 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) [2021-08-21 12:04:55,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:04:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:56,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:56,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714043707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:56,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:56,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:04:56,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027902207] [2021-08-21 12:04:56,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:56,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:56,706 INFO L87 Difference]: Start difference. First operand 23801 states and 87712 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:56,996 INFO L93 Difference]: Finished difference Result 29931 states and 109808 transitions. [2021-08-21 12:04:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:04:56,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:57,080 INFO L225 Difference]: With dead ends: 29931 [2021-08-21 12:04:57,080 INFO L226 Difference]: Without dead ends: 29931 [2021-08-21 12:04:57,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:04:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29931 states. [2021-08-21 12:04:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29931 to 29420. [2021-08-21 12:04:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29420 states, 29419 states have (on average 3.704578673646283) internal successors, (108985), 29419 states have internal predecessors, (108985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29420 states to 29420 states and 108985 transitions. [2021-08-21 12:04:58,036 INFO L78 Accepts]: Start accepts. Automaton has 29420 states and 108985 transitions. Word has length 22 [2021-08-21 12:04:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:58,036 INFO L470 AbstractCegarLoop]: Abstraction has 29420 states and 108985 transitions. [2021-08-21 12:04:58,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 29420 states and 108985 transitions. [2021-08-21 12:04:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:04:58,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:58,043 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:58,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:58,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:58,261 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:58,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1604953356, now seen corresponding path program 122 times [2021-08-21 12:04:58,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:58,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412570898] [2021-08-21 12:04:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:58,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:58,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:58,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412570898] [2021-08-21 12:04:58,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412570898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:58,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707551462] [2021-08-21 12:04:58,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:58,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:58,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:58,356 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) [2021-08-21 12:04:58,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:04:59,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:59,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:59,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:04:59,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:59,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707551462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:59,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:59,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:04:59,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114389918] [2021-08-21 12:04:59,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:04:59,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:04:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:04:59,425 INFO L87 Difference]: Start difference. First operand 29420 states and 108985 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:59,749 INFO L93 Difference]: Finished difference Result 32137 states and 117885 transitions. [2021-08-21 12:04:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:04:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:04:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:59,941 INFO L225 Difference]: With dead ends: 32137 [2021-08-21 12:04:59,941 INFO L226 Difference]: Without dead ends: 32137 [2021-08-21 12:04:59,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:04:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32137 states. [2021-08-21 12:05:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32137 to 31599. [2021-08-21 12:05:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31599 states, 31598 states have (on average 3.7039053104626873) internal successors, (117036), 31598 states have internal predecessors, (117036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31599 states to 31599 states and 117036 transitions. [2021-08-21 12:05:01,038 INFO L78 Accepts]: Start accepts. Automaton has 31599 states and 117036 transitions. Word has length 22 [2021-08-21 12:05:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:01,038 INFO L470 AbstractCegarLoop]: Abstraction has 31599 states and 117036 transitions. [2021-08-21 12:05:01,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 31599 states and 117036 transitions. [2021-08-21 12:05:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:01,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:01,046 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:01,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:01,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 12:05:01,261 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2047852496, now seen corresponding path program 123 times [2021-08-21 12:05:01,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:01,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12142645] [2021-08-21 12:05:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:01,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:01,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:01,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12142645] [2021-08-21 12:05:01,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12142645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:01,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182210948] [2021-08-21 12:05:01,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:01,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:01,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:01,386 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) [2021-08-21 12:05:01,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:05:02,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:05:02,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:02,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182210948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:02,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:02,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:02,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230399145] [2021-08-21 12:05:02,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:02,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:02,555 INFO L87 Difference]: Start difference. First operand 31599 states and 117036 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:03,121 INFO L93 Difference]: Finished difference Result 33773 states and 123595 transitions. [2021-08-21 12:05:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:05:03,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:03,246 INFO L225 Difference]: With dead ends: 33773 [2021-08-21 12:05:03,246 INFO L226 Difference]: Without dead ends: 33773 [2021-08-21 12:05:03,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:05:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33773 states. [2021-08-21 12:05:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33773 to 32987. [2021-08-21 12:05:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32987 states, 32986 states have (on average 3.7019341538834656) internal successors, (122112), 32986 states have internal predecessors, (122112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32987 states to 32987 states and 122112 transitions. [2021-08-21 12:05:04,415 INFO L78 Accepts]: Start accepts. Automaton has 32987 states and 122112 transitions. Word has length 22 [2021-08-21 12:05:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:04,415 INFO L470 AbstractCegarLoop]: Abstraction has 32987 states and 122112 transitions. [2021-08-21 12:05:04,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:04,416 INFO L276 IsEmpty]: Start isEmpty. Operand 32987 states and 122112 transitions. [2021-08-21 12:05:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:04,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:04,426 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:04,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:04,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 12:05:04,641 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1731940364, now seen corresponding path program 124 times [2021-08-21 12:05:04,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:04,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690825194] [2021-08-21 12:05:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:04,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:05:04,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:04,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690825194] [2021-08-21 12:05:04,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690825194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:04,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191161843] [2021-08-21 12:05:04,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:04,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:04,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:04,726 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) [2021-08-21 12:05:04,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:05:05,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:05,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:05:05,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191161843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:05,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:05,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:05:05,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234022322] [2021-08-21 12:05:05,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:05:05,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:05,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:05:05,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:05:05,986 INFO L87 Difference]: Start difference. First operand 32987 states and 122112 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:06,433 INFO L93 Difference]: Finished difference Result 37724 states and 139194 transitions. [2021-08-21 12:05:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:05:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:06,569 INFO L225 Difference]: With dead ends: 37724 [2021-08-21 12:05:06,569 INFO L226 Difference]: Without dead ends: 37720 [2021-08-21 12:05:06,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:05:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37720 states. [2021-08-21 12:05:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37720 to 37452. [2021-08-21 12:05:07,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37452 states, 37451 states have (on average 3.707671357240127) internal successors, (138856), 37451 states have internal predecessors, (138856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37452 states to 37452 states and 138856 transitions. [2021-08-21 12:05:07,918 INFO L78 Accepts]: Start accepts. Automaton has 37452 states and 138856 transitions. Word has length 22 [2021-08-21 12:05:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:07,918 INFO L470 AbstractCegarLoop]: Abstraction has 37452 states and 138856 transitions. [2021-08-21 12:05:07,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 37452 states and 138856 transitions. [2021-08-21 12:05:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:07,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:07,928 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:07,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:08,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 12:05:08,147 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1700926988, now seen corresponding path program 125 times [2021-08-21 12:05:08,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:08,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804967761] [2021-08-21 12:05:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:08,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:08,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:08,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804967761] [2021-08-21 12:05:08,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804967761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:08,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711082304] [2021-08-21 12:05:08,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:08,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:08,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:08,217 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) [2021-08-21 12:05:08,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:05:09,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:05:09,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:05:09,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711082304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:09,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:09,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:05:09,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010805238] [2021-08-21 12:05:09,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:05:09,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:09,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:05:09,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:05:09,669 INFO L87 Difference]: Start difference. First operand 37452 states and 138856 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:10,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:10,019 INFO L93 Difference]: Finished difference Result 39652 states and 145615 transitions. [2021-08-21 12:05:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:05:10,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 22 [2021-08-21 12:05:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:10,159 INFO L225 Difference]: With dead ends: 39652 [2021-08-21 12:05:10,159 INFO L226 Difference]: Without dead ends: 39652 [2021-08-21 12:05:10,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:05:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39652 states. [2021-08-21 12:05:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39652 to 38970. [2021-08-21 12:05:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38970 states, 38969 states have (on average 3.7050476019400036) internal successors, (144382), 38969 states have internal predecessors, (144382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38970 states to 38970 states and 144382 transitions. [2021-08-21 12:05:11,587 INFO L78 Accepts]: Start accepts. Automaton has 38970 states and 144382 transitions. Word has length 22 [2021-08-21 12:05:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:11,588 INFO L470 AbstractCegarLoop]: Abstraction has 38970 states and 144382 transitions. [2021-08-21 12:05:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 38970 states and 144382 transitions. [2021-08-21 12:05:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:11,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:11,598 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:11,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:11,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 12:05:11,814 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash -606835400, now seen corresponding path program 126 times [2021-08-21 12:05:11,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:11,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531885303] [2021-08-21 12:05:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:11,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:11,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:11,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531885303] [2021-08-21 12:05:11,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531885303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:11,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195736631] [2021-08-21 12:05:11,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:11,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:11,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:11,902 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) [2021-08-21 12:05:11,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:05:13,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:05:13,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:13,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195736631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:13,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:13,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:05:13,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638326503] [2021-08-21 12:05:13,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:05:13,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:05:13,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:05:13,256 INFO L87 Difference]: Start difference. First operand 38970 states and 144382 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:13,821 INFO L93 Difference]: Finished difference Result 48804 states and 179378 transitions. [2021-08-21 12:05:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:05:13,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:13,992 INFO L225 Difference]: With dead ends: 48804 [2021-08-21 12:05:13,992 INFO L226 Difference]: Without dead ends: 48804 [2021-08-21 12:05:13,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:05:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48804 states. [2021-08-21 12:05:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48804 to 47244. [2021-08-21 12:05:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47244 states, 47243 states have (on average 3.7153864064517497) internal successors, (175526), 47243 states have internal predecessors, (175526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47244 states to 47244 states and 175526 transitions. [2021-08-21 12:05:16,087 INFO L78 Accepts]: Start accepts. Automaton has 47244 states and 175526 transitions. Word has length 22 [2021-08-21 12:05:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:16,087 INFO L470 AbstractCegarLoop]: Abstraction has 47244 states and 175526 transitions. [2021-08-21 12:05:16,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:16,087 INFO L276 IsEmpty]: Start isEmpty. Operand 47244 states and 175526 transitions. [2021-08-21 12:05:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:16,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:16,101 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:16,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:16,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:16,317 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:16,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1679920780, now seen corresponding path program 127 times [2021-08-21 12:05:16,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:16,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733183977] [2021-08-21 12:05:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:16,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:16,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:16,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733183977] [2021-08-21 12:05:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733183977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:16,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33971721] [2021-08-21 12:05:16,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:16,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:16,392 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) [2021-08-21 12:05:16,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:05:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:17,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:17,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33971721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:17,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:17,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:05:17,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481881515] [2021-08-21 12:05:17,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:05:17,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:05:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:05:17,515 INFO L87 Difference]: Start difference. First operand 47244 states and 175526 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:17,959 INFO L93 Difference]: Finished difference Result 50459 states and 186193 transitions. [2021-08-21 12:05:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:05:17,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:18,340 INFO L225 Difference]: With dead ends: 50459 [2021-08-21 12:05:18,340 INFO L226 Difference]: Without dead ends: 50459 [2021-08-21 12:05:18,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:05:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50459 states. [2021-08-21 12:05:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50459 to 49796. [2021-08-21 12:05:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49796 states, 49795 states have (on average 3.7161361582488204) internal successors, (185045), 49795 states have internal predecessors, (185045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49796 states to 49796 states and 185045 transitions. [2021-08-21 12:05:20,002 INFO L78 Accepts]: Start accepts. Automaton has 49796 states and 185045 transitions. Word has length 22 [2021-08-21 12:05:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:20,002 INFO L470 AbstractCegarLoop]: Abstraction has 49796 states and 185045 transitions. [2021-08-21 12:05:20,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 49796 states and 185045 transitions. [2021-08-21 12:05:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:20,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:20,013 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:20,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:20,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:20,221 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:20,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1049734540, now seen corresponding path program 128 times [2021-08-21 12:05:20,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:20,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488552532] [2021-08-21 12:05:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:20,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:20,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:20,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488552532] [2021-08-21 12:05:20,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488552532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:20,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534169534] [2021-08-21 12:05:20,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:20,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:20,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:20,298 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) [2021-08-21 12:05:20,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:05:21,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:21,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:21,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534169534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:21,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:21,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:21,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662259142] [2021-08-21 12:05:21,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:21,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:21,556 INFO L87 Difference]: Start difference. First operand 49796 states and 185045 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:22,114 INFO L93 Difference]: Finished difference Result 56416 states and 206887 transitions. [2021-08-21 12:05:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:22,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:22,335 INFO L225 Difference]: With dead ends: 56416 [2021-08-21 12:05:22,335 INFO L226 Difference]: Without dead ends: 56416 [2021-08-21 12:05:22,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:05:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56416 states. [2021-08-21 12:05:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56416 to 46910. [2021-08-21 12:05:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46910 states, 46909 states have (on average 3.703297874608284) internal successors, (173718), 46909 states have internal predecessors, (173718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46910 states to 46910 states and 173718 transitions. [2021-08-21 12:05:24,406 INFO L78 Accepts]: Start accepts. Automaton has 46910 states and 173718 transitions. Word has length 22 [2021-08-21 12:05:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:24,406 INFO L470 AbstractCegarLoop]: Abstraction has 46910 states and 173718 transitions. [2021-08-21 12:05:24,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 46910 states and 173718 transitions. [2021-08-21 12:05:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:24,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:24,418 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:24,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 12:05:24,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-21 12:05:24,618 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2122819920, now seen corresponding path program 129 times [2021-08-21 12:05:24,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:24,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92251842] [2021-08-21 12:05:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:24,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:24,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:24,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92251842] [2021-08-21 12:05:24,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92251842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:24,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338156666] [2021-08-21 12:05:24,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:24,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:24,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:24,706 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) [2021-08-21 12:05:24,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:05:25,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:05:25,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:25,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:25,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338156666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:25,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:25,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:25,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77604377] [2021-08-21 12:05:25,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:25,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:25,907 INFO L87 Difference]: Start difference. First operand 46910 states and 173718 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:26,376 INFO L93 Difference]: Finished difference Result 54126 states and 199337 transitions. [2021-08-21 12:05:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:05:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:26,586 INFO L225 Difference]: With dead ends: 54126 [2021-08-21 12:05:26,586 INFO L226 Difference]: Without dead ends: 54126 [2021-08-21 12:05:26,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54126 states. [2021-08-21 12:05:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54126 to 50918. [2021-08-21 12:05:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50918 states, 50917 states have (on average 3.7099397057957066) internal successors, (188899), 50917 states have internal predecessors, (188899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50918 states to 50918 states and 188899 transitions. [2021-08-21 12:05:28,526 INFO L78 Accepts]: Start accepts. Automaton has 50918 states and 188899 transitions. Word has length 22 [2021-08-21 12:05:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:28,526 INFO L470 AbstractCegarLoop]: Abstraction has 50918 states and 188899 transitions. [2021-08-21 12:05:28,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 50918 states and 188899 transitions. [2021-08-21 12:05:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:28,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:28,536 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:28,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:28,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:28,753 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:28,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1028728332, now seen corresponding path program 130 times [2021-08-21 12:05:28,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:28,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808102366] [2021-08-21 12:05:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:28,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:28,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:28,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808102366] [2021-08-21 12:05:28,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808102366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:28,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250566694] [2021-08-21 12:05:28,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:28,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:28,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:28,836 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:28,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:05:30,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:30,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:30,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:30,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250566694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:30,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:30,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:30,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880533257] [2021-08-21 12:05:30,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:30,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:30,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:30,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:30,139 INFO L87 Difference]: Start difference. First operand 50918 states and 188899 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:30,848 INFO L93 Difference]: Finished difference Result 52755 states and 194320 transitions. [2021-08-21 12:05:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:05:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:31,071 INFO L225 Difference]: With dead ends: 52755 [2021-08-21 12:05:31,071 INFO L226 Difference]: Without dead ends: 52755 [2021-08-21 12:05:31,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:05:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52755 states. [2021-08-21 12:05:32,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52755 to 52056. [2021-08-21 12:05:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52056 states, 52055 states have (on average 3.710364038036692) internal successors, (193143), 52055 states have internal predecessors, (193143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52056 states to 52056 states and 193143 transitions. [2021-08-21 12:05:32,732 INFO L78 Accepts]: Start accepts. Automaton has 52056 states and 193143 transitions. Word has length 22 [2021-08-21 12:05:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:32,732 INFO L470 AbstractCegarLoop]: Abstraction has 52056 states and 193143 transitions. [2021-08-21 12:05:32,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 52056 states and 193143 transitions. [2021-08-21 12:05:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:32,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:32,742 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:32,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:32,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:32,960 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1894705992, now seen corresponding path program 131 times [2021-08-21 12:05:32,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:32,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202371153] [2021-08-21 12:05:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:32,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:33,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:33,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202371153] [2021-08-21 12:05:33,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202371153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:33,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573378614] [2021-08-21 12:05:33,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:33,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:33,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:33,048 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:33,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:05:34,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:05:34,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:34,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:34,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:34,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573378614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:34,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:34,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:34,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149486586] [2021-08-21 12:05:34,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:34,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:34,242 INFO L87 Difference]: Start difference. First operand 52056 states and 193143 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:34,791 INFO L93 Difference]: Finished difference Result 55237 states and 201943 transitions. [2021-08-21 12:05:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:35,000 INFO L225 Difference]: With dead ends: 55237 [2021-08-21 12:05:35,000 INFO L226 Difference]: Without dead ends: 55237 [2021-08-21 12:05:35,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55237 states. [2021-08-21 12:05:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55237 to 20600. [2021-08-21 12:05:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20600 states, 20599 states have (on average 3.5929899509684935) internal successors, (74012), 20599 states have internal predecessors, (74012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20600 states to 20600 states and 74012 transitions. [2021-08-21 12:05:36,305 INFO L78 Accepts]: Start accepts. Automaton has 20600 states and 74012 transitions. Word has length 22 [2021-08-21 12:05:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:36,305 INFO L470 AbstractCegarLoop]: Abstraction has 20600 states and 74012 transitions. [2021-08-21 12:05:36,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 20600 states and 74012 transitions. [2021-08-21 12:05:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:36,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:36,314 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:36,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:36,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 12:05:36,533 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1327175924, now seen corresponding path program 132 times [2021-08-21 12:05:36,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:36,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404773178] [2021-08-21 12:05:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:36,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:36,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:36,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404773178] [2021-08-21 12:05:36,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404773178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:36,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675093888] [2021-08-21 12:05:36,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:36,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:36,625 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:36,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:05:37,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:05:37,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:37,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:37,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:37,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675093888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:37,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:37,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:37,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697758317] [2021-08-21 12:05:37,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:37,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:37,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:37,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:37,658 INFO L87 Difference]: Start difference. First operand 20600 states and 74012 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:37,922 INFO L93 Difference]: Finished difference Result 29132 states and 104215 transitions. [2021-08-21 12:05:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:37,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:38,022 INFO L225 Difference]: With dead ends: 29132 [2021-08-21 12:05:38,022 INFO L226 Difference]: Without dead ends: 29132 [2021-08-21 12:05:38,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29132 states. [2021-08-21 12:05:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29132 to 20371. [2021-08-21 12:05:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20371 states, 20370 states have (on average 3.595434462444772) internal successors, (73239), 20370 states have internal predecessors, (73239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20371 states to 20371 states and 73239 transitions. [2021-08-21 12:05:38,731 INFO L78 Accepts]: Start accepts. Automaton has 20371 states and 73239 transitions. Word has length 22 [2021-08-21 12:05:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:38,731 INFO L470 AbstractCegarLoop]: Abstraction has 20371 states and 73239 transitions. [2021-08-21 12:05:38,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 20371 states and 73239 transitions. [2021-08-21 12:05:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:38,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:38,739 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:38,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 12:05:38,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 12:05:38,954 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1873699784, now seen corresponding path program 133 times [2021-08-21 12:05:38,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:38,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256889316] [2021-08-21 12:05:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:38,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:39,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:39,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256889316] [2021-08-21 12:05:39,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256889316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:39,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828450234] [2021-08-21 12:05:39,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:39,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:39,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:39,041 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:39,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:05:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:40,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:40,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828450234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:40,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:40,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:40,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371253581] [2021-08-21 12:05:40,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:40,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:40,097 INFO L87 Difference]: Start difference. First operand 20371 states and 73239 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:40,392 INFO L93 Difference]: Finished difference Result 22358 states and 79249 transitions. [2021-08-21 12:05:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:05:40,392 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:40,446 INFO L225 Difference]: With dead ends: 22358 [2021-08-21 12:05:40,446 INFO L226 Difference]: Without dead ends: 22358 [2021-08-21 12:05:40,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:05:40,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22358 states. [2021-08-21 12:05:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22358 to 20431. [2021-08-21 12:05:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20431 states, 20430 states have (on average 3.599216837983358) internal successors, (73532), 20430 states have internal predecessors, (73532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20431 states to 20431 states and 73532 transitions. [2021-08-21 12:05:40,903 INFO L78 Accepts]: Start accepts. Automaton has 20431 states and 73532 transitions. Word has length 22 [2021-08-21 12:05:40,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:40,903 INFO L470 AbstractCegarLoop]: Abstraction has 20431 states and 73532 transitions. [2021-08-21 12:05:40,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:40,904 INFO L276 IsEmpty]: Start isEmpty. Operand 20431 states and 73532 transitions. [2021-08-21 12:05:40,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:40,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:40,912 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:40,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:41,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 12:05:41,130 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1978368372, now seen corresponding path program 134 times [2021-08-21 12:05:41,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:41,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495202828] [2021-08-21 12:05:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:41,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:41,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:41,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495202828] [2021-08-21 12:05:41,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495202828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:41,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186853298] [2021-08-21 12:05:41,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:41,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:41,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:41,302 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:41,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:05:42,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:42,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:42,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:42,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186853298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:42,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:42,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:05:42,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495044337] [2021-08-21 12:05:42,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:42,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:42,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:42,338 INFO L87 Difference]: Start difference. First operand 20431 states and 73532 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:42,751 INFO L93 Difference]: Finished difference Result 21558 states and 76202 transitions. [2021-08-21 12:05:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:05:42,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:42,819 INFO L225 Difference]: With dead ends: 21558 [2021-08-21 12:05:42,819 INFO L226 Difference]: Without dead ends: 21558 [2021-08-21 12:05:42,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:05:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21558 states. [2021-08-21 12:05:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21558 to 20275. [2021-08-21 12:05:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20275 states, 20274 states have (on average 3.600473512873631) internal successors, (72996), 20274 states have internal predecessors, (72996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20275 states to 20275 states and 72996 transitions. [2021-08-21 12:05:43,326 INFO L78 Accepts]: Start accepts. Automaton has 20275 states and 72996 transitions. Word has length 22 [2021-08-21 12:05:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:43,326 INFO L470 AbstractCegarLoop]: Abstraction has 20275 states and 72996 transitions. [2021-08-21 12:05:43,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 20275 states and 72996 transitions. [2021-08-21 12:05:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:43,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:43,334 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:43,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:43,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:43,549 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash 632803620, now seen corresponding path program 135 times [2021-08-21 12:05:43,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:43,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903109225] [2021-08-21 12:05:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:43,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:43,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:43,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903109225] [2021-08-21 12:05:43,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903109225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:43,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922002433] [2021-08-21 12:05:43,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:43,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:43,712 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:43,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:05:44,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:05:44,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:44,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922002433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:44,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:44,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:44,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514623549] [2021-08-21 12:05:44,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:44,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:44,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:44,757 INFO L87 Difference]: Start difference. First operand 20275 states and 72996 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:45,039 INFO L93 Difference]: Finished difference Result 20612 states and 73456 transitions. [2021-08-21 12:05:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:05:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:45,247 INFO L225 Difference]: With dead ends: 20612 [2021-08-21 12:05:45,247 INFO L226 Difference]: Without dead ends: 20608 [2021-08-21 12:05:45,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:05:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20608 states. [2021-08-21 12:05:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20608 to 18758. [2021-08-21 12:05:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18758 states, 18757 states have (on average 3.5879405022125073) internal successors, (67299), 18757 states have internal predecessors, (67299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18758 states to 18758 states and 67299 transitions. [2021-08-21 12:05:45,634 INFO L78 Accepts]: Start accepts. Automaton has 18758 states and 67299 transitions. Word has length 22 [2021-08-21 12:05:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:45,634 INFO L470 AbstractCegarLoop]: Abstraction has 18758 states and 67299 transitions. [2021-08-21 12:05:45,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 18758 states and 67299 transitions. [2021-08-21 12:05:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:45,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:45,642 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:45,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:45,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 12:05:45,856 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:45,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1224068236, now seen corresponding path program 136 times [2021-08-21 12:05:45,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:45,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677312464] [2021-08-21 12:05:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:45,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:45,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:45,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677312464] [2021-08-21 12:05:45,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677312464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:45,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404914626] [2021-08-21 12:05:45,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:45,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:45,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:45,938 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:45,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:05:46,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:47,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404914626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:47,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:47,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:47,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598499941] [2021-08-21 12:05:47,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:47,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:47,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:47,050 INFO L87 Difference]: Start difference. First operand 18758 states and 67299 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:47,208 INFO L93 Difference]: Finished difference Result 19253 states and 67905 transitions. [2021-08-21 12:05:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:05:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:47,268 INFO L225 Difference]: With dead ends: 19253 [2021-08-21 12:05:47,268 INFO L226 Difference]: Without dead ends: 19253 [2021-08-21 12:05:47,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:05:47,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-08-21 12:05:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 18728. [2021-08-21 12:05:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18728 states, 18727 states have (on average 3.5730763069365086) internal successors, (66913), 18727 states have internal predecessors, (66913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18728 states to 18728 states and 66913 transitions. [2021-08-21 12:05:47,743 INFO L78 Accepts]: Start accepts. Automaton has 18728 states and 66913 transitions. Word has length 22 [2021-08-21 12:05:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:47,743 INFO L470 AbstractCegarLoop]: Abstraction has 18728 states and 66913 transitions. [2021-08-21 12:05:47,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 18728 states and 66913 transitions. [2021-08-21 12:05:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:47,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:47,750 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:47,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:47,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 12:05:47,968 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash 486545072, now seen corresponding path program 137 times [2021-08-21 12:05:47,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:47,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219851308] [2021-08-21 12:05:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:47,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:48,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:48,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219851308] [2021-08-21 12:05:48,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219851308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:48,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212787428] [2021-08-21 12:05:48,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:48,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:48,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:48,061 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:48,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:05:48,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:05:48,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:48,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:48,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212787428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:48,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:48,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:05:48,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729465668] [2021-08-21 12:05:48,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:05:48,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:05:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:05:48,913 INFO L87 Difference]: Start difference. First operand 18728 states and 66913 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:49,155 INFO L93 Difference]: Finished difference Result 19033 states and 66955 transitions. [2021-08-21 12:05:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:05:49,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:49,203 INFO L225 Difference]: With dead ends: 19033 [2021-08-21 12:05:49,203 INFO L226 Difference]: Without dead ends: 19033 [2021-08-21 12:05:49,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:05:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19033 states. [2021-08-21 12:05:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19033 to 18118. [2021-08-21 12:05:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18118 states, 18117 states have (on average 3.5738808853562953) internal successors, (64748), 18117 states have internal predecessors, (64748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18118 states to 18118 states and 64748 transitions. [2021-08-21 12:05:49,606 INFO L78 Accepts]: Start accepts. Automaton has 18118 states and 64748 transitions. Word has length 22 [2021-08-21 12:05:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:49,606 INFO L470 AbstractCegarLoop]: Abstraction has 18118 states and 64748 transitions. [2021-08-21 12:05:49,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 18118 states and 64748 transitions. [2021-08-21 12:05:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:49,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:49,613 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:49,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 12:05:49,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:49,820 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:49,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1975950068, now seen corresponding path program 138 times [2021-08-21 12:05:49,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:49,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036378562] [2021-08-21 12:05:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:49,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:49,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:49,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036378562] [2021-08-21 12:05:49,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036378562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:49,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086057507] [2021-08-21 12:05:49,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:49,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:49,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:49,894 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:49,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 12:05:51,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:05:51,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:51,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:51,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086057507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:51,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:51,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:05:51,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653838404] [2021-08-21 12:05:51,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:05:51,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:05:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:05:51,143 INFO L87 Difference]: Start difference. First operand 18118 states and 64748 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:51,311 INFO L93 Difference]: Finished difference Result 19213 states and 67361 transitions. [2021-08-21 12:05:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:05:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:51,363 INFO L225 Difference]: With dead ends: 19213 [2021-08-21 12:05:51,363 INFO L226 Difference]: Without dead ends: 19213 [2021-08-21 12:05:51,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19213 states. [2021-08-21 12:05:51,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19213 to 18166. [2021-08-21 12:05:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18166 states, 18165 states have (on average 3.565923479218277) internal successors, (64775), 18165 states have internal predecessors, (64775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18166 states to 18166 states and 64775 transitions. [2021-08-21 12:05:51,938 INFO L78 Accepts]: Start accepts. Automaton has 18166 states and 64775 transitions. Word has length 22 [2021-08-21 12:05:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:51,938 INFO L470 AbstractCegarLoop]: Abstraction has 18166 states and 64775 transitions. [2021-08-21 12:05:51,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 18166 states and 64775 transitions. [2021-08-21 12:05:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:51,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:51,947 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:51,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:52,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:52,169 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:52,169 INFO L82 PathProgramCache]: Analyzing trace with hash 902864688, now seen corresponding path program 139 times [2021-08-21 12:05:52,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:52,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888607663] [2021-08-21 12:05:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:52,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:52,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:52,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888607663] [2021-08-21 12:05:52,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888607663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:52,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84267895] [2021-08-21 12:05:52,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:52,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:52,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:52,265 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:52,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 12:05:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:53,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:53,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84267895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:53,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:53,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:05:53,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803496134] [2021-08-21 12:05:53,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:05:53,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:05:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:05:53,374 INFO L87 Difference]: Start difference. First operand 18166 states and 64775 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:53,643 INFO L93 Difference]: Finished difference Result 24240 states and 85821 transitions. [2021-08-21 12:05:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:05:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:53,704 INFO L225 Difference]: With dead ends: 24240 [2021-08-21 12:05:53,704 INFO L226 Difference]: Without dead ends: 24240 [2021-08-21 12:05:53,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:05:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24240 states. [2021-08-21 12:05:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24240 to 19393. [2021-08-21 12:05:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19393 states, 19392 states have (on average 3.5691006600660065) internal successors, (69212), 19392 states have internal predecessors, (69212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19393 states to 19393 states and 69212 transitions. [2021-08-21 12:05:54,141 INFO L78 Accepts]: Start accepts. Automaton has 19393 states and 69212 transitions. Word has length 22 [2021-08-21 12:05:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:54,141 INFO L470 AbstractCegarLoop]: Abstraction has 19393 states and 69212 transitions. [2021-08-21 12:05:54,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 19393 states and 69212 transitions. [2021-08-21 12:05:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:54,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:54,148 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:54,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:54,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:54,365 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1996956276, now seen corresponding path program 140 times [2021-08-21 12:05:54,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:54,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203706446] [2021-08-21 12:05:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:54,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:54,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:54,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203706446] [2021-08-21 12:05:54,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203706446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:54,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760681171] [2021-08-21 12:05:54,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:54,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:54,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:54,442 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 12:05:55,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:55,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:55,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:55,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:55,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760681171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:55,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:55,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:05:55,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594811101] [2021-08-21 12:05:55,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:05:55,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:05:55,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:05:55,600 INFO L87 Difference]: Start difference. First operand 19393 states and 69212 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:55,794 INFO L93 Difference]: Finished difference Result 21468 states and 75693 transitions. [2021-08-21 12:05:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:55,844 INFO L225 Difference]: With dead ends: 21468 [2021-08-21 12:05:55,844 INFO L226 Difference]: Without dead ends: 21468 [2021-08-21 12:05:55,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:05:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21468 states. [2021-08-21 12:05:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21468 to 20238. [2021-08-21 12:05:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20238 states, 20237 states have (on average 3.5724168602065522) internal successors, (72295), 20237 states have internal predecessors, (72295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20238 states to 20238 states and 72295 transitions. [2021-08-21 12:05:56,301 INFO L78 Accepts]: Start accepts. Automaton has 20238 states and 72295 transitions. Word has length 22 [2021-08-21 12:05:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:56,301 INFO L470 AbstractCegarLoop]: Abstraction has 20238 states and 72295 transitions. [2021-08-21 12:05:56,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand 20238 states and 72295 transitions. [2021-08-21 12:05:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:56,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:56,309 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:56,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:56,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:56,526 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:56,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1554057136, now seen corresponding path program 141 times [2021-08-21 12:05:56,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:56,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534157102] [2021-08-21 12:05:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:56,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:56,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:56,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534157102] [2021-08-21 12:05:56,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534157102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:56,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669788142] [2021-08-21 12:05:56,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:56,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:56,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:56,626 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:56,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 12:05:57,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:05:57,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:57,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669788142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:57,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:57,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:05:57,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340598194] [2021-08-21 12:05:57,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:05:57,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:05:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:05:57,722 INFO L87 Difference]: Start difference. First operand 20238 states and 72295 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:58,142 INFO L93 Difference]: Finished difference Result 21341 states and 75134 transitions. [2021-08-21 12:05:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:05:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:05:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:58,192 INFO L225 Difference]: With dead ends: 21341 [2021-08-21 12:05:58,192 INFO L226 Difference]: Without dead ends: 21341 [2021-08-21 12:05:58,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:05:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21341 states. [2021-08-21 12:05:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21341 to 20408. [2021-08-21 12:05:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20408 states, 20407 states have (on average 3.5723526240995738) internal successors, (72901), 20407 states have internal predecessors, (72901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20408 states to 20408 states and 72901 transitions. [2021-08-21 12:05:58,607 INFO L78 Accepts]: Start accepts. Automaton has 20408 states and 72901 transitions. Word has length 22 [2021-08-21 12:05:58,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:58,607 INFO L470 AbstractCegarLoop]: Abstraction has 20408 states and 72901 transitions. [2021-08-21 12:05:58,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 20408 states and 72901 transitions. [2021-08-21 12:05:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:05:58,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:58,616 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:58,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:58,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 12:05:58,835 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:58,835 INFO L82 PathProgramCache]: Analyzing trace with hash 709085684, now seen corresponding path program 142 times [2021-08-21 12:05:58,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:58,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871608692] [2021-08-21 12:05:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:58,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:58,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:58,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871608692] [2021-08-21 12:05:58,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871608692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:58,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948350395] [2021-08-21 12:05:58,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:58,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:58,933 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:05:58,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 12:06:00,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:00,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:00,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948350395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:00,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:00,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:00,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774964666] [2021-08-21 12:06:00,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:00,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:00,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:00,182 INFO L87 Difference]: Start difference. First operand 20408 states and 72901 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:00,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:00,582 INFO L93 Difference]: Finished difference Result 22052 states and 77256 transitions. [2021-08-21 12:06:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:06:00,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:00,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:00,633 INFO L225 Difference]: With dead ends: 22052 [2021-08-21 12:06:00,633 INFO L226 Difference]: Without dead ends: 22052 [2021-08-21 12:06:00,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:06:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22052 states. [2021-08-21 12:06:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22052 to 21220. [2021-08-21 12:06:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21220 states, 21219 states have (on average 3.5682642914369196) internal successors, (75715), 21219 states have internal predecessors, (75715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21220 states to 21220 states and 75715 transitions. [2021-08-21 12:06:01,195 INFO L78 Accepts]: Start accepts. Automaton has 21220 states and 75715 transitions. Word has length 22 [2021-08-21 12:06:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:01,195 INFO L470 AbstractCegarLoop]: Abstraction has 21220 states and 75715 transitions. [2021-08-21 12:06:01,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 21220 states and 75715 transitions. [2021-08-21 12:06:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:01,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:01,203 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:01,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:01,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 12:06:01,416 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:01,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:01,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1473145040, now seen corresponding path program 143 times [2021-08-21 12:06:01,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:01,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900055205] [2021-08-21 12:06:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:01,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:06:01,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:01,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900055205] [2021-08-21 12:06:01,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900055205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:01,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651269290] [2021-08-21 12:06:01,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:01,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:01,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:01,498 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:01,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 12:06:02,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:06:02,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:02,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:02,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:06:02,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651269290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:02,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:02,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:06:02,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67887604] [2021-08-21 12:06:02,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:06:02,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:06:02,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:06:02,422 INFO L87 Difference]: Start difference. First operand 21220 states and 75715 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:02,705 INFO L93 Difference]: Finished difference Result 25865 states and 91963 transitions. [2021-08-21 12:06:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:06:02,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 22 [2021-08-21 12:06:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:02,775 INFO L225 Difference]: With dead ends: 25865 [2021-08-21 12:06:02,775 INFO L226 Difference]: Without dead ends: 25861 [2021-08-21 12:06:02,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:06:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25861 states. [2021-08-21 12:06:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25861 to 24108. [2021-08-21 12:06:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24108 states, 24107 states have (on average 3.577052308458124) internal successors, (86232), 24107 states have internal predecessors, (86232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24108 states to 24108 states and 86232 transitions. [2021-08-21 12:06:03,449 INFO L78 Accepts]: Start accepts. Automaton has 24108 states and 86232 transitions. Word has length 22 [2021-08-21 12:06:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:03,449 INFO L470 AbstractCegarLoop]: Abstraction has 24108 states and 86232 transitions. [2021-08-21 12:06:03,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 24108 states and 86232 transitions. [2021-08-21 12:06:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:03,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:03,457 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:03,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:03,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 12:06:03,673 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1421125456, now seen corresponding path program 144 times [2021-08-21 12:06:03,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:03,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192420871] [2021-08-21 12:06:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:03,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:03,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:03,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192420871] [2021-08-21 12:06:03,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192420871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:03,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201963612] [2021-08-21 12:06:03,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:03,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:03,752 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:03,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 12:06:04,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:06:04,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:06:05,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201963612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:05,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:05,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:06:05,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860891724] [2021-08-21 12:06:05,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:06:05,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:06:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:06:05,031 INFO L87 Difference]: Start difference. First operand 24108 states and 86232 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:05,387 INFO L93 Difference]: Finished difference Result 27586 states and 97099 transitions. [2021-08-21 12:06:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:06:05,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:05,464 INFO L225 Difference]: With dead ends: 27586 [2021-08-21 12:06:05,464 INFO L226 Difference]: Without dead ends: 27586 [2021-08-21 12:06:05,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27586 states. [2021-08-21 12:06:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27586 to 26628. [2021-08-21 12:06:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26628 states, 26627 states have (on average 3.5738536072407707) internal successors, (95161), 26627 states have internal predecessors, (95161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26628 states to 26628 states and 95161 transitions. [2021-08-21 12:06:06,129 INFO L78 Accepts]: Start accepts. Automaton has 26628 states and 95161 transitions. Word has length 22 [2021-08-21 12:06:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:06,129 INFO L470 AbstractCegarLoop]: Abstraction has 26628 states and 95161 transitions. [2021-08-21 12:06:06,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 26628 states and 95161 transitions. [2021-08-21 12:06:06,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:06,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:06,139 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:06,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:06,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:06,357 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1864024596, now seen corresponding path program 145 times [2021-08-21 12:06:06,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:06,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994902563] [2021-08-21 12:06:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:06,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:06,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:06,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994902563] [2021-08-21 12:06:06,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994902563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:06,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168731441] [2021-08-21 12:06:06,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:06,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:06,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:06,433 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:06,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 12:06:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:07,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:07,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168731441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:07,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:07,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:06:07,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618446183] [2021-08-21 12:06:07,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:07,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:07,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:07,654 INFO L87 Difference]: Start difference. First operand 26628 states and 95161 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:07,922 INFO L93 Difference]: Finished difference Result 29739 states and 104277 transitions. [2021-08-21 12:06:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:06:07,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:08,010 INFO L225 Difference]: With dead ends: 29739 [2021-08-21 12:06:08,010 INFO L226 Difference]: Without dead ends: 29739 [2021-08-21 12:06:08,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:06:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29739 states. [2021-08-21 12:06:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29739 to 25750. [2021-08-21 12:06:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25750 states, 25749 states have (on average 3.569109479979805) internal successors, (91901), 25749 states have internal predecessors, (91901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25750 states to 25750 states and 91901 transitions. [2021-08-21 12:06:08,778 INFO L78 Accepts]: Start accepts. Automaton has 25750 states and 91901 transitions. Word has length 22 [2021-08-21 12:06:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:08,778 INFO L470 AbstractCegarLoop]: Abstraction has 25750 states and 91901 transitions. [2021-08-21 12:06:08,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 25750 states and 91901 transitions. [2021-08-21 12:06:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:08,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:08,787 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:08,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:09,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:09,005 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash -769933008, now seen corresponding path program 146 times [2021-08-21 12:06:09,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:09,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104826031] [2021-08-21 12:06:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:09,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:09,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:09,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104826031] [2021-08-21 12:06:09,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104826031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:09,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468449049] [2021-08-21 12:06:09,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:09,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:09,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:09,091 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:09,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 12:06:10,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:10,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:10,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468449049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:10,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:10,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:06:10,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684890411] [2021-08-21 12:06:10,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:10,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:10,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:10,384 INFO L87 Difference]: Start difference. First operand 25750 states and 91901 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:10,684 INFO L93 Difference]: Finished difference Result 29235 states and 102840 transitions. [2021-08-21 12:06:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:06:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:10,758 INFO L225 Difference]: With dead ends: 29235 [2021-08-21 12:06:10,758 INFO L226 Difference]: Without dead ends: 29235 [2021-08-21 12:06:10,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:06:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29235 states. [2021-08-21 12:06:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29235 to 28361. [2021-08-21 12:06:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28361 states, 28360 states have (on average 3.5681241184767276) internal successors, (101192), 28360 states have internal predecessors, (101192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28361 states to 28361 states and 101192 transitions. [2021-08-21 12:06:11,507 INFO L78 Accepts]: Start accepts. Automaton has 28361 states and 101192 transitions. Word has length 22 [2021-08-21 12:06:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:11,507 INFO L470 AbstractCegarLoop]: Abstraction has 28361 states and 101192 transitions. [2021-08-21 12:06:11,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 28361 states and 101192 transitions. [2021-08-21 12:06:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:11,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:11,517 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:11,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:11,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 12:06:11,736 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1585971248, now seen corresponding path program 147 times [2021-08-21 12:06:11,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:11,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363430033] [2021-08-21 12:06:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:11,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:11,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:11,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363430033] [2021-08-21 12:06:11,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363430033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:11,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644561327] [2021-08-21 12:06:11,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:11,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:11,998 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:11,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 12:06:13,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:06:13,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:13,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:13,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644561327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:13,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:13,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:06:13,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595170215] [2021-08-21 12:06:13,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:13,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:13,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:13,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:13,241 INFO L87 Difference]: Start difference. First operand 28361 states and 101192 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:13,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:13,519 INFO L93 Difference]: Finished difference Result 31605 states and 110626 transitions. [2021-08-21 12:06:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:06:13,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:13,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:13,602 INFO L225 Difference]: With dead ends: 31605 [2021-08-21 12:06:13,602 INFO L226 Difference]: Without dead ends: 31605 [2021-08-21 12:06:13,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:06:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31605 states. [2021-08-21 12:06:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31605 to 23380. [2021-08-21 12:06:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23380 states, 23379 states have (on average 3.5418965738483252) internal successors, (82806), 23379 states have internal predecessors, (82806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23380 states to 23380 states and 82806 transitions. [2021-08-21 12:06:14,247 INFO L78 Accepts]: Start accepts. Automaton has 23380 states and 82806 transitions. Word has length 22 [2021-08-21 12:06:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:14,247 INFO L470 AbstractCegarLoop]: Abstraction has 23380 states and 82806 transitions. [2021-08-21 12:06:14,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23380 states and 82806 transitions. [2021-08-21 12:06:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:14,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:14,256 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:14,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:14,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:14,475 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1614904460, now seen corresponding path program 148 times [2021-08-21 12:06:14,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:14,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909678864] [2021-08-21 12:06:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:14,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:14,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:14,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909678864] [2021-08-21 12:06:14,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909678864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:14,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958692091] [2021-08-21 12:06:14,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:14,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:14,565 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:14,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 12:06:15,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:15,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:15,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:15,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:15,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958692091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:15,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:15,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:06:15,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447293862] [2021-08-21 12:06:15,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:15,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:15,882 INFO L87 Difference]: Start difference. First operand 23380 states and 82806 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:16,279 INFO L93 Difference]: Finished difference Result 27007 states and 94318 transitions. [2021-08-21 12:06:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:06:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:16,361 INFO L225 Difference]: With dead ends: 27007 [2021-08-21 12:06:16,361 INFO L226 Difference]: Without dead ends: 27007 [2021-08-21 12:06:16,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:06:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27007 states. [2021-08-21 12:06:16,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27007 to 23526. [2021-08-21 12:06:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23526 states, 23525 states have (on average 3.5427842720510094) internal successors, (83344), 23525 states have internal predecessors, (83344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23526 states to 23526 states and 83344 transitions. [2021-08-21 12:06:17,065 INFO L78 Accepts]: Start accepts. Automaton has 23526 states and 83344 transitions. Word has length 22 [2021-08-21 12:06:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:17,065 INFO L470 AbstractCegarLoop]: Abstraction has 23526 states and 83344 transitions. [2021-08-21 12:06:17,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 23526 states and 83344 transitions. [2021-08-21 12:06:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:17,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:17,075 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:17,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:17,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:17,294 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:17,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:17,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2057803600, now seen corresponding path program 149 times [2021-08-21 12:06:17,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:17,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619713155] [2021-08-21 12:06:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:17,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:17,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:17,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619713155] [2021-08-21 12:06:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619713155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:17,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020215988] [2021-08-21 12:06:17,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:17,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:17,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:17,391 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:17,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 12:06:18,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:06:18,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:18,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020215988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:18,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:18,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:06:18,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431155089] [2021-08-21 12:06:18,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:18,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:18,625 INFO L87 Difference]: Start difference. First operand 23526 states and 83344 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:18,975 INFO L93 Difference]: Finished difference Result 25764 states and 89832 transitions. [2021-08-21 12:06:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:06:18,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:18,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:19,036 INFO L225 Difference]: With dead ends: 25764 [2021-08-21 12:06:19,036 INFO L226 Difference]: Without dead ends: 25764 [2021-08-21 12:06:19,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:06:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25764 states. [2021-08-21 12:06:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25764 to 24974. [2021-08-21 12:06:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24974 states, 24973 states have (on average 3.5417050414447604) internal successors, (88447), 24973 states have internal predecessors, (88447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24974 states to 24974 states and 88447 transitions. [2021-08-21 12:06:19,691 INFO L78 Accepts]: Start accepts. Automaton has 24974 states and 88447 transitions. Word has length 22 [2021-08-21 12:06:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:19,691 INFO L470 AbstractCegarLoop]: Abstraction has 24974 states and 88447 transitions. [2021-08-21 12:06:19,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 24974 states and 88447 transitions. [2021-08-21 12:06:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:19,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:19,700 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:19,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:19,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:19,920 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1161660012, now seen corresponding path program 150 times [2021-08-21 12:06:19,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:19,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739778455] [2021-08-21 12:06:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:19,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:20,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:20,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739778455] [2021-08-21 12:06:20,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739778455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:20,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332378758] [2021-08-21 12:06:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:20,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:20,004 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:20,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 12:06:21,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:06:21,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:21,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332378758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:21,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:21,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:21,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114165263] [2021-08-21 12:06:21,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:21,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:21,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:21,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:21,335 INFO L87 Difference]: Start difference. First operand 24974 states and 88447 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:21,665 INFO L93 Difference]: Finished difference Result 26571 states and 92565 transitions. [2021-08-21 12:06:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:06:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:21,747 INFO L225 Difference]: With dead ends: 26571 [2021-08-21 12:06:21,747 INFO L226 Difference]: Without dead ends: 26571 [2021-08-21 12:06:21,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:06:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26571 states. [2021-08-21 12:06:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26571 to 18946. [2021-08-21 12:06:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18946 states, 18945 states have (on average 3.5239904988123514) internal successors, (66762), 18945 states have internal predecessors, (66762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18946 states to 18946 states and 66762 transitions. [2021-08-21 12:06:22,464 INFO L78 Accepts]: Start accepts. Automaton has 18946 states and 66762 transitions. Word has length 22 [2021-08-21 12:06:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:22,464 INFO L470 AbstractCegarLoop]: Abstraction has 18946 states and 66762 transitions. [2021-08-21 12:06:22,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 18946 states and 66762 transitions. [2021-08-21 12:06:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:22,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:22,474 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:22,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:22,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:22,687 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:22,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2039215696, now seen corresponding path program 151 times [2021-08-21 12:06:22,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:22,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259116111] [2021-08-21 12:06:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:22,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:22,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:22,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259116111] [2021-08-21 12:06:22,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259116111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:22,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608403444] [2021-08-21 12:06:22,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:22,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:22,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:22,763 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:22,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 12:06:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:23,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:24,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608403444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:24,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:24,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:24,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108211393] [2021-08-21 12:06:24,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:24,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:24,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:24,049 INFO L87 Difference]: Start difference. First operand 18946 states and 66762 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:24,265 INFO L93 Difference]: Finished difference Result 22849 states and 79385 transitions. [2021-08-21 12:06:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:06:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:24,317 INFO L225 Difference]: With dead ends: 22849 [2021-08-21 12:06:24,317 INFO L226 Difference]: Without dead ends: 22849 [2021-08-21 12:06:24,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:06:24,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22849 states. [2021-08-21 12:06:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22849 to 18538. [2021-08-21 12:06:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18538 states, 18537 states have (on average 3.5261369153584723) internal successors, (65364), 18537 states have internal predecessors, (65364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18538 states to 18538 states and 65364 transitions. [2021-08-21 12:06:24,756 INFO L78 Accepts]: Start accepts. Automaton has 18538 states and 65364 transitions. Word has length 22 [2021-08-21 12:06:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:24,756 INFO L470 AbstractCegarLoop]: Abstraction has 18538 states and 65364 transitions. [2021-08-21 12:06:24,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 18538 states and 65364 transitions. [2021-08-21 12:06:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:24,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:24,763 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:24,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:24,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:24,977 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1812852460, now seen corresponding path program 152 times [2021-08-21 12:06:24,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:24,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499542317] [2021-08-21 12:06:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:24,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:25,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:25,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499542317] [2021-08-21 12:06:25,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499542317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:25,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573128624] [2021-08-21 12:06:25,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:25,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:25,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:25,067 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:25,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 12:06:26,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:26,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:26,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573128624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:26,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:26,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:26,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506154025] [2021-08-21 12:06:26,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:26,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:26,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:26,314 INFO L87 Difference]: Start difference. First operand 18538 states and 65364 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:26,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:26,610 INFO L93 Difference]: Finished difference Result 19998 states and 69265 transitions. [2021-08-21 12:06:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:06:26,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:26,653 INFO L225 Difference]: With dead ends: 19998 [2021-08-21 12:06:26,653 INFO L226 Difference]: Without dead ends: 19998 [2021-08-21 12:06:26,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:06:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19998 states. [2021-08-21 12:06:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19998 to 18073. [2021-08-21 12:06:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18073 states, 18072 states have (on average 3.5291611332447985) internal successors, (63779), 18072 states have internal predecessors, (63779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18073 states to 18073 states and 63779 transitions. [2021-08-21 12:06:27,132 INFO L78 Accepts]: Start accepts. Automaton has 18073 states and 63779 transitions. Word has length 22 [2021-08-21 12:06:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:27,132 INFO L470 AbstractCegarLoop]: Abstraction has 18073 states and 63779 transitions. [2021-08-21 12:06:27,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 18073 states and 63779 transitions. [2021-08-21 12:06:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:27,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:27,139 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:27,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:27,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 12:06:27,358 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:27,358 INFO L82 PathProgramCache]: Analyzing trace with hash 967881008, now seen corresponding path program 153 times [2021-08-21 12:06:27,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:27,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992141787] [2021-08-21 12:06:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:27,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:27,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:27,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992141787] [2021-08-21 12:06:27,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992141787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:27,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518142299] [2021-08-21 12:06:27,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:27,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:27,453 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:27,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 12:06:28,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:06:28,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:28,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:28,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:28,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518142299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:28,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:28,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:28,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081063179] [2021-08-21 12:06:28,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:28,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:28,772 INFO L87 Difference]: Start difference. First operand 18073 states and 63779 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:29,160 INFO L93 Difference]: Finished difference Result 19320 states and 66635 transitions. [2021-08-21 12:06:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:06:29,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:29,203 INFO L225 Difference]: With dead ends: 19320 [2021-08-21 12:06:29,203 INFO L226 Difference]: Without dead ends: 19320 [2021-08-21 12:06:29,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:06:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19320 states. [2021-08-21 12:06:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19320 to 17988. [2021-08-21 12:06:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17988 states, 17987 states have (on average 3.5308834158003) internal successors, (63510), 17987 states have internal predecessors, (63510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17988 states to 17988 states and 63510 transitions. [2021-08-21 12:06:29,667 INFO L78 Accepts]: Start accepts. Automaton has 17988 states and 63510 transitions. Word has length 22 [2021-08-21 12:06:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:29,667 INFO L470 AbstractCegarLoop]: Abstraction has 17988 states and 63510 transitions. [2021-08-21 12:06:29,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17988 states and 63510 transitions. [2021-08-21 12:06:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:29,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:29,674 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:29,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:29,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:29,893 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:29,893 INFO L82 PathProgramCache]: Analyzing trace with hash 622852516, now seen corresponding path program 154 times [2021-08-21 12:06:29,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:29,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899097283] [2021-08-21 12:06:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:29,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:29,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:29,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899097283] [2021-08-21 12:06:29,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899097283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:29,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102904057] [2021-08-21 12:06:29,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:29,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:29,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:29,975 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:29,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 12:06:31,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:31,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:31,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102904057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:31,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:31,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:06:31,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506283351] [2021-08-21 12:06:31,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:31,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:31,316 INFO L87 Difference]: Start difference. First operand 17988 states and 63510 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:31,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:31,543 INFO L93 Difference]: Finished difference Result 18308 states and 63939 transitions. [2021-08-21 12:06:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:06:31,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:31,582 INFO L225 Difference]: With dead ends: 18308 [2021-08-21 12:06:31,582 INFO L226 Difference]: Without dead ends: 18304 [2021-08-21 12:06:31,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:06:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-08-21 12:06:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 17528. [2021-08-21 12:06:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17528 states, 17527 states have (on average 3.5298682033434132) internal successors, (61868), 17527 states have internal predecessors, (61868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17528 states to 17528 states and 61868 transitions. [2021-08-21 12:06:32,035 INFO L78 Accepts]: Start accepts. Automaton has 17528 states and 61868 transitions. Word has length 22 [2021-08-21 12:06:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:32,035 INFO L470 AbstractCegarLoop]: Abstraction has 17528 states and 61868 transitions. [2021-08-21 12:06:32,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 17528 states and 61868 transitions. [2021-08-21 12:06:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:32,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:32,042 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:32,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:32,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 12:06:32,261 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1234019340, now seen corresponding path program 155 times [2021-08-21 12:06:32,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:32,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951363273] [2021-08-21 12:06:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:32,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:32,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:32,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951363273] [2021-08-21 12:06:32,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951363273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:32,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652016865] [2021-08-21 12:06:32,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:32,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:32,342 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:32,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 12:06:33,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:06:33,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:33,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:33,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:33,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652016865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:33,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:33,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:06:33,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206587267] [2021-08-21 12:06:33,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:33,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:33,656 INFO L87 Difference]: Start difference. First operand 17528 states and 61868 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:33,796 INFO L93 Difference]: Finished difference Result 17977 states and 62614 transitions. [2021-08-21 12:06:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:06:33,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:33,837 INFO L225 Difference]: With dead ends: 17977 [2021-08-21 12:06:33,838 INFO L226 Difference]: Without dead ends: 17977 [2021-08-21 12:06:33,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:06:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17977 states. [2021-08-21 12:06:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17977 to 17545. [2021-08-21 12:06:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17545 states, 17544 states have (on average 3.528043775649795) internal successors, (61896), 17544 states have internal predecessors, (61896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17545 states to 17545 states and 61896 transitions. [2021-08-21 12:06:34,298 INFO L78 Accepts]: Start accepts. Automaton has 17545 states and 61896 transitions. Word has length 22 [2021-08-21 12:06:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:34,298 INFO L470 AbstractCegarLoop]: Abstraction has 17545 states and 61896 transitions. [2021-08-21 12:06:34,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 17545 states and 61896 transitions. [2021-08-21 12:06:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:34,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:34,305 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:34,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-21 12:06:34,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 12:06:34,526 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash 476593968, now seen corresponding path program 156 times [2021-08-21 12:06:34,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:34,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598694336] [2021-08-21 12:06:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:34,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:34,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:34,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598694336] [2021-08-21 12:06:34,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598694336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:34,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347062093] [2021-08-21 12:06:34,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:34,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:34,610 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:34,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 12:06:35,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:06:35,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:35,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:35,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:35,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347062093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:35,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:35,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:06:35,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594041470] [2021-08-21 12:06:35,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:35,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:35,886 INFO L87 Difference]: Start difference. First operand 17545 states and 61896 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:36,046 INFO L93 Difference]: Finished difference Result 18028 states and 62675 transitions. [2021-08-21 12:06:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:06:36,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:36,086 INFO L225 Difference]: With dead ends: 18028 [2021-08-21 12:06:36,086 INFO L226 Difference]: Without dead ends: 18028 [2021-08-21 12:06:36,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:06:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2021-08-21 12:06:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 17514. [2021-08-21 12:06:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17514 states, 17513 states have (on average 3.5241820362016787) internal successors, (61719), 17513 states have internal predecessors, (61719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17514 states to 17514 states and 61719 transitions. [2021-08-21 12:06:36,497 INFO L78 Accepts]: Start accepts. Automaton has 17514 states and 61719 transitions. Word has length 22 [2021-08-21 12:06:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:36,497 INFO L470 AbstractCegarLoop]: Abstraction has 17514 states and 61719 transitions. [2021-08-21 12:06:36,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 17514 states and 61719 transitions. [2021-08-21 12:06:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:36,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:36,504 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:36,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:36,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-21 12:06:36,719 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1965998964, now seen corresponding path program 157 times [2021-08-21 12:06:36,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:36,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383524753] [2021-08-21 12:06:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:36,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:36,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:36,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383524753] [2021-08-21 12:06:36,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383524753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:36,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290713150] [2021-08-21 12:06:36,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:36,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:36,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:36,804 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:36,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 12:06:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:38,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:38,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:38,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290713150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:38,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:38,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:06:38,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650395072] [2021-08-21 12:06:38,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:38,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:38,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:38,092 INFO L87 Difference]: Start difference. First operand 17514 states and 61719 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:38,271 INFO L93 Difference]: Finished difference Result 26489 states and 92103 transitions. [2021-08-21 12:06:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:38,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:38,338 INFO L225 Difference]: With dead ends: 26489 [2021-08-21 12:06:38,338 INFO L226 Difference]: Without dead ends: 26489 [2021-08-21 12:06:38,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:06:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26489 states. [2021-08-21 12:06:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26489 to 25880. [2021-08-21 12:06:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25880 states, 25879 states have (on average 3.5140461377951233) internal successors, (90940), 25879 states have internal predecessors, (90940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25880 states to 25880 states and 90940 transitions. [2021-08-21 12:06:39,091 INFO L78 Accepts]: Start accepts. Automaton has 25880 states and 90940 transitions. Word has length 22 [2021-08-21 12:06:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:39,091 INFO L470 AbstractCegarLoop]: Abstraction has 25880 states and 90940 transitions. [2021-08-21 12:06:39,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 25880 states and 90940 transitions. [2021-08-21 12:06:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:39,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:39,100 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:39,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:39,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:39,320 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash 892913584, now seen corresponding path program 158 times [2021-08-21 12:06:39,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:39,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919659393] [2021-08-21 12:06:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:39,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:39,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:39,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919659393] [2021-08-21 12:06:39,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919659393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:39,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842407334] [2021-08-21 12:06:39,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:39,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:39,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:39,406 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:39,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 12:06:40,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:40,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842407334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:40,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:40,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:40,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182191278] [2021-08-21 12:06:40,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:40,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:40,876 INFO L87 Difference]: Start difference. First operand 25880 states and 90940 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:41,101 INFO L93 Difference]: Finished difference Result 26812 states and 92943 transitions. [2021-08-21 12:06:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:06:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:41,169 INFO L225 Difference]: With dead ends: 26812 [2021-08-21 12:06:41,169 INFO L226 Difference]: Without dead ends: 26812 [2021-08-21 12:06:41,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:06:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26812 states. [2021-08-21 12:06:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26812 to 25924. [2021-08-21 12:06:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25924 states, 25923 states have (on average 3.5124406897349845) internal successors, (91053), 25923 states have internal predecessors, (91053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25924 states to 25924 states and 91053 transitions. [2021-08-21 12:06:41,813 INFO L78 Accepts]: Start accepts. Automaton has 25924 states and 91053 transitions. Word has length 22 [2021-08-21 12:06:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:41,813 INFO L470 AbstractCegarLoop]: Abstraction has 25924 states and 91053 transitions. [2021-08-21 12:06:41,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 25924 states and 91053 transitions. [2021-08-21 12:06:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:41,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:41,820 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:41,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:42,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:42,039 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1987005172, now seen corresponding path program 159 times [2021-08-21 12:06:42,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:42,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012188717] [2021-08-21 12:06:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:42,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:42,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:42,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012188717] [2021-08-21 12:06:42,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012188717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:42,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397523892] [2021-08-21 12:06:42,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:42,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:42,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:42,132 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:42,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 12:06:43,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:06:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:43,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:43,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:43,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397523892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:43,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:43,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:43,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135067431] [2021-08-21 12:06:43,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:43,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:43,494 INFO L87 Difference]: Start difference. First operand 25924 states and 91053 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:43,819 INFO L93 Difference]: Finished difference Result 28899 states and 100425 transitions. [2021-08-21 12:06:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:06:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:43,887 INFO L225 Difference]: With dead ends: 28899 [2021-08-21 12:06:43,887 INFO L226 Difference]: Without dead ends: 28899 [2021-08-21 12:06:43,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:06:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28899 states. [2021-08-21 12:06:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28899 to 28461. [2021-08-21 12:06:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28461 states, 28460 states have (on average 3.503513703443429) internal successors, (99710), 28460 states have internal predecessors, (99710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28461 states to 28461 states and 99710 transitions. [2021-08-21 12:06:44,591 INFO L78 Accepts]: Start accepts. Automaton has 28461 states and 99710 transitions. Word has length 22 [2021-08-21 12:06:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:44,591 INFO L470 AbstractCegarLoop]: Abstraction has 28461 states and 99710 transitions. [2021-08-21 12:06:44,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 28461 states and 99710 transitions. [2021-08-21 12:06:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:44,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:44,599 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:44,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:44,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:44,819 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1544106032, now seen corresponding path program 160 times [2021-08-21 12:06:44,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:44,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533510048] [2021-08-21 12:06:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:44,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:44,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:44,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533510048] [2021-08-21 12:06:44,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533510048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:44,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921968149] [2021-08-21 12:06:44,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:44,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:44,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:44,911 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:44,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 12:06:46,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:46,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:46,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:46,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921968149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:46,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:46,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:46,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409352928] [2021-08-21 12:06:46,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:46,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:46,181 INFO L87 Difference]: Start difference. First operand 28461 states and 99710 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:46,645 INFO L93 Difference]: Finished difference Result 29845 states and 103526 transitions. [2021-08-21 12:06:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:06:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:46,714 INFO L225 Difference]: With dead ends: 29845 [2021-08-21 12:06:46,714 INFO L226 Difference]: Without dead ends: 29845 [2021-08-21 12:06:46,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:06:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29845 states. [2021-08-21 12:06:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29845 to 29445. [2021-08-21 12:06:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29445 states, 29444 states have (on average 3.4953470995788614) internal successors, (102917), 29444 states have internal predecessors, (102917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29445 states to 29445 states and 102917 transitions. [2021-08-21 12:06:47,403 INFO L78 Accepts]: Start accepts. Automaton has 29445 states and 102917 transitions. Word has length 22 [2021-08-21 12:06:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:47,403 INFO L470 AbstractCegarLoop]: Abstraction has 29445 states and 102917 transitions. [2021-08-21 12:06:47,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 29445 states and 102917 transitions. [2021-08-21 12:06:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:47,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:47,412 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:47,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2021-08-21 12:06:47,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:47,631 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash 699134580, now seen corresponding path program 161 times [2021-08-21 12:06:47,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:47,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166243535] [2021-08-21 12:06:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:47,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:47,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:47,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166243535] [2021-08-21 12:06:47,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166243535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:47,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042476070] [2021-08-21 12:06:47,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:47,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:47,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:47,731 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:47,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 12:06:49,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:06:49,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:49,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:49,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042476070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:49,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:49,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:49,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351150415] [2021-08-21 12:06:49,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:49,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:49,147 INFO L87 Difference]: Start difference. First operand 29445 states and 102917 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:49,660 INFO L93 Difference]: Finished difference Result 30326 states and 104844 transitions. [2021-08-21 12:06:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:06:49,660 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:49,728 INFO L225 Difference]: With dead ends: 30326 [2021-08-21 12:06:49,729 INFO L226 Difference]: Without dead ends: 30326 [2021-08-21 12:06:49,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:06:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30326 states. [2021-08-21 12:06:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30326 to 29748. [2021-08-21 12:06:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29748 states, 29747 states have (on average 3.4920832352842304) internal successors, (103879), 29747 states have internal predecessors, (103879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29748 states to 29748 states and 103879 transitions. [2021-08-21 12:06:50,435 INFO L78 Accepts]: Start accepts. Automaton has 29748 states and 103879 transitions. Word has length 22 [2021-08-21 12:06:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:50,435 INFO L470 AbstractCegarLoop]: Abstraction has 29748 states and 103879 transitions. [2021-08-21 12:06:50,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 29748 states and 103879 transitions. [2021-08-21 12:06:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:50,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:50,444 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:50,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:50,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:50,663 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:50,663 INFO L82 PathProgramCache]: Analyzing trace with hash 274823344, now seen corresponding path program 162 times [2021-08-21 12:06:50,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:50,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860410897] [2021-08-21 12:06:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:50,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:50,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:50,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860410897] [2021-08-21 12:06:50,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860410897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:50,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650218950] [2021-08-21 12:06:50,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:50,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:50,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:50,770 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:50,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 12:06:52,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:06:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:52,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650218950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:52,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:52,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:06:52,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273275814] [2021-08-21 12:06:52,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:06:52,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:52,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:06:52,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:06:52,142 INFO L87 Difference]: Start difference. First operand 29748 states and 103879 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:52,774 INFO L93 Difference]: Finished difference Result 30822 states and 106235 transitions. [2021-08-21 12:06:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:06:52,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:52,870 INFO L225 Difference]: With dead ends: 30822 [2021-08-21 12:06:52,870 INFO L226 Difference]: Without dead ends: 30822 [2021-08-21 12:06:52,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:06:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30822 states. [2021-08-21 12:06:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30822 to 29952. [2021-08-21 12:06:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29952 states, 29951 states have (on average 3.489265800807986) internal successors, (104507), 29951 states have internal predecessors, (104507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29952 states to 29952 states and 104507 transitions. [2021-08-21 12:06:53,614 INFO L78 Accepts]: Start accepts. Automaton has 29952 states and 104507 transitions. Word has length 22 [2021-08-21 12:06:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:53,614 INFO L470 AbstractCegarLoop]: Abstraction has 29952 states and 104507 transitions. [2021-08-21 12:06:53,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 29952 states and 104507 transitions. [2021-08-21 12:06:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:53,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:53,624 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:53,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:53,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:53,843 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2040424588, now seen corresponding path program 163 times [2021-08-21 12:06:53,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:53,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114773835] [2021-08-21 12:06:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:53,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:53,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:53,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114773835] [2021-08-21 12:06:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114773835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:53,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344849724] [2021-08-21 12:06:53,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:53,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:53,914 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:53,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 12:06:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:55,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:06:55,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344849724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:55,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:55,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:06:55,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933606051] [2021-08-21 12:06:55,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:06:55,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:06:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:06:55,305 INFO L87 Difference]: Start difference. First operand 29952 states and 104507 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:55,725 INFO L93 Difference]: Finished difference Result 31445 states and 109140 transitions. [2021-08-21 12:06:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:06:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:55,795 INFO L225 Difference]: With dead ends: 31445 [2021-08-21 12:06:55,795 INFO L226 Difference]: Without dead ends: 31441 [2021-08-21 12:06:55,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:06:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31441 states. [2021-08-21 12:06:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31441 to 28651. [2021-08-21 12:06:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28651 states, 28650 states have (on average 3.4791623036649213) internal successors, (99678), 28650 states have internal predecessors, (99678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28651 states to 28651 states and 99678 transitions. [2021-08-21 12:06:56,448 INFO L78 Accepts]: Start accepts. Automaton has 28651 states and 99678 transitions. Word has length 22 [2021-08-21 12:06:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:56,448 INFO L470 AbstractCegarLoop]: Abstraction has 28651 states and 99678 transitions. [2021-08-21 12:06:56,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 28651 states and 99678 transitions. [2021-08-21 12:06:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:56,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:56,457 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:56,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:56,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 12:06:56,677 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:56,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1337212556, now seen corresponding path program 164 times [2021-08-21 12:06:56,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:56,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002350882] [2021-08-21 12:06:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:56,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:56,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:56,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002350882] [2021-08-21 12:06:56,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002350882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:56,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315650449] [2021-08-21 12:06:56,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:56,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:56,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:56,759 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:56,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 12:06:58,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:58,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:06:58,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:58,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315650449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:58,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:58,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:06:58,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433802805] [2021-08-21 12:06:58,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:06:58,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:58,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:06:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:58,207 INFO L87 Difference]: Start difference. First operand 28651 states and 99678 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:58,538 INFO L93 Difference]: Finished difference Result 35164 states and 120154 transitions. [2021-08-21 12:06:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:06:58,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:06:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:58,627 INFO L225 Difference]: With dead ends: 35164 [2021-08-21 12:06:58,628 INFO L226 Difference]: Without dead ends: 35164 [2021-08-21 12:06:58,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:06:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35164 states. [2021-08-21 12:06:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35164 to 33612. [2021-08-21 12:06:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33612 states, 33611 states have (on average 3.466632947546934) internal successors, (116517), 33611 states have internal predecessors, (116517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:59,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33612 states to 33612 states and 116517 transitions. [2021-08-21 12:06:59,520 INFO L78 Accepts]: Start accepts. Automaton has 33612 states and 116517 transitions. Word has length 22 [2021-08-21 12:06:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:59,520 INFO L470 AbstractCegarLoop]: Abstraction has 33612 states and 116517 transitions. [2021-08-21 12:06:59,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 33612 states and 116517 transitions. [2021-08-21 12:06:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:06:59,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:59,530 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:59,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:59,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 12:06:59,749 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2112783288, now seen corresponding path program 165 times [2021-08-21 12:06:59,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:59,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008219792] [2021-08-21 12:06:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:59,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:59,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:59,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008219792] [2021-08-21 12:06:59,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008219792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:59,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134238685] [2021-08-21 12:06:59,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:59,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:59,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:59,833 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:06:59,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 12:07:01,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:07:01,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:01,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:01,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:01,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134238685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:01,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:01,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:07:01,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885714066] [2021-08-21 12:07:01,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:01,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:01,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:01,295 INFO L87 Difference]: Start difference. First operand 33612 states and 116517 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:01,654 INFO L93 Difference]: Finished difference Result 40631 states and 138420 transitions. [2021-08-21 12:07:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:07:01,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:01,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:02,105 INFO L225 Difference]: With dead ends: 40631 [2021-08-21 12:07:02,106 INFO L226 Difference]: Without dead ends: 40631 [2021-08-21 12:07:02,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:07:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40631 states. [2021-08-21 12:07:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40631 to 29715. [2021-08-21 12:07:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29715 states, 29714 states have (on average 3.459547687958538) internal successors, (102797), 29714 states have internal predecessors, (102797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29715 states to 29715 states and 102797 transitions. [2021-08-21 12:07:02,858 INFO L78 Accepts]: Start accepts. Automaton has 29715 states and 102797 transitions. Word has length 22 [2021-08-21 12:07:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:02,858 INFO L470 AbstractCegarLoop]: Abstraction has 29715 states and 102797 transitions. [2021-08-21 12:07:02,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 29715 states and 102797 transitions. [2021-08-21 12:07:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:02,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:02,868 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:02,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:03,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 12:07:03,088 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:03,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1669884148, now seen corresponding path program 166 times [2021-08-21 12:07:03,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:03,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420568358] [2021-08-21 12:07:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:03,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:03,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:03,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420568358] [2021-08-21 12:07:03,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420568358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:03,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163898050] [2021-08-21 12:07:03,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:03,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:03,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:03,174 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:03,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 12:07:04,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:04,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:04,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163898050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:04,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:04,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:07:04,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844479790] [2021-08-21 12:07:04,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:04,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:04,575 INFO L87 Difference]: Start difference. First operand 29715 states and 102797 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:05,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:05,049 INFO L93 Difference]: Finished difference Result 35158 states and 119935 transitions. [2021-08-21 12:07:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:07:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:05,126 INFO L225 Difference]: With dead ends: 35158 [2021-08-21 12:07:05,126 INFO L226 Difference]: Without dead ends: 35158 [2021-08-21 12:07:05,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:07:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35158 states. [2021-08-21 12:07:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35158 to 33753. [2021-08-21 12:07:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33753 states, 33752 states have (on average 3.4589357667693768) internal successors, (116746), 33752 states have internal predecessors, (116746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33753 states to 33753 states and 116746 transitions. [2021-08-21 12:07:05,899 INFO L78 Accepts]: Start accepts. Automaton has 33753 states and 116746 transitions. Word has length 22 [2021-08-21 12:07:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:05,899 INFO L470 AbstractCegarLoop]: Abstraction has 33753 states and 116746 transitions. [2021-08-21 12:07:05,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 33753 states and 116746 transitions. [2021-08-21 12:07:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:05,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:05,909 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:05,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:06,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 12:07:06,128 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:06,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1688472052, now seen corresponding path program 167 times [2021-08-21 12:07:06,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:06,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620142258] [2021-08-21 12:07:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:06,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:06,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:06,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620142258] [2021-08-21 12:07:06,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620142258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:06,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000620719] [2021-08-21 12:07:06,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:06,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:06,218 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:06,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 12:07:07,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:07:07,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:07,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:07,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000620719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:07,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:07,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:07,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275618716] [2021-08-21 12:07:07,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:07,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:07,734 INFO L87 Difference]: Start difference. First operand 33753 states and 116746 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:08,187 INFO L93 Difference]: Finished difference Result 36557 states and 124534 transitions. [2021-08-21 12:07:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:07:08,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:08,282 INFO L225 Difference]: With dead ends: 36557 [2021-08-21 12:07:08,282 INFO L226 Difference]: Without dead ends: 36557 [2021-08-21 12:07:08,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:07:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36557 states. [2021-08-21 12:07:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36557 to 27161. [2021-08-21 12:07:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27161 states, 27160 states have (on average 3.4494845360824744) internal successors, (93688), 27160 states have internal predecessors, (93688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27161 states to 27161 states and 93688 transitions. [2021-08-21 12:07:08,970 INFO L78 Accepts]: Start accepts. Automaton has 27161 states and 93688 transitions. Word has length 22 [2021-08-21 12:07:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:08,970 INFO L470 AbstractCegarLoop]: Abstraction has 27161 states and 93688 transitions. [2021-08-21 12:07:08,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 27161 states and 93688 transitions. [2021-08-21 12:07:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:08,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:08,979 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:08,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:09,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:09,199 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:09,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:09,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1245572912, now seen corresponding path program 168 times [2021-08-21 12:07:09,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:09,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044049125] [2021-08-21 12:07:09,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:09,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:09,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:09,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044049125] [2021-08-21 12:07:09,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044049125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:09,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701631199] [2021-08-21 12:07:09,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:09,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:09,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:09,290 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:09,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 12:07:10,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:07:10,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:10,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701631199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:10,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:10,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:10,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697907448] [2021-08-21 12:07:10,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:10,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:10,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:10,703 INFO L87 Difference]: Start difference. First operand 27161 states and 93688 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:11,152 INFO L93 Difference]: Finished difference Result 32382 states and 110135 transitions. [2021-08-21 12:07:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:07:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:11,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:11,236 INFO L225 Difference]: With dead ends: 32382 [2021-08-21 12:07:11,236 INFO L226 Difference]: Without dead ends: 32382 [2021-08-21 12:07:11,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:07:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32382 states. [2021-08-21 12:07:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32382 to 25105. [2021-08-21 12:07:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25105 states, 25104 states have (on average 3.4525971956660295) internal successors, (86674), 25104 states have internal predecessors, (86674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25105 states to 25105 states and 86674 transitions. [2021-08-21 12:07:11,901 INFO L78 Accepts]: Start accepts. Automaton has 25105 states and 86674 transitions. Word has length 22 [2021-08-21 12:07:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:11,901 INFO L470 AbstractCegarLoop]: Abstraction has 25105 states and 86674 transitions. [2021-08-21 12:07:11,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 25105 states and 86674 transitions. [2021-08-21 12:07:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:11,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:11,910 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:11,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:12,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:12,129 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 400601460, now seen corresponding path program 169 times [2021-08-21 12:07:12,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:12,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133662427] [2021-08-21 12:07:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:12,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:12,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:12,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133662427] [2021-08-21 12:07:12,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133662427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:12,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954441007] [2021-08-21 12:07:12,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:12,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:12,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:12,226 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:12,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 12:07:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:13,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:13,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:13,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954441007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:13,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:13,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:13,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835982616] [2021-08-21 12:07:13,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:13,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:13,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:13,703 INFO L87 Difference]: Start difference. First operand 25105 states and 86674 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:14,226 INFO L93 Difference]: Finished difference Result 28252 states and 95729 transitions. [2021-08-21 12:07:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:07:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:14,295 INFO L225 Difference]: With dead ends: 28252 [2021-08-21 12:07:14,295 INFO L226 Difference]: Without dead ends: 28252 [2021-08-21 12:07:14,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:07:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-08-21 12:07:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 25259. [2021-08-21 12:07:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25259 states, 25258 states have (on average 3.4541927310159157) internal successors, (87246), 25258 states have internal predecessors, (87246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25259 states to 25259 states and 87246 transitions. [2021-08-21 12:07:14,877 INFO L78 Accepts]: Start accepts. Automaton has 25259 states and 87246 transitions. Word has length 22 [2021-08-21 12:07:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:14,877 INFO L470 AbstractCegarLoop]: Abstraction has 25259 states and 87246 transitions. [2021-08-21 12:07:14,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25259 states and 87246 transitions. [2021-08-21 12:07:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:14,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:14,887 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:14,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:15,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:15,105 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1419725624, now seen corresponding path program 170 times [2021-08-21 12:07:15,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:15,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856633110] [2021-08-21 12:07:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:15,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:15,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:15,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856633110] [2021-08-21 12:07:15,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856633110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:15,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557184022] [2021-08-21 12:07:15,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:15,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:15,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:15,210 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:15,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 12:07:16,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:16,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:16,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:16,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:16,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557184022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:16,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:16,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:16,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661843220] [2021-08-21 12:07:16,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:16,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:16,523 INFO L87 Difference]: Start difference. First operand 25259 states and 87246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:16,786 INFO L93 Difference]: Finished difference Result 27456 states and 93560 transitions. [2021-08-21 12:07:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:07:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:16,937 INFO L225 Difference]: With dead ends: 27456 [2021-08-21 12:07:16,938 INFO L226 Difference]: Without dead ends: 27456 [2021-08-21 12:07:16,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:07:16,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27456 states. [2021-08-21 12:07:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27456 to 24504. [2021-08-21 12:07:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24504 states, 24503 states have (on average 3.4595355670734196) internal successors, (84769), 24503 states have internal predecessors, (84769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24504 states to 24504 states and 84769 transitions. [2021-08-21 12:07:17,551 INFO L78 Accepts]: Start accepts. Automaton has 24504 states and 84769 transitions. Word has length 22 [2021-08-21 12:07:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:17,551 INFO L470 AbstractCegarLoop]: Abstraction has 24504 states and 84769 transitions. [2021-08-21 12:07:17,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 24504 states and 84769 transitions. [2021-08-21 12:07:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:17,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:17,560 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:17,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:17,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:17,763 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:17,764 INFO L82 PathProgramCache]: Analyzing trace with hash 976826484, now seen corresponding path program 171 times [2021-08-21 12:07:17,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:17,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862838912] [2021-08-21 12:07:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:17,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:17,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:17,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862838912] [2021-08-21 12:07:17,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862838912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:17,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753322143] [2021-08-21 12:07:17,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:17,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:17,856 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:17,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 12:07:19,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:07:19,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:19,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753322143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:19,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:19,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:19,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206722037] [2021-08-21 12:07:19,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:19,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:19,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:19,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:19,259 INFO L87 Difference]: Start difference. First operand 24504 states and 84769 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:19,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:19,518 INFO L93 Difference]: Finished difference Result 25923 states and 88710 transitions. [2021-08-21 12:07:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:07:19,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:19,589 INFO L225 Difference]: With dead ends: 25923 [2021-08-21 12:07:19,589 INFO L226 Difference]: Without dead ends: 25923 [2021-08-21 12:07:19,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:07:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25923 states. [2021-08-21 12:07:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25923 to 24906. [2021-08-21 12:07:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24906 states, 24905 states have (on average 3.4593856655290103) internal successors, (86156), 24905 states have internal predecessors, (86156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24906 states to 24906 states and 86156 transitions. [2021-08-21 12:07:20,094 INFO L78 Accepts]: Start accepts. Automaton has 24906 states and 86156 transitions. Word has length 22 [2021-08-21 12:07:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:20,094 INFO L470 AbstractCegarLoop]: Abstraction has 24906 states and 86156 transitions. [2021-08-21 12:07:20,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 24906 states and 86156 transitions. [2021-08-21 12:07:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:20,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:20,102 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:20,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:20,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:20,321 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:20,322 INFO L82 PathProgramCache]: Analyzing trace with hash 131855032, now seen corresponding path program 172 times [2021-08-21 12:07:20,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:20,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146227414] [2021-08-21 12:07:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:20,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:20,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146227414] [2021-08-21 12:07:20,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146227414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365784768] [2021-08-21 12:07:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:20,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:20,404 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:20,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 12:07:21,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:21,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:21,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365784768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:21,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:21,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:21,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37623272] [2021-08-21 12:07:21,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:21,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:21,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:21,862 INFO L87 Difference]: Start difference. First operand 24906 states and 86156 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:22,278 INFO L93 Difference]: Finished difference Result 25726 states and 87889 transitions. [2021-08-21 12:07:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:07:22,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:22,362 INFO L225 Difference]: With dead ends: 25726 [2021-08-21 12:07:22,362 INFO L226 Difference]: Without dead ends: 25726 [2021-08-21 12:07:22,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:07:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25726 states. [2021-08-21 12:07:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25726 to 24929. [2021-08-21 12:07:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24929 states, 24928 states have (on average 3.459403080872914) internal successors, (86236), 24928 states have internal predecessors, (86236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24929 states to 24929 states and 86236 transitions. [2021-08-21 12:07:22,919 INFO L78 Accepts]: Start accepts. Automaton has 24929 states and 86236 transitions. Word has length 22 [2021-08-21 12:07:22,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:22,919 INFO L470 AbstractCegarLoop]: Abstraction has 24929 states and 86236 transitions. [2021-08-21 12:07:22,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 24929 states and 86236 transitions. [2021-08-21 12:07:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:22,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:22,929 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:22,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-08-21 12:07:23,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:23,145 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash -292456204, now seen corresponding path program 173 times [2021-08-21 12:07:23,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:23,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537599652] [2021-08-21 12:07:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:23,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:23,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:23,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537599652] [2021-08-21 12:07:23,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537599652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:23,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832566543] [2021-08-21 12:07:23,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:23,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:23,400 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:23,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 12:07:24,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:07:24,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:24,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:24,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832566543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:24,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:24,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:24,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111697677] [2021-08-21 12:07:24,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:24,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:24,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:24,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:24,818 INFO L87 Difference]: Start difference. First operand 24929 states and 86236 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:25,314 INFO L93 Difference]: Finished difference Result 25947 states and 88381 transitions. [2021-08-21 12:07:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:07:25,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:25,389 INFO L225 Difference]: With dead ends: 25947 [2021-08-21 12:07:25,389 INFO L226 Difference]: Without dead ends: 25947 [2021-08-21 12:07:25,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:07:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25947 states. [2021-08-21 12:07:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25947 to 24915. [2021-08-21 12:07:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24915 states, 24914 states have (on average 3.459741510797142) internal successors, (86196), 24914 states have internal predecessors, (86196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24915 states to 24915 states and 86196 transitions. [2021-08-21 12:07:26,175 INFO L78 Accepts]: Start accepts. Automaton has 24915 states and 86196 transitions. Word has length 22 [2021-08-21 12:07:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:26,175 INFO L470 AbstractCegarLoop]: Abstraction has 24915 states and 86196 transitions. [2021-08-21 12:07:26,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 24915 states and 86196 transitions. [2021-08-21 12:07:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:26,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:26,185 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:26,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:26,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-08-21 12:07:26,405 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash 314368292, now seen corresponding path program 174 times [2021-08-21 12:07:26,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:26,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20688592] [2021-08-21 12:07:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:26,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:26,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:26,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20688592] [2021-08-21 12:07:26,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20688592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:26,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68185297] [2021-08-21 12:07:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:26,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:26,511 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:26,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 12:07:27,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:07:27,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:28,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68185297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:28,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:28,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:07:28,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022873998] [2021-08-21 12:07:28,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:07:28,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:07:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:28,031 INFO L87 Difference]: Start difference. First operand 24915 states and 86196 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:28,296 INFO L93 Difference]: Finished difference Result 25321 states and 86916 transitions. [2021-08-21 12:07:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:07:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:28,358 INFO L225 Difference]: With dead ends: 25321 [2021-08-21 12:07:28,359 INFO L226 Difference]: Without dead ends: 25317 [2021-08-21 12:07:28,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:07:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25317 states. [2021-08-21 12:07:28,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25317 to 25018. [2021-08-21 12:07:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25018 states, 25017 states have (on average 3.4590078746452413) internal successors, (86534), 25017 states have internal predecessors, (86534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25018 states to 25018 states and 86534 transitions. [2021-08-21 12:07:28,916 INFO L78 Accepts]: Start accepts. Automaton has 25018 states and 86534 transitions. Word has length 22 [2021-08-21 12:07:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:28,916 INFO L470 AbstractCegarLoop]: Abstraction has 25018 states and 86534 transitions. [2021-08-21 12:07:28,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 25018 states and 86534 transitions. [2021-08-21 12:07:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:28,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:28,925 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:28,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:29,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 12:07:29,145 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:29,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1542503564, now seen corresponding path program 175 times [2021-08-21 12:07:29,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:29,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275959889] [2021-08-21 12:07:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:29,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:29,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:29,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275959889] [2021-08-21 12:07:29,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275959889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:29,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264498782] [2021-08-21 12:07:29,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:29,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:29,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:29,214 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:29,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 12:07:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:30,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:30,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:30,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264498782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:30,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:30,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:07:30,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017486088] [2021-08-21 12:07:30,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:07:30,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:30,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:07:30,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:30,699 INFO L87 Difference]: Start difference. First operand 25018 states and 86534 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:30,886 INFO L93 Difference]: Finished difference Result 25602 states and 87692 transitions. [2021-08-21 12:07:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:07:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:30,948 INFO L225 Difference]: With dead ends: 25602 [2021-08-21 12:07:30,948 INFO L226 Difference]: Without dead ends: 25602 [2021-08-21 12:07:30,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25602 states. [2021-08-21 12:07:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25602 to 25046. [2021-08-21 12:07:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25046 states, 25045 states have (on average 3.4582950688760232) internal successors, (86613), 25045 states have internal predecessors, (86613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25046 states to 25046 states and 86613 transitions. [2021-08-21 12:07:31,589 INFO L78 Accepts]: Start accepts. Automaton has 25046 states and 86613 transitions. Word has length 22 [2021-08-21 12:07:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:31,589 INFO L470 AbstractCegarLoop]: Abstraction has 25046 states and 86613 transitions. [2021-08-21 12:07:31,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 25046 states and 86613 transitions. [2021-08-21 12:07:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:31,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:31,597 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:31,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:31,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-21 12:07:31,813 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash 168109744, now seen corresponding path program 176 times [2021-08-21 12:07:31,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:31,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847626738] [2021-08-21 12:07:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:31,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:31,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:31,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847626738] [2021-08-21 12:07:31,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847626738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:31,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046985784] [2021-08-21 12:07:31,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:31,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:31,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:31,895 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:31,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 12:07:33,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:33,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:33,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:33,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:33,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046985784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:33,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:33,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:07:33,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652196490] [2021-08-21 12:07:33,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:33,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:33,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:33,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:33,341 INFO L87 Difference]: Start difference. First operand 25046 states and 86613 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:33,546 INFO L93 Difference]: Finished difference Result 25784 states and 88183 transitions. [2021-08-21 12:07:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:07:33,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:33,609 INFO L225 Difference]: With dead ends: 25784 [2021-08-21 12:07:33,609 INFO L226 Difference]: Without dead ends: 25784 [2021-08-21 12:07:33,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:07:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25784 states. [2021-08-21 12:07:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25784 to 25089. [2021-08-21 12:07:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25089 states, 25088 states have (on average 3.456672512755102) internal successors, (86721), 25088 states have internal predecessors, (86721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25089 states to 25089 states and 86721 transitions. [2021-08-21 12:07:34,166 INFO L78 Accepts]: Start accepts. Automaton has 25089 states and 86721 transitions. Word has length 22 [2021-08-21 12:07:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:34,166 INFO L470 AbstractCegarLoop]: Abstraction has 25089 states and 86721 transitions. [2021-08-21 12:07:34,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 25089 states and 86721 transitions. [2021-08-21 12:07:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:34,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:34,175 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:34,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:34,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:34,395 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1657514740, now seen corresponding path program 177 times [2021-08-21 12:07:34,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:34,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744022854] [2021-08-21 12:07:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:34,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:34,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:34,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744022854] [2021-08-21 12:07:34,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744022854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:34,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544310600] [2021-08-21 12:07:34,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:34,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:34,475 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:34,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 12:07:35,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:07:35,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:35,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:35,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544310600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:35,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:35,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:07:35,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855779621] [2021-08-21 12:07:35,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:35,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:35,954 INFO L87 Difference]: Start difference. First operand 25089 states and 86721 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:36,191 INFO L93 Difference]: Finished difference Result 32766 states and 111942 transitions. [2021-08-21 12:07:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:07:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:36,376 INFO L225 Difference]: With dead ends: 32766 [2021-08-21 12:07:36,376 INFO L226 Difference]: Without dead ends: 32766 [2021-08-21 12:07:36,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:07:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32766 states. [2021-08-21 12:07:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32766 to 31768. [2021-08-21 12:07:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31768 states, 31767 states have (on average 3.4546542009003054) internal successors, (109744), 31767 states have internal predecessors, (109744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31768 states to 31768 states and 109744 transitions. [2021-08-21 12:07:36,967 INFO L78 Accepts]: Start accepts. Automaton has 31768 states and 109744 transitions. Word has length 22 [2021-08-21 12:07:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:36,967 INFO L470 AbstractCegarLoop]: Abstraction has 31768 states and 109744 transitions. [2021-08-21 12:07:36,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 31768 states and 109744 transitions. [2021-08-21 12:07:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:36,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:36,977 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:36,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:37,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:37,198 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:37,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:37,199 INFO L82 PathProgramCache]: Analyzing trace with hash 584429360, now seen corresponding path program 178 times [2021-08-21 12:07:37,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:37,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226659178] [2021-08-21 12:07:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:37,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:37,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:37,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226659178] [2021-08-21 12:07:37,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226659178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:37,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106829176] [2021-08-21 12:07:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:37,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:37,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:37,384 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:37,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 12:07:38,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:38,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:38,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:38,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:38,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106829176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:38,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:38,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:07:38,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554573191] [2021-08-21 12:07:38,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:07:38,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:38,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:07:38,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:07:38,799 INFO L87 Difference]: Start difference. First operand 31768 states and 109744 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:39,064 INFO L93 Difference]: Finished difference Result 33992 states and 116356 transitions. [2021-08-21 12:07:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:07:39,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:39,150 INFO L225 Difference]: With dead ends: 33992 [2021-08-21 12:07:39,150 INFO L226 Difference]: Without dead ends: 33992 [2021-08-21 12:07:39,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:07:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33992 states. [2021-08-21 12:07:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33992 to 33636. [2021-08-21 12:07:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33636 states, 33635 states have (on average 3.4431395867400028) internal successors, (115810), 33635 states have internal predecessors, (115810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33636 states to 33636 states and 115810 transitions. [2021-08-21 12:07:40,085 INFO L78 Accepts]: Start accepts. Automaton has 33636 states and 115810 transitions. Word has length 22 [2021-08-21 12:07:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:40,085 INFO L470 AbstractCegarLoop]: Abstraction has 33636 states and 115810 transitions. [2021-08-21 12:07:40,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 33636 states and 115810 transitions. [2021-08-21 12:07:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:40,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:40,096 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:40,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:40,312 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1678520948, now seen corresponding path program 179 times [2021-08-21 12:07:40,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:40,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974458433] [2021-08-21 12:07:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:40,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:40,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:40,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974458433] [2021-08-21 12:07:40,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974458433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:40,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847808276] [2021-08-21 12:07:40,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:40,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:40,405 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:40,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 12:07:41,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:07:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:41,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847808276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:41,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:41,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:41,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298715707] [2021-08-21 12:07:41,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:41,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:41,989 INFO L87 Difference]: Start difference. First operand 33636 states and 115810 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:42,256 INFO L93 Difference]: Finished difference Result 34160 states and 116755 transitions. [2021-08-21 12:07:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:07:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:42,427 INFO L225 Difference]: With dead ends: 34160 [2021-08-21 12:07:42,427 INFO L226 Difference]: Without dead ends: 34160 [2021-08-21 12:07:42,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:07:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34160 states. [2021-08-21 12:07:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34160 to 33646. [2021-08-21 12:07:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33646 states, 33645 states have (on average 3.4425026006836084) internal successors, (115823), 33645 states have internal predecessors, (115823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33646 states to 33646 states and 115823 transitions. [2021-08-21 12:07:43,109 INFO L78 Accepts]: Start accepts. Automaton has 33646 states and 115823 transitions. Word has length 22 [2021-08-21 12:07:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:43,109 INFO L470 AbstractCegarLoop]: Abstraction has 33646 states and 115823 transitions. [2021-08-21 12:07:43,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 33646 states and 115823 transitions. [2021-08-21 12:07:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:43,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:43,118 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:43,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:43,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:43,338 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:43,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1235621808, now seen corresponding path program 180 times [2021-08-21 12:07:43,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:43,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966592047] [2021-08-21 12:07:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:43,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:43,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:43,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966592047] [2021-08-21 12:07:43,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966592047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:43,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097671407] [2021-08-21 12:07:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:43,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:43,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:43,438 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:43,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 12:07:44,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:07:44,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:44,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097671407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:44,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:44,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:44,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499021971] [2021-08-21 12:07:44,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:44,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:44,953 INFO L87 Difference]: Start difference. First operand 33646 states and 115823 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:45,360 INFO L93 Difference]: Finished difference Result 34492 states and 117933 transitions. [2021-08-21 12:07:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:07:45,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:45,444 INFO L225 Difference]: With dead ends: 34492 [2021-08-21 12:07:45,444 INFO L226 Difference]: Without dead ends: 34492 [2021-08-21 12:07:45,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:07:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34492 states. [2021-08-21 12:07:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34492 to 34149. [2021-08-21 12:07:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34149 states, 34148 states have (on average 3.436980203818672) internal successors, (117366), 34148 states have internal predecessors, (117366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34149 states to 34149 states and 117366 transitions. [2021-08-21 12:07:46,183 INFO L78 Accepts]: Start accepts. Automaton has 34149 states and 117366 transitions. Word has length 22 [2021-08-21 12:07:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:46,183 INFO L470 AbstractCegarLoop]: Abstraction has 34149 states and 117366 transitions. [2021-08-21 12:07:46,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 34149 states and 117366 transitions. [2021-08-21 12:07:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:46,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:46,193 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:46,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:46,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-21 12:07:46,413 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:46,414 INFO L82 PathProgramCache]: Analyzing trace with hash 390650356, now seen corresponding path program 181 times [2021-08-21 12:07:46,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:46,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716770301] [2021-08-21 12:07:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:46,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:46,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:46,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716770301] [2021-08-21 12:07:46,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716770301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:46,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060968232] [2021-08-21 12:07:46,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:46,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:46,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:46,512 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:46,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 12:07:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:48,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:48,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060968232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:48,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:48,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:48,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928106262] [2021-08-21 12:07:48,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:48,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:48,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:48,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:48,058 INFO L87 Difference]: Start difference. First operand 34149 states and 117366 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:48,552 INFO L93 Difference]: Finished difference Result 34789 states and 118786 transitions. [2021-08-21 12:07:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:07:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:48,648 INFO L225 Difference]: With dead ends: 34789 [2021-08-21 12:07:48,648 INFO L226 Difference]: Without dead ends: 34789 [2021-08-21 12:07:48,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:07:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34789 states. [2021-08-21 12:07:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34789 to 34413. [2021-08-21 12:07:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34413 states, 34412 states have (on average 3.4337731024061373) internal successors, (118163), 34412 states have internal predecessors, (118163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34413 states to 34413 states and 118163 transitions. [2021-08-21 12:07:49,431 INFO L78 Accepts]: Start accepts. Automaton has 34413 states and 118163 transitions. Word has length 22 [2021-08-21 12:07:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:49,431 INFO L470 AbstractCegarLoop]: Abstraction has 34413 states and 118163 transitions. [2021-08-21 12:07:49,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34413 states and 118163 transitions. [2021-08-21 12:07:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:49,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:49,442 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:49,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:49,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:49,661 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:49,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:49,662 INFO L82 PathProgramCache]: Analyzing trace with hash -33660880, now seen corresponding path program 182 times [2021-08-21 12:07:49,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:49,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006512730] [2021-08-21 12:07:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:49,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:49,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:49,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006512730] [2021-08-21 12:07:49,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006512730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:49,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688967617] [2021-08-21 12:07:49,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:49,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:49,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:49,765 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:49,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 12:07:51,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:51,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:51,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688967617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:51,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:51,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:51,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025828560] [2021-08-21 12:07:51,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:51,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:51,545 INFO L87 Difference]: Start difference. First operand 34413 states and 118163 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:52,026 INFO L93 Difference]: Finished difference Result 35038 states and 119408 transitions. [2021-08-21 12:07:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:07:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:52,110 INFO L225 Difference]: With dead ends: 35038 [2021-08-21 12:07:52,111 INFO L226 Difference]: Without dead ends: 35038 [2021-08-21 12:07:52,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:07:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35038 states. [2021-08-21 12:07:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35038 to 34515. [2021-08-21 12:07:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34515 states, 34514 states have (on average 3.432491163006316) internal successors, (118469), 34514 states have internal predecessors, (118469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 118469 transitions. [2021-08-21 12:07:53,290 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 118469 transitions. Word has length 22 [2021-08-21 12:07:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:53,290 INFO L470 AbstractCegarLoop]: Abstraction has 34515 states and 118469 transitions. [2021-08-21 12:07:53,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 118469 transitions. [2021-08-21 12:07:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:53,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:53,300 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:53,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:53,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:53,519 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash -302407308, now seen corresponding path program 183 times [2021-08-21 12:07:53,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:53,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781429074] [2021-08-21 12:07:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:53,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:53,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:53,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781429074] [2021-08-21 12:07:53,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781429074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:53,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502206831] [2021-08-21 12:07:53,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:53,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:53,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:53,628 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:53,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 12:07:55,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:07:55,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:55,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:55,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:55,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502206831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:55,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:55,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:07:55,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12445828] [2021-08-21 12:07:55,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:07:55,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:07:55,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:07:55,160 INFO L87 Difference]: Start difference. First operand 34515 states and 118469 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:55,735 INFO L93 Difference]: Finished difference Result 35498 states and 120694 transitions. [2021-08-21 12:07:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:07:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:55,817 INFO L225 Difference]: With dead ends: 35498 [2021-08-21 12:07:55,818 INFO L226 Difference]: Without dead ends: 35498 [2021-08-21 12:07:55,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=778, Invalid=1574, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:07:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35498 states. [2021-08-21 12:07:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35498 to 34626. [2021-08-21 12:07:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34626 states, 34625 states have (on average 3.431104693140794) internal successors, (118802), 34625 states have internal predecessors, (118802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34626 states to 34626 states and 118802 transitions. [2021-08-21 12:07:56,528 INFO L78 Accepts]: Start accepts. Automaton has 34626 states and 118802 transitions. Word has length 22 [2021-08-21 12:07:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:56,528 INFO L470 AbstractCegarLoop]: Abstraction has 34626 states and 118802 transitions. [2021-08-21 12:07:56,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 34626 states and 118802 transitions. [2021-08-21 12:07:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:56,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:56,539 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:56,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-21 12:07:56,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:56,757 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:56,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1848745904, now seen corresponding path program 184 times [2021-08-21 12:07:56,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:56,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969381394] [2021-08-21 12:07:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:56,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:56,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:56,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969381394] [2021-08-21 12:07:56,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969381394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:56,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421534374] [2021-08-21 12:07:56,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:56,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:56,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:56,839 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:07:56,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 12:07:58,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:58,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:58,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:07:58,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:58,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421534374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:58,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:58,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:07:58,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054750029] [2021-08-21 12:07:58,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:07:58,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:07:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:58,541 INFO L87 Difference]: Start difference. First operand 34626 states and 118802 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:59,045 INFO L93 Difference]: Finished difference Result 35011 states and 119398 transitions. [2021-08-21 12:07:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:07:59,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:07:59,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:59,133 INFO L225 Difference]: With dead ends: 35011 [2021-08-21 12:07:59,134 INFO L226 Difference]: Without dead ends: 35007 [2021-08-21 12:07:59,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:07:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35007 states. [2021-08-21 12:07:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35007 to 33849. [2021-08-21 12:07:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33849 states, 33848 states have (on average 3.426229023871425) internal successors, (115971), 33848 states have internal predecessors, (115971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33849 states to 33849 states and 115971 transitions. [2021-08-21 12:07:59,921 INFO L78 Accepts]: Start accepts. Automaton has 33849 states and 115971 transitions. Word has length 22 [2021-08-21 12:07:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:59,921 INFO L470 AbstractCegarLoop]: Abstraction has 33849 states and 115971 transitions. [2021-08-21 12:07:59,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 33849 states and 115971 transitions. [2021-08-21 12:07:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:07:59,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:59,931 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:59,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:00,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:00,151 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1264087344, now seen corresponding path program 185 times [2021-08-21 12:08:00,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:00,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115800401] [2021-08-21 12:08:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:00,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:00,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:00,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115800401] [2021-08-21 12:08:00,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115800401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:00,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340046324] [2021-08-21 12:08:00,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:00,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:00,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:00,244 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:00,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 12:08:01,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:08:01,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:01,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:01,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:02,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340046324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:02,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:02,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:08:02,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078316078] [2021-08-21 12:08:02,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:02,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:02,030 INFO L87 Difference]: Start difference. First operand 33849 states and 115971 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:02,435 INFO L93 Difference]: Finished difference Result 42320 states and 142026 transitions. [2021-08-21 12:08:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 12:08:02,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:02,540 INFO L225 Difference]: With dead ends: 42320 [2021-08-21 12:08:02,540 INFO L226 Difference]: Without dead ends: 42320 [2021-08-21 12:08:02,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=452, Invalid=880, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:08:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42320 states. [2021-08-21 12:08:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42320 to 39983. [2021-08-21 12:08:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39983 states, 39982 states have (on average 3.403156420389175) internal successors, (136065), 39982 states have internal predecessors, (136065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39983 states to 39983 states and 136065 transitions. [2021-08-21 12:08:03,592 INFO L78 Accepts]: Start accepts. Automaton has 39983 states and 136065 transitions. Word has length 22 [2021-08-21 12:08:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:03,592 INFO L470 AbstractCegarLoop]: Abstraction has 39983 states and 136065 transitions. [2021-08-21 12:08:03,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:03,593 INFO L276 IsEmpty]: Start isEmpty. Operand 39983 states and 136065 transitions. [2021-08-21 12:08:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:03,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:03,603 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:03,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:03,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:03,823 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash 839776108, now seen corresponding path program 186 times [2021-08-21 12:08:03,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:03,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149498283] [2021-08-21 12:08:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:03,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:03,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:03,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149498283] [2021-08-21 12:08:03,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149498283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:03,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63176809] [2021-08-21 12:08:03,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:03,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:03,913 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:03,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 12:08:05,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:08:05,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:05,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:05,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63176809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:05,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:05,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:05,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052071843] [2021-08-21 12:08:05,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:05,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:05,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:05,608 INFO L87 Difference]: Start difference. First operand 39983 states and 136065 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:06,147 INFO L93 Difference]: Finished difference Result 47585 states and 159538 transitions. [2021-08-21 12:08:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:08:06,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:06,286 INFO L225 Difference]: With dead ends: 47585 [2021-08-21 12:08:06,286 INFO L226 Difference]: Without dead ends: 47585 [2021-08-21 12:08:06,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=461, Invalid=871, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:08:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47585 states. [2021-08-21 12:08:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47585 to 35328. [2021-08-21 12:08:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35328 states, 35327 states have (on average 3.3998641265887284) internal successors, (120107), 35327 states have internal predecessors, (120107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35328 states to 35328 states and 120107 transitions. [2021-08-21 12:08:07,244 INFO L78 Accepts]: Start accepts. Automaton has 35328 states and 120107 transitions. Word has length 22 [2021-08-21 12:08:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:07,244 INFO L470 AbstractCegarLoop]: Abstraction has 35328 states and 120107 transitions. [2021-08-21 12:08:07,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 35328 states and 120107 transitions. [2021-08-21 12:08:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:07,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:07,483 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:07,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:07,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 12:08:07,702 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash -5195344, now seen corresponding path program 187 times [2021-08-21 12:08:07,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:07,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445292193] [2021-08-21 12:08:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:07,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:07,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:07,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445292193] [2021-08-21 12:08:07,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445292193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:07,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123825055] [2021-08-21 12:08:07,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:07,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:07,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:07,799 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:07,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 12:08:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:09,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:09,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123825055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:09,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:09,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:09,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641059909] [2021-08-21 12:08:09,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:09,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:09,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:09,379 INFO L87 Difference]: Start difference. First operand 35328 states and 120107 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:09,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:09,879 INFO L93 Difference]: Finished difference Result 40413 states and 135143 transitions. [2021-08-21 12:08:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:08:09,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:10,139 INFO L225 Difference]: With dead ends: 40413 [2021-08-21 12:08:10,139 INFO L226 Difference]: Without dead ends: 40413 [2021-08-21 12:08:10,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=641, Invalid=1251, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:08:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40413 states. [2021-08-21 12:08:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40413 to 35338. [2021-08-21 12:08:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35337 states have (on average 3.4020997820980843) internal successors, (120220), 35337 states have internal predecessors, (120220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 120220 transitions. [2021-08-21 12:08:10,908 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 120220 transitions. Word has length 22 [2021-08-21 12:08:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:10,908 INFO L470 AbstractCegarLoop]: Abstraction has 35338 states and 120220 transitions. [2021-08-21 12:08:10,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 120220 transitions. [2021-08-21 12:08:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:10,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:10,919 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:10,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:11,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 12:08:11,136 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:11,136 INFO L82 PathProgramCache]: Analyzing trace with hash 571029680, now seen corresponding path program 188 times [2021-08-21 12:08:11,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:11,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477944486] [2021-08-21 12:08:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:11,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:11,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:11,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477944486] [2021-08-21 12:08:11,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477944486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:11,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701731096] [2021-08-21 12:08:11,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:11,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:11,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:11,230 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:11,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 12:08:12,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:12,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:12,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:12,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701731096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:12,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:12,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:12,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10795867] [2021-08-21 12:08:12,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:12,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:12,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:12,924 INFO L87 Difference]: Start difference. First operand 35338 states and 120220 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:13,434 INFO L93 Difference]: Finished difference Result 37531 states and 126371 transitions. [2021-08-21 12:08:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:08:13,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:13,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:13,530 INFO L225 Difference]: With dead ends: 37531 [2021-08-21 12:08:13,530 INFO L226 Difference]: Without dead ends: 37531 [2021-08-21 12:08:13,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:08:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37531 states. [2021-08-21 12:08:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37531 to 35002. [2021-08-21 12:08:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35002 states, 35001 states have (on average 3.407531213393903) internal successors, (119267), 35001 states have internal predecessors, (119267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35002 states to 35002 states and 119267 transitions. [2021-08-21 12:08:14,355 INFO L78 Accepts]: Start accepts. Automaton has 35002 states and 119267 transitions. Word has length 22 [2021-08-21 12:08:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:14,355 INFO L470 AbstractCegarLoop]: Abstraction has 35002 states and 119267 transitions. [2021-08-21 12:08:14,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 35002 states and 119267 transitions. [2021-08-21 12:08:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:14,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:14,366 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:14,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:14,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:14,586 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:14,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:14,586 INFO L82 PathProgramCache]: Analyzing trace with hash -273941772, now seen corresponding path program 189 times [2021-08-21 12:08:14,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:14,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510712235] [2021-08-21 12:08:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:14,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:14,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:14,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510712235] [2021-08-21 12:08:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510712235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:14,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393329728] [2021-08-21 12:08:14,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:14,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:14,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:14,836 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:14,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 12:08:16,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:08:16,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:16,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393329728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:16,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:16,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:16,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427372616] [2021-08-21 12:08:16,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:16,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:16,366 INFO L87 Difference]: Start difference. First operand 35002 states and 119267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:16,791 INFO L93 Difference]: Finished difference Result 36543 states and 123234 transitions. [2021-08-21 12:08:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:08:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:16,881 INFO L225 Difference]: With dead ends: 36543 [2021-08-21 12:08:16,882 INFO L226 Difference]: Without dead ends: 36543 [2021-08-21 12:08:16,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:08:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36543 states. [2021-08-21 12:08:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36543 to 35094. [2021-08-21 12:08:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35094 states, 35093 states have (on average 3.40811557860542) internal successors, (119601), 35093 states have internal predecessors, (119601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35094 states to 35094 states and 119601 transitions. [2021-08-21 12:08:17,813 INFO L78 Accepts]: Start accepts. Automaton has 35094 states and 119601 transitions. Word has length 22 [2021-08-21 12:08:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:17,813 INFO L470 AbstractCegarLoop]: Abstraction has 35094 states and 119601 transitions. [2021-08-21 12:08:17,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 35094 states and 119601 transitions. [2021-08-21 12:08:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:17,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:17,824 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:17,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:18,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:18,044 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash -698253008, now seen corresponding path program 190 times [2021-08-21 12:08:18,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:18,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587573030] [2021-08-21 12:08:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:18,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:18,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:18,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587573030] [2021-08-21 12:08:18,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587573030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:18,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770049674] [2021-08-21 12:08:18,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:18,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:18,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:18,145 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:18,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 12:08:19,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:19,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770049674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:19,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:19,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:19,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335571610] [2021-08-21 12:08:19,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:19,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:19,729 INFO L87 Difference]: Start difference. First operand 35094 states and 119601 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:20,267 INFO L93 Difference]: Finished difference Result 36779 states and 123751 transitions. [2021-08-21 12:08:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:08:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:20,362 INFO L225 Difference]: With dead ends: 36779 [2021-08-21 12:08:20,362 INFO L226 Difference]: Without dead ends: 36779 [2021-08-21 12:08:20,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:08:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36779 states. [2021-08-21 12:08:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36779 to 35062. [2021-08-21 12:08:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35062 states, 35061 states have (on average 3.408659193976213) internal successors, (119511), 35061 states have internal predecessors, (119511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35062 states to 35062 states and 119511 transitions. [2021-08-21 12:08:21,206 INFO L78 Accepts]: Start accepts. Automaton has 35062 states and 119511 transitions. Word has length 22 [2021-08-21 12:08:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:21,206 INFO L470 AbstractCegarLoop]: Abstraction has 35062 states and 119511 transitions. [2021-08-21 12:08:21,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 35062 states and 119511 transitions. [2021-08-21 12:08:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:21,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:21,218 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:21,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:21,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:21,438 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash 829825004, now seen corresponding path program 191 times [2021-08-21 12:08:21,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:21,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439806947] [2021-08-21 12:08:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:21,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:21,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:21,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439806947] [2021-08-21 12:08:21,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439806947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:21,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362776705] [2021-08-21 12:08:21,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:21,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:21,534 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:21,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 12:08:23,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:08:23,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:23,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:23,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362776705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:23,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:23,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:23,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718617784] [2021-08-21 12:08:23,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:23,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:23,569 INFO L87 Difference]: Start difference. First operand 35062 states and 119511 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:23,895 INFO L93 Difference]: Finished difference Result 35939 states and 121542 transitions. [2021-08-21 12:08:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:08:23,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:23,985 INFO L225 Difference]: With dead ends: 35939 [2021-08-21 12:08:23,985 INFO L226 Difference]: Without dead ends: 35939 [2021-08-21 12:08:23,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:08:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35939 states. [2021-08-21 12:08:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35939 to 35019. [2021-08-21 12:08:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35019 states, 35018 states have (on average 3.409617910788737) internal successors, (119398), 35018 states have internal predecessors, (119398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35019 states to 35019 states and 119398 transitions. [2021-08-21 12:08:25,080 INFO L78 Accepts]: Start accepts. Automaton has 35019 states and 119398 transitions. Word has length 22 [2021-08-21 12:08:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:25,080 INFO L470 AbstractCegarLoop]: Abstraction has 35019 states and 119398 transitions. [2021-08-21 12:08:25,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 35019 states and 119398 transitions. [2021-08-21 12:08:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:25,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:25,091 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:25,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:25,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:25,311 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash -15146448, now seen corresponding path program 192 times [2021-08-21 12:08:25,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:25,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108439998] [2021-08-21 12:08:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:25,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:25,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:25,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108439998] [2021-08-21 12:08:25,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108439998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:25,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747314907] [2021-08-21 12:08:25,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:25,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:25,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:25,408 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:25,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 12:08:26,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:08:26,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:26,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:26,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747314907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:26,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:26,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:26,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798170573] [2021-08-21 12:08:26,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:26,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:26,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:26,985 INFO L87 Difference]: Start difference. First operand 35019 states and 119398 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:27,340 INFO L93 Difference]: Finished difference Result 35660 states and 120776 transitions. [2021-08-21 12:08:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:08:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:27,582 INFO L225 Difference]: With dead ends: 35660 [2021-08-21 12:08:27,582 INFO L226 Difference]: Without dead ends: 35660 [2021-08-21 12:08:27,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:08:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35660 states. [2021-08-21 12:08:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35660 to 35012. [2021-08-21 12:08:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35012 states, 35011 states have (on average 3.4097854959869753) internal successors, (119380), 35011 states have internal predecessors, (119380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35012 states to 35012 states and 119380 transitions. [2021-08-21 12:08:28,275 INFO L78 Accepts]: Start accepts. Automaton has 35012 states and 119380 transitions. Word has length 22 [2021-08-21 12:08:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:28,275 INFO L470 AbstractCegarLoop]: Abstraction has 35012 states and 119380 transitions. [2021-08-21 12:08:28,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 35012 states and 119380 transitions. [2021-08-21 12:08:28,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:28,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:28,287 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:28,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:28,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:28,507 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash -439457684, now seen corresponding path program 193 times [2021-08-21 12:08:28,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:28,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831521033] [2021-08-21 12:08:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:28,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:28,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:28,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831521033] [2021-08-21 12:08:28,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831521033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:28,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629037307] [2021-08-21 12:08:28,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:28,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:28,608 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:28,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 12:08:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:30,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:30,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:30,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629037307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:30,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:30,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:30,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670564553] [2021-08-21 12:08:30,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:30,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:30,205 INFO L87 Difference]: Start difference. First operand 35012 states and 119380 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:30,807 INFO L93 Difference]: Finished difference Result 35589 states and 120542 transitions. [2021-08-21 12:08:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:08:30,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:30,893 INFO L225 Difference]: With dead ends: 35589 [2021-08-21 12:08:30,893 INFO L226 Difference]: Without dead ends: 35589 [2021-08-21 12:08:30,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=592, Invalid=1214, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:08:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35589 states. [2021-08-21 12:08:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35589 to 34996. [2021-08-21 12:08:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34996 states, 34995 states have (on average 3.409972853264752) internal successors, (119332), 34995 states have internal predecessors, (119332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34996 states to 34996 states and 119332 transitions. [2021-08-21 12:08:31,668 INFO L78 Accepts]: Start accepts. Automaton has 34996 states and 119332 transitions. Word has length 22 [2021-08-21 12:08:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:31,669 INFO L470 AbstractCegarLoop]: Abstraction has 34996 states and 119332 transitions. [2021-08-21 12:08:31,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 34996 states and 119332 transitions. [2021-08-21 12:08:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:31,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:31,679 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:31,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:31,899 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash -708204112, now seen corresponding path program 194 times [2021-08-21 12:08:31,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:31,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195862924] [2021-08-21 12:08:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:31,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:32,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:32,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195862924] [2021-08-21 12:08:32,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195862924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:32,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787109331] [2021-08-21 12:08:32,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:32,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:32,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:32,231 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:32,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 12:08:33,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:33,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:33,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787109331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:33,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:33,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:33,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323793037] [2021-08-21 12:08:33,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:33,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:33,395 INFO L87 Difference]: Start difference. First operand 34996 states and 119332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:33,904 INFO L93 Difference]: Finished difference Result 35854 states and 121247 transitions. [2021-08-21 12:08:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:08:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:33,991 INFO L225 Difference]: With dead ends: 35854 [2021-08-21 12:08:33,991 INFO L226 Difference]: Without dead ends: 35854 [2021-08-21 12:08:33,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=777, Invalid=1575, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:08:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35854 states. [2021-08-21 12:08:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35854 to 34992. [2021-08-21 12:08:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34992 states, 34991 states have (on average 3.410019719356406) internal successors, (119320), 34991 states have internal predecessors, (119320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34992 states to 34992 states and 119320 transitions. [2021-08-21 12:08:34,933 INFO L78 Accepts]: Start accepts. Automaton has 34992 states and 119320 transitions. Word has length 22 [2021-08-21 12:08:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:34,933 INFO L470 AbstractCegarLoop]: Abstraction has 34992 states and 119320 transitions. [2021-08-21 12:08:34,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 34992 states and 119320 transitions. [2021-08-21 12:08:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:34,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:34,944 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:34,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:35,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:35,164 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash -658708060, now seen corresponding path program 195 times [2021-08-21 12:08:35,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:35,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181742282] [2021-08-21 12:08:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:35,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:35,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:35,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181742282] [2021-08-21 12:08:35,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181742282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:35,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259933366] [2021-08-21 12:08:35,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:35,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:35,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:35,243 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:35,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 12:08:36,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:08:36,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:36,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:36,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259933366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:36,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:36,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:08:36,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540915253] [2021-08-21 12:08:36,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:08:36,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:36,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:08:36,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:36,998 INFO L87 Difference]: Start difference. First operand 34992 states and 119320 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:37,453 INFO L93 Difference]: Finished difference Result 36356 states and 123273 transitions. [2021-08-21 12:08:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:08:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:37,561 INFO L225 Difference]: With dead ends: 36356 [2021-08-21 12:08:37,561 INFO L226 Difference]: Without dead ends: 36352 [2021-08-21 12:08:37,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:08:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36352 states. [2021-08-21 12:08:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36352 to 36066. [2021-08-21 12:08:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36066 states, 36065 states have (on average 3.408512408151948) internal successors, (122928), 36065 states have internal predecessors, (122928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36066 states to 36066 states and 122928 transitions. [2021-08-21 12:08:38,504 INFO L78 Accepts]: Start accepts. Automaton has 36066 states and 122928 transitions. Word has length 22 [2021-08-21 12:08:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:38,504 INFO L470 AbstractCegarLoop]: Abstraction has 36066 states and 122928 transitions. [2021-08-21 12:08:38,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 36066 states and 122928 transitions. [2021-08-21 12:08:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:38,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:38,516 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:38,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:38,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:38,726 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1779387380, now seen corresponding path program 196 times [2021-08-21 12:08:38,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:38,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679117792] [2021-08-21 12:08:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:38,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:38,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:38,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679117792] [2021-08-21 12:08:38,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679117792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:38,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469075112] [2021-08-21 12:08:38,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:38,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:38,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:38,812 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:38,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 12:08:40,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:40,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:40,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:40,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:40,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469075112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:40,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:40,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:08:40,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910288865] [2021-08-21 12:08:40,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:08:40,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:40,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:08:40,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:40,697 INFO L87 Difference]: Start difference. First operand 36066 states and 122928 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:40,931 INFO L93 Difference]: Finished difference Result 36770 states and 124459 transitions. [2021-08-21 12:08:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:08:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:41,024 INFO L225 Difference]: With dead ends: 36770 [2021-08-21 12:08:41,024 INFO L226 Difference]: Without dead ends: 36770 [2021-08-21 12:08:41,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:08:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36770 states. [2021-08-21 12:08:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36770 to 36082. [2021-08-21 12:08:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36082 states, 36081 states have (on average 3.408192677586541) internal successors, (122971), 36081 states have internal predecessors, (122971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36082 states to 36082 states and 122971 transitions. [2021-08-21 12:08:41,969 INFO L78 Accepts]: Start accepts. Automaton has 36082 states and 122971 transitions. Word has length 22 [2021-08-21 12:08:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:41,969 INFO L470 AbstractCegarLoop]: Abstraction has 36082 states and 122971 transitions. [2021-08-21 12:08:41,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 36082 states and 122971 transitions. [2021-08-21 12:08:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:41,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:41,982 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:42,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:42,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-21 12:08:42,199 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash -804966608, now seen corresponding path program 197 times [2021-08-21 12:08:42,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:42,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436574737] [2021-08-21 12:08:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:42,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:42,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436574737] [2021-08-21 12:08:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436574737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722055270] [2021-08-21 12:08:42,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:42,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:42,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:42,281 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:42,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 12:08:43,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:08:43,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:43,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722055270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:43,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:43,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:08:43,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921322082] [2021-08-21 12:08:43,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:43,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:43,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:43,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:43,900 INFO L87 Difference]: Start difference. First operand 36082 states and 122971 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:44,157 INFO L93 Difference]: Finished difference Result 37134 states and 125490 transitions. [2021-08-21 12:08:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:08:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:44,320 INFO L225 Difference]: With dead ends: 37134 [2021-08-21 12:08:44,320 INFO L226 Difference]: Without dead ends: 37134 [2021-08-21 12:08:44,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:08:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37134 states. [2021-08-21 12:08:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37134 to 36189. [2021-08-21 12:08:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36189 states, 36188 states have (on average 3.406792306842047) internal successors, (123285), 36188 states have internal predecessors, (123285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36189 states to 36189 states and 123285 transitions. [2021-08-21 12:08:44,999 INFO L78 Accepts]: Start accepts. Automaton has 36189 states and 123285 transitions. Word has length 22 [2021-08-21 12:08:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:44,999 INFO L470 AbstractCegarLoop]: Abstraction has 36189 states and 123285 transitions. [2021-08-21 12:08:44,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 36189 states and 123285 transitions. [2021-08-21 12:08:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:45,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:45,010 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:45,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:45,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 12:08:45,230 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:45,231 INFO L82 PathProgramCache]: Analyzing trace with hash 684438388, now seen corresponding path program 198 times [2021-08-21 12:08:45,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:45,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298027286] [2021-08-21 12:08:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:45,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:45,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:45,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298027286] [2021-08-21 12:08:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298027286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:45,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862374849] [2021-08-21 12:08:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:45,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:45,314 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:45,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 12:08:46,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:08:46,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:46,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862374849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:46,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:46,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:08:46,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949631291] [2021-08-21 12:08:46,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:46,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:46,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:46,969 INFO L87 Difference]: Start difference. First operand 36189 states and 123285 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:47,416 INFO L93 Difference]: Finished difference Result 45716 states and 154442 transitions. [2021-08-21 12:08:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:08:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:47,536 INFO L225 Difference]: With dead ends: 45716 [2021-08-21 12:08:47,536 INFO L226 Difference]: Without dead ends: 45716 [2021-08-21 12:08:47,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:08:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45716 states. [2021-08-21 12:08:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45716 to 41078. [2021-08-21 12:08:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41078 states, 41077 states have (on average 3.405944932687392) internal successors, (139906), 41077 states have internal predecessors, (139906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41078 states to 41078 states and 139906 transitions. [2021-08-21 12:08:48,640 INFO L78 Accepts]: Start accepts. Automaton has 41078 states and 139906 transitions. Word has length 22 [2021-08-21 12:08:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:48,640 INFO L470 AbstractCegarLoop]: Abstraction has 41078 states and 139906 transitions. [2021-08-21 12:08:48,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 41078 states and 139906 transitions. [2021-08-21 12:08:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:48,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:48,651 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:48,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:48,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-21 12:08:48,871 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -388646992, now seen corresponding path program 199 times [2021-08-21 12:08:48,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:48,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77272282] [2021-08-21 12:08:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:48,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:48,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:48,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77272282] [2021-08-21 12:08:48,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77272282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:48,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344325952] [2021-08-21 12:08:48,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:48,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:48,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:48,952 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:48,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 12:08:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:50,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344325952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:50,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:50,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:08:50,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223028797] [2021-08-21 12:08:50,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:50,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:50,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:50,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:50,580 INFO L87 Difference]: Start difference. First operand 41078 states and 139906 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:50,965 INFO L93 Difference]: Finished difference Result 44653 states and 150641 transitions. [2021-08-21 12:08:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:08:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:51,093 INFO L225 Difference]: With dead ends: 44653 [2021-08-21 12:08:51,093 INFO L226 Difference]: Without dead ends: 44653 [2021-08-21 12:08:51,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:08:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44653 states. [2021-08-21 12:08:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44653 to 44067. [2021-08-21 12:08:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44067 states, 44066 states have (on average 3.393409885172242) internal successors, (149534), 44066 states have internal predecessors, (149534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44067 states to 44067 states and 149534 transitions. [2021-08-21 12:08:52,148 INFO L78 Accepts]: Start accepts. Automaton has 44067 states and 149534 transitions. Word has length 22 [2021-08-21 12:08:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:52,149 INFO L470 AbstractCegarLoop]: Abstraction has 44067 states and 149534 transitions. [2021-08-21 12:08:52,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 44067 states and 149534 transitions. [2021-08-21 12:08:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:52,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:52,160 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:52,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:52,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 12:08:52,380 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:52,381 INFO L82 PathProgramCache]: Analyzing trace with hash 705444596, now seen corresponding path program 200 times [2021-08-21 12:08:52,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:52,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453027372] [2021-08-21 12:08:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:52,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:52,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:52,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453027372] [2021-08-21 12:08:52,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453027372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:52,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451350510] [2021-08-21 12:08:52,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:52,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:52,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:52,463 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:52,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 12:08:54,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:54,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:54,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:54,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451350510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:54,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:54,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:08:54,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394511607] [2021-08-21 12:08:54,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:08:54,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:08:54,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:08:54,351 INFO L87 Difference]: Start difference. First operand 44067 states and 149534 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:54,595 INFO L93 Difference]: Finished difference Result 44737 states and 151198 transitions. [2021-08-21 12:08:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:08:54,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:54,716 INFO L225 Difference]: With dead ends: 44737 [2021-08-21 12:08:54,717 INFO L226 Difference]: Without dead ends: 44737 [2021-08-21 12:08:54,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:08:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44737 states. [2021-08-21 12:08:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44737 to 44520. [2021-08-21 12:08:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44520 states, 44519 states have (on average 3.3897886295738897) internal successors, (150910), 44519 states have internal predecessors, (150910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44520 states to 44520 states and 150910 transitions. [2021-08-21 12:08:55,686 INFO L78 Accepts]: Start accepts. Automaton has 44520 states and 150910 transitions. Word has length 22 [2021-08-21 12:08:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:55,686 INFO L470 AbstractCegarLoop]: Abstraction has 44520 states and 150910 transitions. [2021-08-21 12:08:55,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 44520 states and 150910 transitions. [2021-08-21 12:08:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:55,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:55,697 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:55,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:55,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:55,916 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash 262545456, now seen corresponding path program 201 times [2021-08-21 12:08:55,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:55,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679400307] [2021-08-21 12:08:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:55,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:56,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:56,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679400307] [2021-08-21 12:08:56,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679400307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:56,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517602571] [2021-08-21 12:08:56,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:56,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:56,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:56,012 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:56,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 12:08:57,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:08:57,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:57,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:08:57,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:57,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517602571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:57,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:57,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:08:57,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774605673] [2021-08-21 12:08:57,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:08:57,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:08:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:57,806 INFO L87 Difference]: Start difference. First operand 44520 states and 150910 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:58,124 INFO L93 Difference]: Finished difference Result 44855 states and 151456 transitions. [2021-08-21 12:08:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:08:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:08:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:58,311 INFO L225 Difference]: With dead ends: 44855 [2021-08-21 12:08:58,311 INFO L226 Difference]: Without dead ends: 44855 [2021-08-21 12:08:58,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:08:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44855 states. [2021-08-21 12:08:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44855 to 44511. [2021-08-21 12:08:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44511 states, 44510 states have (on average 3.3898225117951024) internal successors, (150881), 44510 states have internal predecessors, (150881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:59,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44511 states to 44511 states and 150881 transitions. [2021-08-21 12:08:59,565 INFO L78 Accepts]: Start accepts. Automaton has 44511 states and 150881 transitions. Word has length 22 [2021-08-21 12:08:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:59,565 INFO L470 AbstractCegarLoop]: Abstraction has 44511 states and 150881 transitions. [2021-08-21 12:08:59,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 44511 states and 150881 transitions. [2021-08-21 12:08:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:08:59,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:59,578 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:59,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:59,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:59,793 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash -582425996, now seen corresponding path program 202 times [2021-08-21 12:08:59,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:59,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969169778] [2021-08-21 12:08:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:59,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:59,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:59,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969169778] [2021-08-21 12:08:59,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969169778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:59,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191472056] [2021-08-21 12:08:59,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:59,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:59,872 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:08:59,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 12:09:01,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:01,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:01,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:01,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191472056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:01,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:01,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:01,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488794152] [2021-08-21 12:09:01,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:01,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:01,463 INFO L87 Difference]: Start difference. First operand 44511 states and 150881 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:01,909 INFO L93 Difference]: Finished difference Result 45012 states and 152002 transitions. [2021-08-21 12:09:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:09:01,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:02,104 INFO L225 Difference]: With dead ends: 45012 [2021-08-21 12:09:02,104 INFO L226 Difference]: Without dead ends: 45012 [2021-08-21 12:09:02,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:09:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45012 states. [2021-08-21 12:09:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45012 to 44703. [2021-08-21 12:09:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44703 states, 44702 states have (on average 3.388192922016912) internal successors, (151459), 44702 states have internal predecessors, (151459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44703 states to 44703 states and 151459 transitions. [2021-08-21 12:09:03,361 INFO L78 Accepts]: Start accepts. Automaton has 44703 states and 151459 transitions. Word has length 22 [2021-08-21 12:09:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:03,384 INFO L470 AbstractCegarLoop]: Abstraction has 44703 states and 151459 transitions. [2021-08-21 12:09:03,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 44703 states and 151459 transitions. [2021-08-21 12:09:03,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:03,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:03,396 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:03,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:03,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-21 12:09:03,633 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1006737232, now seen corresponding path program 203 times [2021-08-21 12:09:03,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:03,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931044843] [2021-08-21 12:09:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:03,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:03,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:03,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931044843] [2021-08-21 12:09:03,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931044843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:03,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729350118] [2021-08-21 12:09:03,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:03,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:03,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:03,734 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:03,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 12:09:05,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:09:05,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:05,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:05,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729350118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:05,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:05,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:05,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039219378] [2021-08-21 12:09:05,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:05,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:05,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:05,477 INFO L87 Difference]: Start difference. First operand 44703 states and 151459 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:05,978 INFO L93 Difference]: Finished difference Result 45138 states and 152319 transitions. [2021-08-21 12:09:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:09:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:06,174 INFO L225 Difference]: With dead ends: 45138 [2021-08-21 12:09:06,174 INFO L226 Difference]: Without dead ends: 45138 [2021-08-21 12:09:06,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:09:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45138 states. [2021-08-21 12:09:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45138 to 44778. [2021-08-21 12:09:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44778 states, 44777 states have (on average 3.387542711660004) internal successors, (151684), 44777 states have internal predecessors, (151684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44778 states to 44778 states and 151684 transitions. [2021-08-21 12:09:07,444 INFO L78 Accepts]: Start accepts. Automaton has 44778 states and 151684 transitions. Word has length 22 [2021-08-21 12:09:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:07,445 INFO L470 AbstractCegarLoop]: Abstraction has 44778 states and 151684 transitions. [2021-08-21 12:09:07,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 44778 states and 151684 transitions. [2021-08-21 12:09:07,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:07,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:07,459 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:07,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2021-08-21 12:09:07,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-21 12:09:07,665 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1275483660, now seen corresponding path program 204 times [2021-08-21 12:09:07,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:07,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661970828] [2021-08-21 12:09:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:07,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:07,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:07,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661970828] [2021-08-21 12:09:07,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661970828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:07,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784817135] [2021-08-21 12:09:07,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:07,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:07,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:07,765 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:07,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 12:09:09,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:09:09,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:09,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:09,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:09,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784817135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:09,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:09,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:09,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800074201] [2021-08-21 12:09:09,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:09,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:09,444 INFO L87 Difference]: Start difference. First operand 44778 states and 151684 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:09,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:09,989 INFO L93 Difference]: Finished difference Result 45360 states and 152909 transitions. [2021-08-21 12:09:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 12:09:09,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:10,110 INFO L225 Difference]: With dead ends: 45360 [2021-08-21 12:09:10,110 INFO L226 Difference]: Without dead ends: 45360 [2021-08-21 12:09:10,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=591, Invalid=1215, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:09:10,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45360 states. [2021-08-21 12:09:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45360 to 44814. [2021-08-21 12:09:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44814 states, 44813 states have (on average 3.387231383750251) internal successors, (151792), 44813 states have internal predecessors, (151792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44814 states to 44814 states and 151792 transitions. [2021-08-21 12:09:11,176 INFO L78 Accepts]: Start accepts. Automaton has 44814 states and 151792 transitions. Word has length 22 [2021-08-21 12:09:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:11,176 INFO L470 AbstractCegarLoop]: Abstraction has 44814 states and 151792 transitions. [2021-08-21 12:09:11,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 44814 states and 151792 transitions. [2021-08-21 12:09:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:11,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:11,187 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:11,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:11,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:11,404 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1016688336, now seen corresponding path program 205 times [2021-08-21 12:09:11,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:11,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366205469] [2021-08-21 12:09:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:11,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:11,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:11,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366205469] [2021-08-21 12:09:11,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366205469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:11,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474339056] [2021-08-21 12:09:11,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:11,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:11,519 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:11,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 12:09:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:13,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:13,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474339056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:13,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:13,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:13,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505810946] [2021-08-21 12:09:13,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:13,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:13,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:13,217 INFO L87 Difference]: Start difference. First operand 44814 states and 151792 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:13,808 INFO L93 Difference]: Finished difference Result 45802 states and 154191 transitions. [2021-08-21 12:09:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:09:13,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:13,922 INFO L225 Difference]: With dead ends: 45802 [2021-08-21 12:09:13,923 INFO L226 Difference]: Without dead ends: 45802 [2021-08-21 12:09:13,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:09:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45802 states. [2021-08-21 12:09:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45802 to 44851. [2021-08-21 12:09:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44851 states, 44850 states have (on average 3.386911928651059) internal successors, (151903), 44850 states have internal predecessors, (151903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44851 states to 44851 states and 151903 transitions. [2021-08-21 12:09:15,047 INFO L78 Accepts]: Start accepts. Automaton has 44851 states and 151903 transitions. Word has length 22 [2021-08-21 12:09:15,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:15,047 INFO L470 AbstractCegarLoop]: Abstraction has 44851 states and 151903 transitions. [2021-08-21 12:09:15,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:15,047 INFO L276 IsEmpty]: Start isEmpty. Operand 44851 states and 151903 transitions. [2021-08-21 12:09:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:15,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:15,059 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:15,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:15,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-08-21 12:09:15,276 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:15,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2141020428, now seen corresponding path program 206 times [2021-08-21 12:09:15,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:15,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102939737] [2021-08-21 12:09:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:15,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:15,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:15,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102939737] [2021-08-21 12:09:15,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102939737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:15,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819950288] [2021-08-21 12:09:15,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:15,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:15,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:15,391 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:15,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 12:09:17,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:17,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:17,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:17,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819950288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:17,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:17,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:09:17,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226421431] [2021-08-21 12:09:17,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:09:17,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:09:17,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:09:17,152 INFO L87 Difference]: Start difference. First operand 44851 states and 151903 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:17,591 INFO L93 Difference]: Finished difference Result 45170 states and 152306 transitions. [2021-08-21 12:09:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:09:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:17,709 INFO L225 Difference]: With dead ends: 45170 [2021-08-21 12:09:17,710 INFO L226 Difference]: Without dead ends: 45166 [2021-08-21 12:09:17,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:09:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45166 states. [2021-08-21 12:09:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45166 to 44804. [2021-08-21 12:09:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44804 states, 44803 states have (on average 3.38655893578555) internal successors, (151728), 44803 states have internal predecessors, (151728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44804 states to 44804 states and 151728 transitions. [2021-08-21 12:09:18,759 INFO L78 Accepts]: Start accepts. Automaton has 44804 states and 151728 transitions. Word has length 22 [2021-08-21 12:09:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:18,760 INFO L470 AbstractCegarLoop]: Abstraction has 44804 states and 151728 transitions. [2021-08-21 12:09:18,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 44804 states and 151728 transitions. [2021-08-21 12:09:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:18,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:18,772 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:18,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:18,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:18,992 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash 300005620, now seen corresponding path program 207 times [2021-08-21 12:09:18,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:18,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062459199] [2021-08-21 12:09:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:18,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:19,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:19,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062459199] [2021-08-21 12:09:19,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062459199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:19,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386300732] [2021-08-21 12:09:19,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:19,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:19,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:19,100 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:19,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 12:09:21,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:09:21,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:21,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:21,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:21,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386300732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:21,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:21,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:21,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969746476] [2021-08-21 12:09:21,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:21,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:21,129 INFO L87 Difference]: Start difference. First operand 44804 states and 151728 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:21,700 INFO L93 Difference]: Finished difference Result 52682 states and 175350 transitions. [2021-08-21 12:09:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:09:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:21,854 INFO L225 Difference]: With dead ends: 52682 [2021-08-21 12:09:21,854 INFO L226 Difference]: Without dead ends: 52682 [2021-08-21 12:09:21,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=640, Invalid=1252, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 12:09:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52682 states. [2021-08-21 12:09:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52682 to 47017. [2021-08-21 12:09:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47017 states, 47016 states have (on average 3.370831206397822) internal successors, (158483), 47016 states have internal predecessors, (158483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47017 states to 47017 states and 158483 transitions. [2021-08-21 12:09:23,168 INFO L78 Accepts]: Start accepts. Automaton has 47017 states and 158483 transitions. Word has length 22 [2021-08-21 12:09:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:23,168 INFO L470 AbstractCegarLoop]: Abstraction has 47017 states and 158483 transitions. [2021-08-21 12:09:23,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 47017 states and 158483 transitions. [2021-08-21 12:09:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:23,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:23,181 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:23,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:23,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 12:09:23,401 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash 31259192, now seen corresponding path program 208 times [2021-08-21 12:09:23,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:23,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106181275] [2021-08-21 12:09:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:23,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:23,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:23,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106181275] [2021-08-21 12:09:23,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106181275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:23,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457153166] [2021-08-21 12:09:23,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:23,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:23,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:23,506 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:23,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 12:09:25,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:25,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:25,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457153166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:25,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:25,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:25,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812496623] [2021-08-21 12:09:25,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:25,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:25,493 INFO L87 Difference]: Start difference. First operand 47017 states and 158483 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:25,986 INFO L93 Difference]: Finished difference Result 48872 states and 163310 transitions. [2021-08-21 12:09:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:09:25,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:25,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:26,213 INFO L225 Difference]: With dead ends: 48872 [2021-08-21 12:09:26,213 INFO L226 Difference]: Without dead ends: 48872 [2021-08-21 12:09:26,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=589, Invalid=1133, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:09:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48872 states. [2021-08-21 12:09:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48872 to 46706. [2021-08-21 12:09:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46706 states, 46705 states have (on average 3.3734075580772935) internal successors, (157555), 46705 states have internal predecessors, (157555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46706 states to 46706 states and 157555 transitions. [2021-08-21 12:09:27,274 INFO L78 Accepts]: Start accepts. Automaton has 46706 states and 157555 transitions. Word has length 22 [2021-08-21 12:09:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:27,274 INFO L470 AbstractCegarLoop]: Abstraction has 46706 states and 157555 transitions. [2021-08-21 12:09:27,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 46706 states and 157555 transitions. [2021-08-21 12:09:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:27,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:27,287 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:27,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:27,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-21 12:09:27,501 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash -393052044, now seen corresponding path program 209 times [2021-08-21 12:09:27,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:27,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358614346] [2021-08-21 12:09:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:27,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:27,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:27,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358614346] [2021-08-21 12:09:27,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358614346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:27,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753272039] [2021-08-21 12:09:27,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:27,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:27,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:27,764 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:27,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 12:09:29,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:09:29,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:29,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:29,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753272039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:29,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:29,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:29,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388934608] [2021-08-21 12:09:29,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:29,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:29,337 INFO L87 Difference]: Start difference. First operand 46706 states and 157555 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:29,965 INFO L93 Difference]: Finished difference Result 48717 states and 162772 transitions. [2021-08-21 12:09:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 12:09:29,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:30,088 INFO L225 Difference]: With dead ends: 48717 [2021-08-21 12:09:30,088 INFO L226 Difference]: Without dead ends: 48717 [2021-08-21 12:09:30,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=751, Invalid=1505, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:09:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48717 states. [2021-08-21 12:09:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48717 to 46732. [2021-08-21 12:09:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46732 states, 46731 states have (on average 3.3739059724807943) internal successors, (157666), 46731 states have internal predecessors, (157666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46732 states to 46732 states and 157666 transitions. [2021-08-21 12:09:31,451 INFO L78 Accepts]: Start accepts. Automaton has 46732 states and 157666 transitions. Word has length 22 [2021-08-21 12:09:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:31,451 INFO L470 AbstractCegarLoop]: Abstraction has 46732 states and 157666 transitions. [2021-08-21 12:09:31,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 46732 states and 157666 transitions. [2021-08-21 12:09:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:31,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:31,463 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:31,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:31,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 12:09:31,683 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash 290054516, now seen corresponding path program 210 times [2021-08-21 12:09:31,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:31,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321938889] [2021-08-21 12:09:31,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:31,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:31,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:31,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321938889] [2021-08-21 12:09:31,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321938889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:31,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063547395] [2021-08-21 12:09:31,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:31,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:31,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:31,784 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:31,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 12:09:33,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:09:33,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:33,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:33,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063547395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:33,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:33,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:33,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266879838] [2021-08-21 12:09:33,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:33,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:33,620 INFO L87 Difference]: Start difference. First operand 46732 states and 157666 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:34,169 INFO L93 Difference]: Finished difference Result 47443 states and 159160 transitions. [2021-08-21 12:09:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:09:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:34,293 INFO L225 Difference]: With dead ends: 47443 [2021-08-21 12:09:34,293 INFO L226 Difference]: Without dead ends: 47443 [2021-08-21 12:09:34,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=508, Invalid=974, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:09:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47443 states. [2021-08-21 12:09:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47443 to 46668. [2021-08-21 12:09:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46668 states, 46667 states have (on average 3.3746330383354404) internal successors, (157484), 46667 states have internal predecessors, (157484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46668 states to 46668 states and 157484 transitions. [2021-08-21 12:09:35,495 INFO L78 Accepts]: Start accepts. Automaton has 46668 states and 157484 transitions. Word has length 22 [2021-08-21 12:09:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:35,495 INFO L470 AbstractCegarLoop]: Abstraction has 46668 states and 157484 transitions. [2021-08-21 12:09:35,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:35,496 INFO L276 IsEmpty]: Start isEmpty. Operand 46668 states and 157484 transitions. [2021-08-21 12:09:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:35,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:35,508 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:35,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:35,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 12:09:35,727 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:35,727 INFO L82 PathProgramCache]: Analyzing trace with hash -134256720, now seen corresponding path program 211 times [2021-08-21 12:09:35,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:35,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336461688] [2021-08-21 12:09:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:35,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:35,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:35,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336461688] [2021-08-21 12:09:35,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336461688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:35,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616689796] [2021-08-21 12:09:35,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:35,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:35,832 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:35,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 12:09:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:37,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:37,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616689796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:37,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:37,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:37,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997547428] [2021-08-21 12:09:37,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:37,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:37,691 INFO L87 Difference]: Start difference. First operand 46668 states and 157484 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:38,183 INFO L93 Difference]: Finished difference Result 47364 states and 159029 transitions. [2021-08-21 12:09:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:09:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:38,303 INFO L225 Difference]: With dead ends: 47364 [2021-08-21 12:09:38,304 INFO L226 Difference]: Without dead ends: 47364 [2021-08-21 12:09:38,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=591, Invalid=1215, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:09:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47364 states. [2021-08-21 12:09:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47364 to 46605. [2021-08-21 12:09:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46605 states, 46604 states have (on average 3.375160930392241) internal successors, (157296), 46604 states have internal predecessors, (157296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46605 states to 46605 states and 157296 transitions. [2021-08-21 12:09:39,573 INFO L78 Accepts]: Start accepts. Automaton has 46605 states and 157296 transitions. Word has length 22 [2021-08-21 12:09:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:39,573 INFO L470 AbstractCegarLoop]: Abstraction has 46605 states and 157296 transitions. [2021-08-21 12:09:39,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 46605 states and 157296 transitions. [2021-08-21 12:09:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:39,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:39,587 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:39,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-21 12:09:39,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:39,808 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:39,808 INFO L82 PathProgramCache]: Analyzing trace with hash -403003148, now seen corresponding path program 212 times [2021-08-21 12:09:39,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:39,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146764726] [2021-08-21 12:09:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:39,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:39,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:39,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146764726] [2021-08-21 12:09:39,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146764726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:39,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877942193] [2021-08-21 12:09:39,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:39,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:39,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:39,918 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:39,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 12:09:41,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:41,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:41,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:41,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877942193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:41,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:41,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:41,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786425575] [2021-08-21 12:09:41,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:41,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:41,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:41,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:41,995 INFO L87 Difference]: Start difference. First operand 46605 states and 157296 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:42,558 INFO L93 Difference]: Finished difference Result 47915 states and 160630 transitions. [2021-08-21 12:09:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 12:09:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:42,679 INFO L225 Difference]: With dead ends: 47915 [2021-08-21 12:09:42,680 INFO L226 Difference]: Without dead ends: 47915 [2021-08-21 12:09:42,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=776, Invalid=1576, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:09:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47915 states. [2021-08-21 12:09:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47915 to 46585. [2021-08-21 12:09:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 46584 states have (on average 3.3753219989696035) internal successors, (157236), 46584 states have internal predecessors, (157236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 157236 transitions. [2021-08-21 12:09:43,787 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 157236 transitions. Word has length 22 [2021-08-21 12:09:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:43,787 INFO L470 AbstractCegarLoop]: Abstraction has 46585 states and 157236 transitions. [2021-08-21 12:09:43,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 157236 transitions. [2021-08-21 12:09:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:43,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:43,799 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:43,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:44,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-21 12:09:44,017 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash -277225032, now seen corresponding path program 213 times [2021-08-21 12:09:44,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:44,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461003591] [2021-08-21 12:09:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:44,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:44,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:44,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461003591] [2021-08-21 12:09:44,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461003591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:44,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198646301] [2021-08-21 12:09:44,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:44,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:44,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:44,115 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:44,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 12:09:45,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:09:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:46,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198646301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:46,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:46,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:46,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940204683] [2021-08-21 12:09:46,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:46,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:46,026 INFO L87 Difference]: Start difference. First operand 46585 states and 157236 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:46,431 INFO L93 Difference]: Finished difference Result 47000 states and 158039 transitions. [2021-08-21 12:09:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:46,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:46,550 INFO L225 Difference]: With dead ends: 47000 [2021-08-21 12:09:46,550 INFO L226 Difference]: Without dead ends: 47000 [2021-08-21 12:09:46,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=402, Invalid=788, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:09:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47000 states. [2021-08-21 12:09:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47000 to 46597. [2021-08-21 12:09:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46597 states, 46596 states have (on average 3.375225341231007) internal successors, (157272), 46596 states have internal predecessors, (157272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46597 states to 46597 states and 157272 transitions. [2021-08-21 12:09:47,576 INFO L78 Accepts]: Start accepts. Automaton has 46597 states and 157272 transitions. Word has length 22 [2021-08-21 12:09:47,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:47,576 INFO L470 AbstractCegarLoop]: Abstraction has 46597 states and 157272 transitions. [2021-08-21 12:09:47,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 46597 states and 157272 transitions. [2021-08-21 12:09:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:47,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:47,590 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:47,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:47,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:47,810 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:47,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:47,810 INFO L82 PathProgramCache]: Analyzing trace with hash -701536268, now seen corresponding path program 214 times [2021-08-21 12:09:47,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:47,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469022546] [2021-08-21 12:09:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:47,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:48,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:48,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469022546] [2021-08-21 12:09:48,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469022546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:48,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869709789] [2021-08-21 12:09:48,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:48,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:48,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:48,093 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:48,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 12:09:49,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:49,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:49,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:49,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869709789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:49,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:49,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:49,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412802637] [2021-08-21 12:09:49,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:49,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:49,815 INFO L87 Difference]: Start difference. First operand 46597 states and 157272 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:50,236 INFO L93 Difference]: Finished difference Result 46908 states and 157845 transitions. [2021-08-21 12:09:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:09:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:50,486 INFO L225 Difference]: With dead ends: 46908 [2021-08-21 12:09:50,486 INFO L226 Difference]: Without dead ends: 46908 [2021-08-21 12:09:50,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=403, Invalid=857, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 12:09:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46908 states. [2021-08-21 12:09:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46908 to 46553. [2021-08-21 12:09:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46553 states, 46552 states have (on average 3.3755799965629834) internal successors, (157140), 46552 states have internal predecessors, (157140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46553 states to 46553 states and 157140 transitions. [2021-08-21 12:09:51,539 INFO L78 Accepts]: Start accepts. Automaton has 46553 states and 157140 transitions. Word has length 22 [2021-08-21 12:09:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:51,540 INFO L470 AbstractCegarLoop]: Abstraction has 46553 states and 157140 transitions. [2021-08-21 12:09:51,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 46553 states and 157140 transitions. [2021-08-21 12:09:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:51,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:51,554 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:51,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:51,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:51,774 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash -970282696, now seen corresponding path program 215 times [2021-08-21 12:09:51,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:51,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418553362] [2021-08-21 12:09:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:51,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:52,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:52,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418553362] [2021-08-21 12:09:52,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418553362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:52,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782715505] [2021-08-21 12:09:52,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:52,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:52,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:52,061 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:52,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 12:09:53,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:09:53,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:53,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:53,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782715505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:53,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:53,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:53,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917258813] [2021-08-21 12:09:53,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:53,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:53,854 INFO L87 Difference]: Start difference. First operand 46553 states and 157140 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:54,489 INFO L93 Difference]: Finished difference Result 47013 states and 158092 transitions. [2021-08-21 12:09:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:09:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:54,600 INFO L225 Difference]: With dead ends: 47013 [2021-08-21 12:09:54,600 INFO L226 Difference]: Without dead ends: 47013 [2021-08-21 12:09:54,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=590, Invalid=1216, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:09:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47013 states. [2021-08-21 12:09:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47013 to 46548. [2021-08-21 12:09:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46548 states, 46547 states have (on average 3.3756203407308742) internal successors, (157125), 46547 states have internal predecessors, (157125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46548 states to 46548 states and 157125 transitions. [2021-08-21 12:09:55,804 INFO L78 Accepts]: Start accepts. Automaton has 46548 states and 157125 transitions. Word has length 22 [2021-08-21 12:09:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:55,804 INFO L470 AbstractCegarLoop]: Abstraction has 46548 states and 157125 transitions. [2021-08-21 12:09:55,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 46548 states and 157125 transitions. [2021-08-21 12:09:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:55,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:55,834 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:55,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:56,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-08-21 12:09:56,035 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash -711487372, now seen corresponding path program 216 times [2021-08-21 12:09:56,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:56,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245984961] [2021-08-21 12:09:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:56,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:56,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:56,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245984961] [2021-08-21 12:09:56,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245984961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:56,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938833826] [2021-08-21 12:09:56,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:56,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:56,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:56,153 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:56,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 12:09:57,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:09:57,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:09:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:09:57,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938833826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:57,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:57,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:09:57,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957228861] [2021-08-21 12:09:57,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:09:57,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:57,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:09:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:57,924 INFO L87 Difference]: Start difference. First operand 46548 states and 157125 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:58,505 INFO L93 Difference]: Finished difference Result 47288 states and 158903 transitions. [2021-08-21 12:09:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 12:09:58,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:09:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:58,629 INFO L225 Difference]: With dead ends: 47288 [2021-08-21 12:09:58,629 INFO L226 Difference]: Without dead ends: 47288 [2021-08-21 12:09:58,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=717, Invalid=1445, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 12:09:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47288 states. [2021-08-21 12:09:59,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47288 to 46545. [2021-08-21 12:09:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46545 states, 46544 states have (on average 3.375644551392231) internal successors, (157116), 46544 states have internal predecessors, (157116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46545 states to 46545 states and 157116 transitions. [2021-08-21 12:09:59,796 INFO L78 Accepts]: Start accepts. Automaton has 46545 states and 157116 transitions. Word has length 22 [2021-08-21 12:09:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:59,796 INFO L470 AbstractCegarLoop]: Abstraction has 46545 states and 157116 transitions. [2021-08-21 12:09:59,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 46545 states and 157116 transitions. [2021-08-21 12:09:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:09:59,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:59,810 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:59,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:00,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:00,031 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:00,032 INFO L82 PathProgramCache]: Analyzing trace with hash -759303900, now seen corresponding path program 217 times [2021-08-21 12:10:00,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:00,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700909453] [2021-08-21 12:10:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:00,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:00,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:00,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700909453] [2021-08-21 12:10:00,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700909453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:00,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757781946] [2021-08-21 12:10:00,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:10:00,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:00,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:00,135 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:00,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 12:10:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:02,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757781946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:02,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:02,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:10:02,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143486616] [2021-08-21 12:10:02,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:10:02,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:10:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:10:02,092 INFO L87 Difference]: Start difference. First operand 46545 states and 157116 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:02,611 INFO L93 Difference]: Finished difference Result 51883 states and 174173 transitions. [2021-08-21 12:10:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:10:02,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:02,780 INFO L225 Difference]: With dead ends: 51883 [2021-08-21 12:10:02,780 INFO L226 Difference]: Without dead ends: 51881 [2021-08-21 12:10:02,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:10:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51881 states. [2021-08-21 12:10:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51881 to 51635. [2021-08-21 12:10:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51635 states, 51634 states have (on average 3.3678583878839525) internal successors, (173896), 51634 states have internal predecessors, (173896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51635 states to 51635 states and 173896 transitions. [2021-08-21 12:10:04,389 INFO L78 Accepts]: Start accepts. Automaton has 51635 states and 173896 transitions. Word has length 22 [2021-08-21 12:10:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:04,389 INFO L470 AbstractCegarLoop]: Abstraction has 51635 states and 173896 transitions. [2021-08-21 12:10:04,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 51635 states and 173896 transitions. [2021-08-21 12:10:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:04,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:04,404 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:04,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:04,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:04,625 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:04,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1678791540, now seen corresponding path program 218 times [2021-08-21 12:10:04,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:04,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310718442] [2021-08-21 12:10:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:04,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:04,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:04,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310718442] [2021-08-21 12:10:04,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310718442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:04,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170514662] [2021-08-21 12:10:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:10:04,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:04,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:04,703 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:04,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 12:10:06,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:10:06,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:06,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:06,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170514662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:06,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:06,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:10:06,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846098352] [2021-08-21 12:10:06,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:10:06,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:10:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:10:06,898 INFO L87 Difference]: Start difference. First operand 51635 states and 173896 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:07,283 INFO L93 Difference]: Finished difference Result 52235 states and 175193 transitions. [2021-08-21 12:10:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:10:07,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:07,464 INFO L225 Difference]: With dead ends: 52235 [2021-08-21 12:10:07,465 INFO L226 Difference]: Without dead ends: 52235 [2021-08-21 12:10:07,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=167, Invalid=253, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:10:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52235 states. [2021-08-21 12:10:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52235 to 51636. [2021-08-21 12:10:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51636 states, 51635 states have (on average 3.3678125302604824) internal successors, (173897), 51635 states have internal predecessors, (173897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51636 states to 51636 states and 173897 transitions. [2021-08-21 12:10:09,042 INFO L78 Accepts]: Start accepts. Automaton has 51636 states and 173897 transitions. Word has length 22 [2021-08-21 12:10:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:09,042 INFO L470 AbstractCegarLoop]: Abstraction has 51636 states and 173897 transitions. [2021-08-21 12:10:09,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 51636 states and 173897 transitions. [2021-08-21 12:10:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:09,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:09,060 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:09,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:09,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-21 12:10:09,285 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash -905562448, now seen corresponding path program 219 times [2021-08-21 12:10:09,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:09,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373317047] [2021-08-21 12:10:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:09,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:09,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:09,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373317047] [2021-08-21 12:10:09,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373317047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:09,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771770275] [2021-08-21 12:10:09,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:10:09,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:09,768 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:09,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 12:10:11,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:10:11,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:11,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771770275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:11,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:11,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:10:11,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314243026] [2021-08-21 12:10:11,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:10:11,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:10:11,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:10:11,732 INFO L87 Difference]: Start difference. First operand 51636 states and 173897 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:12,125 INFO L93 Difference]: Finished difference Result 52594 states and 176206 transitions. [2021-08-21 12:10:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:10:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:12,372 INFO L225 Difference]: With dead ends: 52594 [2021-08-21 12:10:12,372 INFO L226 Difference]: Without dead ends: 52594 [2021-08-21 12:10:12,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 540.9ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:10:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52594 states. [2021-08-21 12:10:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52594 to 51660. [2021-08-21 12:10:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51660 states, 51659 states have (on average 3.3676029346290095) internal successors, (173967), 51659 states have internal predecessors, (173967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51660 states to 51660 states and 173967 transitions. [2021-08-21 12:10:13,867 INFO L78 Accepts]: Start accepts. Automaton has 51660 states and 173967 transitions. Word has length 22 [2021-08-21 12:10:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:13,868 INFO L470 AbstractCegarLoop]: Abstraction has 51660 states and 173967 transitions. [2021-08-21 12:10:13,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 51660 states and 173967 transitions. [2021-08-21 12:10:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:13,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:13,883 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:13,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:14,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 12:10:14,101 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 583842548, now seen corresponding path program 220 times [2021-08-21 12:10:14,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:14,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735070670] [2021-08-21 12:10:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:14,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:14,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:14,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735070670] [2021-08-21 12:10:14,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735070670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:14,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405263587] [2021-08-21 12:10:14,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:10:14,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:14,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:14,189 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:14,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 12:10:16,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:10:16,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:16,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405263587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:16,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:16,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:10:16,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538744982] [2021-08-21 12:10:16,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:10:16,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:16,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:10:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:10:16,154 INFO L87 Difference]: Start difference. First operand 51660 states and 173967 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:16,654 INFO L93 Difference]: Finished difference Result 56920 states and 190512 transitions. [2021-08-21 12:10:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:10:16,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:16,828 INFO L225 Difference]: With dead ends: 56920 [2021-08-21 12:10:16,828 INFO L226 Difference]: Without dead ends: 56920 [2021-08-21 12:10:16,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:10:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56920 states. [2021-08-21 12:10:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56920 to 55072. [2021-08-21 12:10:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55072 states, 55071 states have (on average 3.366345263387264) internal successors, (185388), 55071 states have internal predecessors, (185388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55072 states to 55072 states and 185388 transitions. [2021-08-21 12:10:18,534 INFO L78 Accepts]: Start accepts. Automaton has 55072 states and 185388 transitions. Word has length 22 [2021-08-21 12:10:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:18,534 INFO L470 AbstractCegarLoop]: Abstraction has 55072 states and 185388 transitions. [2021-08-21 12:10:18,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 55072 states and 185388 transitions. [2021-08-21 12:10:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:18,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:18,550 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:18,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-21 12:10:18,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 12:10:18,775 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash -489242832, now seen corresponding path program 221 times [2021-08-21 12:10:18,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:18,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603869503] [2021-08-21 12:10:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:18,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:18,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:18,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603869503] [2021-08-21 12:10:18,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603869503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:18,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431221564] [2021-08-21 12:10:18,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:10:18,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:18,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:18,861 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:18,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 12:10:21,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:10:21,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:21,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:21,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431221564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:21,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:21,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:10:21,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396202084] [2021-08-21 12:10:21,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:10:21,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:10:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:10:21,088 INFO L87 Difference]: Start difference. First operand 55072 states and 185388 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:21,521 INFO L93 Difference]: Finished difference Result 59247 states and 197975 transitions. [2021-08-21 12:10:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:10:21,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:21,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:21,907 INFO L225 Difference]: With dead ends: 59247 [2021-08-21 12:10:21,908 INFO L226 Difference]: Without dead ends: 59247 [2021-08-21 12:10:21,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:10:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59247 states. [2021-08-21 12:10:23,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59247 to 57124. [2021-08-21 12:10:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57124 states, 57123 states have (on average 3.360065122630114) internal successors, (191937), 57123 states have internal predecessors, (191937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57124 states to 57124 states and 191937 transitions. [2021-08-21 12:10:23,576 INFO L78 Accepts]: Start accepts. Automaton has 57124 states and 191937 transitions. Word has length 22 [2021-08-21 12:10:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:23,576 INFO L470 AbstractCegarLoop]: Abstraction has 57124 states and 191937 transitions. [2021-08-21 12:10:23,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 57124 states and 191937 transitions. [2021-08-21 12:10:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:23,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:23,591 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:23,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:23,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-21 12:10:23,812 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash 604848756, now seen corresponding path program 222 times [2021-08-21 12:10:23,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:23,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112811665] [2021-08-21 12:10:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:23,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:23,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:23,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112811665] [2021-08-21 12:10:23,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112811665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:23,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938044406] [2021-08-21 12:10:23,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:10:23,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:23,900 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:23,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 12:10:26,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:10:26,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:26,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:26,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938044406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:26,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:26,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:10:26,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046725269] [2021-08-21 12:10:26,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:10:26,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:26,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:10:26,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:10:26,061 INFO L87 Difference]: Start difference. First operand 57124 states and 191937 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:26,534 INFO L93 Difference]: Finished difference Result 58648 states and 196175 transitions. [2021-08-21 12:10:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:10:26,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:26,755 INFO L225 Difference]: With dead ends: 58648 [2021-08-21 12:10:26,755 INFO L226 Difference]: Without dead ends: 58648 [2021-08-21 12:10:26,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:10:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58648 states. [2021-08-21 12:10:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58648 to 58197. [2021-08-21 12:10:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58197 states, 58196 states have (on average 3.3551618667949685) internal successors, (195257), 58196 states have internal predecessors, (195257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58197 states to 58197 states and 195257 transitions. [2021-08-21 12:10:28,651 INFO L78 Accepts]: Start accepts. Automaton has 58197 states and 195257 transitions. Word has length 22 [2021-08-21 12:10:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:28,651 INFO L470 AbstractCegarLoop]: Abstraction has 58197 states and 195257 transitions. [2021-08-21 12:10:28,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 58197 states and 195257 transitions. [2021-08-21 12:10:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:28,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:28,669 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:28,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:28,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-21 12:10:28,896 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash 161949616, now seen corresponding path program 223 times [2021-08-21 12:10:28,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:28,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527643234] [2021-08-21 12:10:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:28,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:28,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:28,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527643234] [2021-08-21 12:10:28,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527643234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:28,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942553910] [2021-08-21 12:10:28,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:10:28,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:28,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:28,990 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:28,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 12:10:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:10:31,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942553910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:31,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:31,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 12:10:31,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793857180] [2021-08-21 12:10:31,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:10:31,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:31,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:10:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:10:31,085 INFO L87 Difference]: Start difference. First operand 58197 states and 195257 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:31,565 INFO L93 Difference]: Finished difference Result 58496 states and 195930 transitions. [2021-08-21 12:10:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:10:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:31,751 INFO L225 Difference]: With dead ends: 58496 [2021-08-21 12:10:31,751 INFO L226 Difference]: Without dead ends: 58496 [2021-08-21 12:10:31,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:10:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58496 states. [2021-08-21 12:10:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58496 to 58361. [2021-08-21 12:10:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58361 states, 58360 states have (on average 3.3543522960932144) internal successors, (195760), 58360 states have internal predecessors, (195760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58361 states to 58361 states and 195760 transitions. [2021-08-21 12:10:33,494 INFO L78 Accepts]: Start accepts. Automaton has 58361 states and 195760 transitions. Word has length 22 [2021-08-21 12:10:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:33,494 INFO L470 AbstractCegarLoop]: Abstraction has 58361 states and 195760 transitions. [2021-08-21 12:10:33,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 58361 states and 195760 transitions. [2021-08-21 12:10:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:33,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:33,510 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:33,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:33,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:33,730 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:33,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash -683021836, now seen corresponding path program 224 times [2021-08-21 12:10:33,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:33,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359265065] [2021-08-21 12:10:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:33,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:34,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:34,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359265065] [2021-08-21 12:10:34,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359265065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:34,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161572452] [2021-08-21 12:10:34,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:10:34,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:34,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:34,266 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:34,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 12:10:36,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:10:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:36,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:36,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161572452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:36,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:36,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:10:36,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422263012] [2021-08-21 12:10:36,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:36,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:36,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:36,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:36,284 INFO L87 Difference]: Start difference. First operand 58361 states and 195760 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:36,895 INFO L93 Difference]: Finished difference Result 58529 states and 195995 transitions. [2021-08-21 12:10:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:10:36,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:37,052 INFO L225 Difference]: With dead ends: 58529 [2021-08-21 12:10:37,053 INFO L226 Difference]: Without dead ends: 58529 [2021-08-21 12:10:37,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:10:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58529 states. [2021-08-21 12:10:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58529 to 58337. [2021-08-21 12:10:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58337 states, 58336 states have (on average 3.3544809380142624) internal successors, (195687), 58336 states have internal predecessors, (195687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:38,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58337 states to 58337 states and 195687 transitions. [2021-08-21 12:10:38,762 INFO L78 Accepts]: Start accepts. Automaton has 58337 states and 195687 transitions. Word has length 22 [2021-08-21 12:10:38,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:38,763 INFO L470 AbstractCegarLoop]: Abstraction has 58337 states and 195687 transitions. [2021-08-21 12:10:38,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 58337 states and 195687 transitions. [2021-08-21 12:10:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:38,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:38,779 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:38,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:39,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:39,000 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1107333072, now seen corresponding path program 225 times [2021-08-21 12:10:39,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:39,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932812114] [2021-08-21 12:10:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:39,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:39,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:39,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932812114] [2021-08-21 12:10:39,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932812114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:39,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192539713] [2021-08-21 12:10:39,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:10:39,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:39,086 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:39,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 12:10:41,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:10:41,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:41,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:41,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192539713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:41,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:41,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:10:41,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875682640] [2021-08-21 12:10:41,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:41,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:41,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:41,480 INFO L87 Difference]: Start difference. First operand 58337 states and 195687 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:41,999 INFO L93 Difference]: Finished difference Result 58540 states and 196035 transitions. [2021-08-21 12:10:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:10:42,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:42,408 INFO L225 Difference]: With dead ends: 58540 [2021-08-21 12:10:42,408 INFO L226 Difference]: Without dead ends: 58540 [2021-08-21 12:10:42,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:10:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58540 states. [2021-08-21 12:10:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58540 to 58340. [2021-08-21 12:10:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58340 states, 58339 states have (on average 3.3544455681448087) internal successors, (195695), 58339 states have internal predecessors, (195695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58340 states to 58340 states and 195695 transitions. [2021-08-21 12:10:44,042 INFO L78 Accepts]: Start accepts. Automaton has 58340 states and 195695 transitions. Word has length 22 [2021-08-21 12:10:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:44,042 INFO L470 AbstractCegarLoop]: Abstraction has 58340 states and 195695 transitions. [2021-08-21 12:10:44,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 58340 states and 195695 transitions. [2021-08-21 12:10:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:44,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:44,060 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:44,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:44,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 12:10:44,273 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:44,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:44,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1376079500, now seen corresponding path program 226 times [2021-08-21 12:10:44,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:44,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37458281] [2021-08-21 12:10:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:44,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:44,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:44,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37458281] [2021-08-21 12:10:44,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37458281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:44,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059319483] [2021-08-21 12:10:44,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:10:44,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:44,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:44,403 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:44,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 12:10:46,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:10:46,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:46,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:46,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:46,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059319483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:46,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:46,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:10:46,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143112979] [2021-08-21 12:10:46,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:46,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:46,464 INFO L87 Difference]: Start difference. First operand 58340 states and 195695 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:46,961 INFO L93 Difference]: Finished difference Result 58647 states and 196315 transitions. [2021-08-21 12:10:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:10:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:47,157 INFO L225 Difference]: With dead ends: 58647 [2021-08-21 12:10:47,157 INFO L226 Difference]: Without dead ends: 58647 [2021-08-21 12:10:47,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:10:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58647 states. [2021-08-21 12:10:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58647 to 58343. [2021-08-21 12:10:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58343 states, 58342 states have (on average 3.3544102019128585) internal successors, (195703), 58342 states have internal predecessors, (195703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58343 states to 58343 states and 195703 transitions. [2021-08-21 12:10:49,260 INFO L78 Accepts]: Start accepts. Automaton has 58343 states and 195703 transitions. Word has length 22 [2021-08-21 12:10:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:49,260 INFO L470 AbstractCegarLoop]: Abstraction has 58343 states and 195703 transitions. [2021-08-21 12:10:49,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 58343 states and 195703 transitions. [2021-08-21 12:10:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:49,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:49,281 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:49,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:49,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:49,501 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1117284176, now seen corresponding path program 227 times [2021-08-21 12:10:49,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:49,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270856792] [2021-08-21 12:10:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:49,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:49,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:49,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270856792] [2021-08-21 12:10:49,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270856792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:49,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74591232] [2021-08-21 12:10:49,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:10:49,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:49,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:49,614 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:49,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 12:10:51,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:10:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:51,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74591232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:51,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:51,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:10:51,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611888313] [2021-08-21 12:10:51,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:51,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:51,556 INFO L87 Difference]: Start difference. First operand 58343 states and 195703 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:52,190 INFO L93 Difference]: Finished difference Result 58907 states and 197056 transitions. [2021-08-21 12:10:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:10:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:52,394 INFO L225 Difference]: With dead ends: 58907 [2021-08-21 12:10:52,395 INFO L226 Difference]: Without dead ends: 58907 [2021-08-21 12:10:52,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:10:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58907 states. [2021-08-21 12:10:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58907 to 58347. [2021-08-21 12:10:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58347 states, 58346 states have (on average 3.354368765639461) internal successors, (195714), 58346 states have internal predecessors, (195714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58347 states to 58347 states and 195714 transitions. [2021-08-21 12:10:54,314 INFO L78 Accepts]: Start accepts. Automaton has 58347 states and 195714 transitions. Word has length 22 [2021-08-21 12:10:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:54,314 INFO L470 AbstractCegarLoop]: Abstraction has 58347 states and 195714 transitions. [2021-08-21 12:10:54,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 58347 states and 195714 transitions. [2021-08-21 12:10:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:10:54,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:54,329 INFO L512 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:54,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:54,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:54,550 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:54,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1684563724, now seen corresponding path program 228 times [2021-08-21 12:10:54,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:54,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268452100] [2021-08-21 12:10:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:54,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:54,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:54,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268452100] [2021-08-21 12:10:54,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268452100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:54,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242787031] [2021-08-21 12:10:54,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:10:54,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:54,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:54,670 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:54,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 12:10:56,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:10:56,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:10:56,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:10:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:10:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:56,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242787031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:56,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:10:56,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 12:10:56,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326565274] [2021-08-21 12:10:56,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:10:56,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:10:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:10:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:10:56,609 INFO L87 Difference]: Start difference. First operand 58347 states and 195714 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:10:57,280 INFO L93 Difference]: Finished difference Result 59261 states and 198117 transitions. [2021-08-21 12:10:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 12:10:57,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:10:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:10:57,492 INFO L225 Difference]: With dead ends: 59261 [2021-08-21 12:10:57,493 INFO L226 Difference]: Without dead ends: 59261 [2021-08-21 12:10:57,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=586, Invalid=1136, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:10:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59261 states. [2021-08-21 12:10:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59261 to 58344. [2021-08-21 12:10:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58344 states, 58343 states have (on average 3.3547126476183946) internal successors, (195724), 58343 states have internal predecessors, (195724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58344 states to 58344 states and 195724 transitions. [2021-08-21 12:10:59,533 INFO L78 Accepts]: Start accepts. Automaton has 58344 states and 195724 transitions. Word has length 22 [2021-08-21 12:10:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:10:59,533 INFO L470 AbstractCegarLoop]: Abstraction has 58344 states and 195724 transitions. [2021-08-21 12:10:59,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:10:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 58344 states and 195724 transitions. [2021-08-21 12:10:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:10:59,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:10:59,549 INFO L512 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:10:59,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2021-08-21 12:10:59,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:59,770 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:10:59,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:10:59,771 INFO L82 PathProgramCache]: Analyzing trace with hash 354022471, now seen corresponding path program 229 times [2021-08-21 12:10:59,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:10:59,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118921310] [2021-08-21 12:10:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:10:59,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:10:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:10:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:10:59,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:10:59,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118921310] [2021-08-21 12:10:59,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118921310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:10:59,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314519918] [2021-08-21 12:10:59,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:10:59,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:10:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:10:59,863 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:10:59,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 12:11:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:01,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:01,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:01,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314519918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:01,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:01,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-08-21 12:11:01,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253117373] [2021-08-21 12:11:01,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:11:01,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:01,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:11:01,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:11:01,748 INFO L87 Difference]: Start difference. First operand 58344 states and 195724 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:02,295 INFO L93 Difference]: Finished difference Result 58545 states and 196006 transitions. [2021-08-21 12:11:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:11:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:02,492 INFO L225 Difference]: With dead ends: 58545 [2021-08-21 12:11:02,492 INFO L226 Difference]: Without dead ends: 58542 [2021-08-21 12:11:02,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:11:02,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58542 states. [2021-08-21 12:11:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58542 to 58338. [2021-08-21 12:11:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58338 states, 58337 states have (on average 3.3514579083600458) internal successors, (195514), 58337 states have internal predecessors, (195514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58338 states to 58338 states and 195514 transitions. [2021-08-21 12:11:04,248 INFO L78 Accepts]: Start accepts. Automaton has 58338 states and 195514 transitions. Word has length 23 [2021-08-21 12:11:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:04,248 INFO L470 AbstractCegarLoop]: Abstraction has 58338 states and 195514 transitions. [2021-08-21 12:11:04,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 58338 states and 195514 transitions. [2021-08-21 12:11:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:04,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:04,263 INFO L512 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:04,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2021-08-21 12:11:04,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 12:11:04,485 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1098724969, now seen corresponding path program 230 times [2021-08-21 12:11:04,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:04,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44667931] [2021-08-21 12:11:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:04,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:04,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:04,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44667931] [2021-08-21 12:11:04,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44667931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:04,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277563551] [2021-08-21 12:11:04,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:11:04,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:04,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:04,897 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:04,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 12:11:06,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:11:06,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:06,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:06,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:06,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277563551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:06,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:06,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-08-21 12:11:06,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412885012] [2021-08-21 12:11:06,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:11:06,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:06,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:11:06,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:11:06,896 INFO L87 Difference]: Start difference. First operand 58338 states and 195514 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:07,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:07,537 INFO L93 Difference]: Finished difference Result 58541 states and 195801 transitions. [2021-08-21 12:11:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:11:07,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:11:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:07,746 INFO L225 Difference]: With dead ends: 58541 [2021-08-21 12:11:07,746 INFO L226 Difference]: Without dead ends: 58538 [2021-08-21 12:11:07,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:11:07,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58538 states. [2021-08-21 12:11:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58538 to 58338. [2021-08-21 12:11:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58338 states, 58337 states have (on average 3.3513207741227693) internal successors, (195506), 58337 states have internal predecessors, (195506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58338 states to 58338 states and 195506 transitions. [2021-08-21 12:11:09,422 INFO L78 Accepts]: Start accepts. Automaton has 58338 states and 195506 transitions. Word has length 23 [2021-08-21 12:11:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:09,422 INFO L470 AbstractCegarLoop]: Abstraction has 58338 states and 195506 transitions. [2021-08-21 12:11:09,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 58338 states and 195506 transitions. [2021-08-21 12:11:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:11:09,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:09,438 INFO L512 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:09,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2021-08-21 12:11:09,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 12:11:09,653 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:09,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1585301369, now seen corresponding path program 231 times [2021-08-21 12:11:09,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:09,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427150604] [2021-08-21 12:11:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:09,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:09,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:09,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427150604] [2021-08-21 12:11:09,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427150604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:09,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156353998] [2021-08-21 12:11:09,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:11:09,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:09,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:09,748 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:09,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 12:11:11,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:11:11,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 12:11:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:12,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156353998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:12,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:12,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-08-21 12:11:12,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070805533] [2021-08-21 12:11:12,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 12:11:12,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:12,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 12:11:12,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:11:12,108 INFO L87 Difference]: Start difference. First operand 58338 states and 195506 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:13,511 INFO L93 Difference]: Finished difference Result 67592 states and 222742 transitions. [2021-08-21 12:11:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-21 12:11:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 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 23 [2021-08-21 12:11:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:13,715 INFO L225 Difference]: With dead ends: 67592 [2021-08-21 12:11:13,716 INFO L226 Difference]: Without dead ends: 67586 [2021-08-21 12:11:13,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 899.8ms TimeCoverageRelationStatistics Valid=1023, Invalid=10319, Unknown=0, NotChecked=0, Total=11342 [2021-08-21 12:11:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67586 states. [2021-08-21 12:11:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67586 to 59060. [2021-08-21 12:11:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59060 states, 59059 states have (on average 3.3446045479943787) internal successors, (197529), 59059 states have internal predecessors, (197529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59060 states to 59060 states and 197529 transitions. [2021-08-21 12:11:15,556 INFO L78 Accepts]: Start accepts. Automaton has 59060 states and 197529 transitions. Word has length 23 [2021-08-21 12:11:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:15,556 INFO L470 AbstractCegarLoop]: Abstraction has 59060 states and 197529 transitions. [2021-08-21 12:11:15,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 59060 states and 197529 transitions. [2021-08-21 12:11:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:15,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:15,578 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:15,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:15,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-21 12:11:15,800 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:15,800 INFO L82 PathProgramCache]: Analyzing trace with hash 47553986, now seen corresponding path program 232 times [2021-08-21 12:11:15,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:15,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650085892] [2021-08-21 12:11:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:15,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:15,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:15,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650085892] [2021-08-21 12:11:15,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650085892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:15,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275744551] [2021-08-21 12:11:15,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:11:15,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:15,936 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:15,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 12:11:18,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:11:18,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:18,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:11:18,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275744551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:18,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:18,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-08-21 12:11:18,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807237289] [2021-08-21 12:11:18,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:18,258 INFO L87 Difference]: Start difference. First operand 59060 states and 197529 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:18,799 INFO L93 Difference]: Finished difference Result 59371 states and 198257 transitions. [2021-08-21 12:11:18,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:11:18,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:19,210 INFO L225 Difference]: With dead ends: 59371 [2021-08-21 12:11:19,210 INFO L226 Difference]: Without dead ends: 59362 [2021-08-21 12:11:19,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=267, Invalid=603, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:11:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59362 states. [2021-08-21 12:11:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59362 to 59062. [2021-08-21 12:11:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59062 states, 59061 states have (on average 3.34450822031459) internal successors, (197530), 59061 states have internal predecessors, (197530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59062 states to 59062 states and 197530 transitions. [2021-08-21 12:11:20,901 INFO L78 Accepts]: Start accepts. Automaton has 59062 states and 197530 transitions. Word has length 24 [2021-08-21 12:11:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:20,902 INFO L470 AbstractCegarLoop]: Abstraction has 59062 states and 197530 transitions. [2021-08-21 12:11:20,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 59062 states and 197530 transitions. [2021-08-21 12:11:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:20,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:20,924 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:20,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2021-08-21 12:11:21,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-21 12:11:21,137 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:21,137 INFO L82 PathProgramCache]: Analyzing trace with hash -374931740, now seen corresponding path program 233 times [2021-08-21 12:11:21,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:21,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664212169] [2021-08-21 12:11:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:21,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 44 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:21,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:21,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664212169] [2021-08-21 12:11:21,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664212169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:21,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179123970] [2021-08-21 12:11:21,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:11:21,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:21,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:21,253 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:21,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 12:11:23,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:11:23,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:23,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:23,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 58 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:11:23,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179123970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:23,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:23,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-08-21 12:11:23,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416877674] [2021-08-21 12:11:23,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:23,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:23,466 INFO L87 Difference]: Start difference. First operand 59062 states and 197530 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:23,951 INFO L93 Difference]: Finished difference Result 59337 states and 198211 transitions. [2021-08-21 12:11:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:11:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:24,148 INFO L225 Difference]: With dead ends: 59337 [2021-08-21 12:11:24,148 INFO L226 Difference]: Without dead ends: 59331 [2021-08-21 12:11:24,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:11:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59331 states. [2021-08-21 12:11:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59331 to 59064. [2021-08-21 12:11:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59064 states, 59063 states have (on average 3.3444118991585254) internal successors, (197531), 59063 states have internal predecessors, (197531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59064 states to 59064 states and 197531 transitions. [2021-08-21 12:11:26,032 INFO L78 Accepts]: Start accepts. Automaton has 59064 states and 197531 transitions. Word has length 24 [2021-08-21 12:11:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:26,033 INFO L470 AbstractCegarLoop]: Abstraction has 59064 states and 197531 transitions. [2021-08-21 12:11:26,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 59064 states and 197531 transitions. [2021-08-21 12:11:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:26,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:26,055 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:26,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:26,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:26,258 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:26,258 INFO L82 PathProgramCache]: Analyzing trace with hash -112899566, now seen corresponding path program 234 times [2021-08-21 12:11:26,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:26,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403720999] [2021-08-21 12:11:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:26,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:11:26,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:26,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403720999] [2021-08-21 12:11:26,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403720999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:26,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045749729] [2021-08-21 12:11:26,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:11:26,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:26,345 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:26,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 12:11:28,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:11:28,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:28,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:11:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:11:28,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045749729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:28,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:28,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:11:28,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463279919] [2021-08-21 12:11:28,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:11:28,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:11:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:11:28,532 INFO L87 Difference]: Start difference. First operand 59064 states and 197531 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:28,898 INFO L93 Difference]: Finished difference Result 59318 states and 197879 transitions. [2021-08-21 12:11:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:11:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:29,102 INFO L225 Difference]: With dead ends: 59318 [2021-08-21 12:11:29,103 INFO L226 Difference]: Without dead ends: 59316 [2021-08-21 12:11:29,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=130, Invalid=176, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59316 states. [2021-08-21 12:11:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59316 to 59031. [2021-08-21 12:11:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59031 states, 59030 states have (on average 3.3435033034050483) internal successors, (197367), 59030 states have internal predecessors, (197367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59031 states to 59031 states and 197367 transitions. [2021-08-21 12:11:31,127 INFO L78 Accepts]: Start accepts. Automaton has 59031 states and 197367 transitions. Word has length 24 [2021-08-21 12:11:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:31,128 INFO L470 AbstractCegarLoop]: Abstraction has 59031 states and 197367 transitions. [2021-08-21 12:11:31,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 59031 states and 197367 transitions. [2021-08-21 12:11:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:31,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:31,149 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:31,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:31,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 12:11:31,363 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:31,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:31,363 INFO L82 PathProgramCache]: Analyzing trace with hash 796023844, now seen corresponding path program 235 times [2021-08-21 12:11:31,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:31,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754608661] [2021-08-21 12:11:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:31,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:31,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:31,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754608661] [2021-08-21 12:11:31,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754608661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:31,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668239078] [2021-08-21 12:11:31,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:11:31,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:31,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:31,447 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:31,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 12:11:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:11:33,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 56 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:11:33,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668239078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:33,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:33,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-08-21 12:11:33,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536607786] [2021-08-21 12:11:33,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:11:33,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:33,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:11:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:11:33,422 INFO L87 Difference]: Start difference. First operand 59031 states and 197367 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:33,743 INFO L93 Difference]: Finished difference Result 59256 states and 197583 transitions. [2021-08-21 12:11:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:11:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:33,904 INFO L225 Difference]: With dead ends: 59256 [2021-08-21 12:11:33,904 INFO L226 Difference]: Without dead ends: 59256 [2021-08-21 12:11:33,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:11:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59256 states. [2021-08-21 12:11:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59256 to 59011. [2021-08-21 12:11:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59011 states, 59010 states have (on average 3.3416370106761564) internal successors, (197190), 59010 states have internal predecessors, (197190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59011 states to 59011 states and 197190 transitions. [2021-08-21 12:11:36,059 INFO L78 Accepts]: Start accepts. Automaton has 59011 states and 197190 transitions. Word has length 24 [2021-08-21 12:11:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:36,059 INFO L470 AbstractCegarLoop]: Abstraction has 59011 states and 197190 transitions. [2021-08-21 12:11:36,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 59011 states and 197190 transitions. [2021-08-21 12:11:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:36,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:36,085 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:36,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:36,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-21 12:11:36,301 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1651330498, now seen corresponding path program 236 times [2021-08-21 12:11:36,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:36,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68367383] [2021-08-21 12:11:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:36,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:36,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:36,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68367383] [2021-08-21 12:11:36,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68367383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:36,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072848228] [2021-08-21 12:11:36,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:11:36,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:36,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:36,398 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:36,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 12:11:38,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:11:38,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:38,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 58 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:11:38,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072848228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:38,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:38,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-08-21 12:11:38,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987850367] [2021-08-21 12:11:38,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:11:38,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:38,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:11:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:11:38,370 INFO L87 Difference]: Start difference. First operand 59011 states and 197190 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:38,917 INFO L93 Difference]: Finished difference Result 59230 states and 197302 transitions. [2021-08-21 12:11:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:11:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:39,113 INFO L225 Difference]: With dead ends: 59230 [2021-08-21 12:11:39,113 INFO L226 Difference]: Without dead ends: 59230 [2021-08-21 12:11:39,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:11:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59230 states. [2021-08-21 12:11:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59230 to 59003. [2021-08-21 12:11:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59003 states, 59002 states have (on average 3.3382766685875054) internal successors, (196965), 59002 states have internal predecessors, (196965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59003 states to 59003 states and 196965 transitions. [2021-08-21 12:11:40,822 INFO L78 Accepts]: Start accepts. Automaton has 59003 states and 196965 transitions. Word has length 24 [2021-08-21 12:11:40,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:40,822 INFO L470 AbstractCegarLoop]: Abstraction has 59003 states and 196965 transitions. [2021-08-21 12:11:40,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 59003 states and 196965 transitions. [2021-08-21 12:11:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:40,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:40,843 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:40,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:41,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-08-21 12:11:41,064 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:41,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1898934300, now seen corresponding path program 237 times [2021-08-21 12:11:41,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:41,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958646673] [2021-08-21 12:11:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:41,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:41,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:41,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958646673] [2021-08-21 12:11:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958646673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:41,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246081769] [2021-08-21 12:11:41,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:11:41,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:41,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:41,407 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:41,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 12:11:43,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:11:43,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:43,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:11:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:11:43,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246081769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:43,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:43,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 12:11:43,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294280600] [2021-08-21 12:11:43,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:11:43,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:11:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:11:43,425 INFO L87 Difference]: Start difference. First operand 59003 states and 196965 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:43,970 INFO L93 Difference]: Finished difference Result 59222 states and 197270 transitions. [2021-08-21 12:11:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:11:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:44,131 INFO L225 Difference]: With dead ends: 59222 [2021-08-21 12:11:44,131 INFO L226 Difference]: Without dead ends: 59218 [2021-08-21 12:11:44,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:11:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59218 states. [2021-08-21 12:11:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59218 to 58991. [2021-08-21 12:11:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.3339549076114596) internal successors, (196670), 58990 states have internal predecessors, (196670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196670 transitions. [2021-08-21 12:11:45,732 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196670 transitions. Word has length 24 [2021-08-21 12:11:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:45,732 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196670 transitions. [2021-08-21 12:11:45,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196670 transitions. [2021-08-21 12:11:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:45,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:45,752 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:45,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:45,969 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:45,970 INFO L82 PathProgramCache]: Analyzing trace with hash -287993342, now seen corresponding path program 238 times [2021-08-21 12:11:45,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:45,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142752003] [2021-08-21 12:11:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:45,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 31 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:46,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:46,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142752003] [2021-08-21 12:11:46,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142752003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:46,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276902179] [2021-08-21 12:11:46,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:11:46,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:46,080 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:46,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 12:11:48,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:11:48,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:48,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:11:48,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 50 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:11:48,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276902179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:48,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:48,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-08-21 12:11:48,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833987712] [2021-08-21 12:11:48,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:48,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:48,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:48,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:48,359 INFO L87 Difference]: Start difference. First operand 58991 states and 196670 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:48,895 INFO L93 Difference]: Finished difference Result 59212 states and 196981 transitions. [2021-08-21 12:11:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 12:11:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:49,087 INFO L225 Difference]: With dead ends: 59212 [2021-08-21 12:11:49,087 INFO L226 Difference]: Without dead ends: 59209 [2021-08-21 12:11:49,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:11:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59209 states. [2021-08-21 12:11:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59209 to 58991. [2021-08-21 12:11:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.333802339379556) internal successors, (196661), 58990 states have internal predecessors, (196661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196661 transitions. [2021-08-21 12:11:50,578 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196661 transitions. Word has length 24 [2021-08-21 12:11:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:50,578 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196661 transitions. [2021-08-21 12:11:50,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196661 transitions. [2021-08-21 12:11:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:50,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:50,599 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:50,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:50,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:50,821 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:50,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1888431196, now seen corresponding path program 239 times [2021-08-21 12:11:50,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:50,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079678699] [2021-08-21 12:11:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:50,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:50,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:50,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079678699] [2021-08-21 12:11:50,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079678699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:50,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992807981] [2021-08-21 12:11:50,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:11:50,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:50,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:50,931 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:50,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 12:11:53,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:11:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:53,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:11:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:53,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992807981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:53,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:53,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-21 12:11:53,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678152967] [2021-08-21 12:11:53,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:53,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:53,161 INFO L87 Difference]: Start difference. First operand 58991 states and 196661 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:53,789 INFO L93 Difference]: Finished difference Result 59358 states and 197517 transitions. [2021-08-21 12:11:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:11:53,790 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:53,982 INFO L225 Difference]: With dead ends: 59358 [2021-08-21 12:11:53,983 INFO L226 Difference]: Without dead ends: 59353 [2021-08-21 12:11:53,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:11:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59353 states. [2021-08-21 12:11:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59353 to 58991. [2021-08-21 12:11:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.333785387353789) internal successors, (196660), 58990 states have internal predecessors, (196660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196660 transitions. [2021-08-21 12:11:55,633 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196660 transitions. Word has length 24 [2021-08-21 12:11:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:11:55,633 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196660 transitions. [2021-08-21 12:11:55,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196660 transitions. [2021-08-21 12:11:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:11:55,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:11:55,654 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:11:55,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2021-08-21 12:11:55,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-08-21 12:11:55,875 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:11:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:11:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash 37602882, now seen corresponding path program 240 times [2021-08-21 12:11:55,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:11:55,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329041049] [2021-08-21 12:11:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:11:55,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:11:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:11:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 35 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:55,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:11:55,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329041049] [2021-08-21 12:11:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329041049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:55,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091670556] [2021-08-21 12:11:55,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:11:55,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:11:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:11:55,996 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:11:55,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 12:11:58,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:11:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:11:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:11:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:11:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 39 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:11:58,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091670556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:11:58,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:11:58,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-21 12:11:58,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190090509] [2021-08-21 12:11:58,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:11:58,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:11:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:11:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:11:58,181 INFO L87 Difference]: Start difference. First operand 58991 states and 196660 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:11:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:11:58,685 INFO L93 Difference]: Finished difference Result 59350 states and 197507 transitions. [2021-08-21 12:11:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:11:58,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:11:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:11:58,857 INFO L225 Difference]: With dead ends: 59350 [2021-08-21 12:11:58,857 INFO L226 Difference]: Without dead ends: 59345 [2021-08-21 12:11:58,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:11:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59345 states. [2021-08-21 12:12:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59345 to 58991. [2021-08-21 12:12:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.3337684353280217) internal successors, (196659), 58990 states have internal predecessors, (196659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196659 transitions. [2021-08-21 12:12:00,296 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196659 transitions. Word has length 24 [2021-08-21 12:12:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:00,296 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196659 transitions. [2021-08-21 12:12:00,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196659 transitions. [2021-08-21 12:12:00,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:00,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:00,317 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:00,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:00,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-21 12:12:00,529 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:00,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash -384882844, now seen corresponding path program 241 times [2021-08-21 12:12:00,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:00,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580049538] [2021-08-21 12:12:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:00,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:00,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:00,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580049538] [2021-08-21 12:12:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580049538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:00,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434450188] [2021-08-21 12:12:00,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:12:00,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:00,649 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:00,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 12:12:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:02,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:02,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 53 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:12:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434450188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:02,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:02,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-08-21 12:12:02,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531453195] [2021-08-21 12:12:02,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:12:02,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:12:02,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:12:02,891 INFO L87 Difference]: Start difference. First operand 58991 states and 196659 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:03,297 INFO L93 Difference]: Finished difference Result 59339 states and 197493 transitions. [2021-08-21 12:12:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:12:03,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:03,660 INFO L225 Difference]: With dead ends: 59339 [2021-08-21 12:12:03,660 INFO L226 Difference]: Without dead ends: 59333 [2021-08-21 12:12:03,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:12:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59333 states. [2021-08-21 12:12:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59333 to 58991. [2021-08-21 12:12:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58991 states, 58990 states have (on average 3.3337514833022546) internal successors, (196658), 58990 states have internal predecessors, (196658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58991 states to 58991 states and 196658 transitions. [2021-08-21 12:12:05,156 INFO L78 Accepts]: Start accepts. Automaton has 58991 states and 196658 transitions. Word has length 24 [2021-08-21 12:12:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:05,156 INFO L470 AbstractCegarLoop]: Abstraction has 58991 states and 196658 transitions. [2021-08-21 12:12:05,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 58991 states and 196658 transitions. [2021-08-21 12:12:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:05,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:05,180 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:05,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:05,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:05,401 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash -597038462, now seen corresponding path program 242 times [2021-08-21 12:12:05,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:05,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003700796] [2021-08-21 12:12:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:05,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 47 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:05,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:05,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003700796] [2021-08-21 12:12:05,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003700796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:05,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108010774] [2021-08-21 12:12:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:05,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:05,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:05,533 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:05,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-21 12:12:07,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:07,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:07,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 58 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:12:07,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108010774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:07,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:07,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 17 [2021-08-21 12:12:07,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806582699] [2021-08-21 12:12:07,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:12:07,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:07,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:12:07,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:12:07,952 INFO L87 Difference]: Start difference. First operand 58991 states and 196658 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:08,538 INFO L93 Difference]: Finished difference Result 59304 states and 197443 transitions. [2021-08-21 12:12:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:12:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:08,952 INFO L225 Difference]: With dead ends: 59304 [2021-08-21 12:12:08,952 INFO L226 Difference]: Without dead ends: 59297 [2021-08-21 12:12:08,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-08-21 12:12:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59297 states. [2021-08-21 12:12:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59297 to 58993. [2021-08-21 12:12:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58993 states, 58992 states have (on average 3.3336554109031735) internal successors, (196659), 58992 states have internal predecessors, (196659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58993 states to 58993 states and 196659 transitions. [2021-08-21 12:12:10,750 INFO L78 Accepts]: Start accepts. Automaton has 58993 states and 196659 transitions. Word has length 24 [2021-08-21 12:12:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:10,750 INFO L470 AbstractCegarLoop]: Abstraction has 58993 states and 196659 transitions. [2021-08-21 12:12:10,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:10,751 INFO L276 IsEmpty]: Start isEmpty. Operand 58993 states and 196659 transitions. [2021-08-21 12:12:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:10,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:10,774 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:10,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:10,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 12:12:10,996 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:10,996 INFO L82 PathProgramCache]: Analyzing trace with hash -63403514, now seen corresponding path program 243 times [2021-08-21 12:12:10,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:10,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143945586] [2021-08-21 12:12:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:10,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:12:11,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:11,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143945586] [2021-08-21 12:12:11,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143945586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:11,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673422270] [2021-08-21 12:12:11,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:11,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:11,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:11,081 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:11,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-21 12:12:13,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:12:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:13,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:12:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 64 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:13,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673422270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:13,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:13,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 12:12:13,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752379364] [2021-08-21 12:12:13,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:12:13,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:12:13,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:12:13,483 INFO L87 Difference]: Start difference. First operand 58993 states and 196659 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:13,885 INFO L93 Difference]: Finished difference Result 59193 states and 197081 transitions. [2021-08-21 12:12:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:12:13,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:14,104 INFO L225 Difference]: With dead ends: 59193 [2021-08-21 12:12:14,104 INFO L226 Difference]: Without dead ends: 59193 [2021-08-21 12:12:14,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:12:14,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59193 states. [2021-08-21 12:12:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59193 to 59032. [2021-08-21 12:12:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59032 states, 59031 states have (on average 3.3336043773610475) internal successors, (196786), 59031 states have internal predecessors, (196786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59032 states to 59032 states and 196786 transitions. [2021-08-21 12:12:16,097 INFO L78 Accepts]: Start accepts. Automaton has 59032 states and 196786 transitions. Word has length 24 [2021-08-21 12:12:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:16,097 INFO L470 AbstractCegarLoop]: Abstraction has 59032 states and 196786 transitions. [2021-08-21 12:12:16,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 59032 states and 196786 transitions. [2021-08-21 12:12:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:16,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:16,120 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:16,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:16,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 12:12:16,343 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:16,343 INFO L82 PathProgramCache]: Analyzing trace with hash -917681628, now seen corresponding path program 244 times [2021-08-21 12:12:16,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:16,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759806195] [2021-08-21 12:12:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:16,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 33 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:12:16,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:16,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759806195] [2021-08-21 12:12:16,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759806195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:16,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644562218] [2021-08-21 12:12:16,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:12:16,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:16,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:16,445 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:16,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2021-08-21 12:12:18,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:12:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 51 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:12:18,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644562218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:18,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:18,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 14 [2021-08-21 12:12:18,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449009936] [2021-08-21 12:12:18,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:12:18,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:12:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:12:18,691 INFO L87 Difference]: Start difference. First operand 59032 states and 196786 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:19,117 INFO L93 Difference]: Finished difference Result 59269 states and 197362 transitions. [2021-08-21 12:12:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:12:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:19,316 INFO L225 Difference]: With dead ends: 59269 [2021-08-21 12:12:19,316 INFO L226 Difference]: Without dead ends: 59265 [2021-08-21 12:12:19,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:12:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59265 states. [2021-08-21 12:12:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59265 to 59032. [2021-08-21 12:12:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59032 states, 59031 states have (on average 3.3335704968575834) internal successors, (196784), 59031 states have internal predecessors, (196784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59032 states to 59032 states and 196784 transitions. [2021-08-21 12:12:21,429 INFO L78 Accepts]: Start accepts. Automaton has 59032 states and 196784 transitions. Word has length 24 [2021-08-21 12:12:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:21,429 INFO L470 AbstractCegarLoop]: Abstraction has 59032 states and 196784 transitions. [2021-08-21 12:12:21,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 59032 states and 196784 transitions. [2021-08-21 12:12:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:21,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:21,449 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:21,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:21,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-08-21 12:12:21,664 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:21,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1762653080, now seen corresponding path program 245 times [2021-08-21 12:12:21,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:21,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672019578] [2021-08-21 12:12:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:21,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 29 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:21,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:21,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672019578] [2021-08-21 12:12:21,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672019578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:21,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022997937] [2021-08-21 12:12:21,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:12:21,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:21,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:21,753 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:21,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2021-08-21 12:12:23,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:12:23,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:23,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 46 proven. 43 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:12:23,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022997937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:23,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:23,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2021-08-21 12:12:23,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280227039] [2021-08-21 12:12:23,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:12:23,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:12:23,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:12:23,930 INFO L87 Difference]: Start difference. First operand 59032 states and 196784 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:24,363 INFO L93 Difference]: Finished difference Result 59418 states and 197710 transitions. [2021-08-21 12:12:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:12:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:24,579 INFO L225 Difference]: With dead ends: 59418 [2021-08-21 12:12:24,580 INFO L226 Difference]: Without dead ends: 59414 [2021-08-21 12:12:24,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:12:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59414 states. [2021-08-21 12:12:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59414 to 59032. [2021-08-21 12:12:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59032 states, 59031 states have (on average 3.333502735850655) internal successors, (196780), 59031 states have internal predecessors, (196780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59032 states to 59032 states and 196780 transitions. [2021-08-21 12:12:26,498 INFO L78 Accepts]: Start accepts. Automaton has 59032 states and 196780 transitions. Word has length 24 [2021-08-21 12:12:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:26,498 INFO L470 AbstractCegarLoop]: Abstraction has 59032 states and 196780 transitions. [2021-08-21 12:12:26,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 59032 states and 196780 transitions. [2021-08-21 12:12:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:26,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:26,516 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:26,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:26,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:26,737 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash 163380998, now seen corresponding path program 246 times [2021-08-21 12:12:26,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:26,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930197472] [2021-08-21 12:12:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:26,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:26,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:26,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930197472] [2021-08-21 12:12:26,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930197472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:26,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504806638] [2021-08-21 12:12:26,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:12:26,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:26,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:26,838 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:26,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2021-08-21 12:12:28,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:12:28,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:28,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:12:28,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:12:28,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504806638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:28,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:28,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 12:12:28,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975305785] [2021-08-21 12:12:28,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:12:28,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:12:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:12:28,993 INFO L87 Difference]: Start difference. First operand 59032 states and 196780 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:29,438 INFO L93 Difference]: Finished difference Result 59369 states and 197614 transitions. [2021-08-21 12:12:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:12:29,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:29,640 INFO L225 Difference]: With dead ends: 59369 [2021-08-21 12:12:29,640 INFO L226 Difference]: Without dead ends: 59364 [2021-08-21 12:12:29,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:12:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59364 states. [2021-08-21 12:12:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59364 to 59039. [2021-08-21 12:12:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59039 states, 59038 states have (on average 3.3334293167112707) internal successors, (196799), 59038 states have internal predecessors, (196799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59039 states to 59039 states and 196799 transitions. [2021-08-21 12:12:31,687 INFO L78 Accepts]: Start accepts. Automaton has 59039 states and 196799 transitions. Word has length 24 [2021-08-21 12:12:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:31,687 INFO L470 AbstractCegarLoop]: Abstraction has 59039 states and 196799 transitions. [2021-08-21 12:12:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 59039 states and 196799 transitions. [2021-08-21 12:12:31,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:31,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:31,707 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:31,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:31,929 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2108002980, now seen corresponding path program 247 times [2021-08-21 12:12:31,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:31,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678810997] [2021-08-21 12:12:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:31,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 28 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:32,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:32,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678810997] [2021-08-21 12:12:32,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678810997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:32,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780953591] [2021-08-21 12:12:32,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:12:32,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:32,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:32,032 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:32,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2021-08-21 12:12:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:34,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:34,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 44 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:34,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780953591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:34,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:34,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-08-21 12:12:34,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911328185] [2021-08-21 12:12:34,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:12:34,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:34,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:12:34,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:12:34,272 INFO L87 Difference]: Start difference. First operand 59039 states and 196799 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:34,696 INFO L93 Difference]: Finished difference Result 59455 states and 197766 transitions. [2021-08-21 12:12:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:12:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:34,892 INFO L225 Difference]: With dead ends: 59455 [2021-08-21 12:12:34,893 INFO L226 Difference]: Without dead ends: 59451 [2021-08-21 12:12:34,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:12:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59451 states. [2021-08-21 12:12:36,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59451 to 59039. [2021-08-21 12:12:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59039 states, 59038 states have (on average 3.3333276872522783) internal successors, (196793), 59038 states have internal predecessors, (196793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59039 states to 59039 states and 196793 transitions. [2021-08-21 12:12:36,909 INFO L78 Accepts]: Start accepts. Automaton has 59039 states and 196793 transitions. Word has length 24 [2021-08-21 12:12:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:36,909 INFO L470 AbstractCegarLoop]: Abstraction has 59039 states and 196793 transitions. [2021-08-21 12:12:36,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 59039 states and 196793 transitions. [2021-08-21 12:12:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:36,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:36,931 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:36,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:37,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:37,152 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash -260930238, now seen corresponding path program 248 times [2021-08-21 12:12:37,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:37,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341763600] [2021-08-21 12:12:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:37,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:37,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341763600] [2021-08-21 12:12:37,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341763600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651123192] [2021-08-21 12:12:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:37,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:37,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:37,258 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:37,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2021-08-21 12:12:39,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:12:39,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 46 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:39,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651123192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:39,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:39,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2021-08-21 12:12:39,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444551894] [2021-08-21 12:12:39,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:12:39,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:39,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:12:39,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:12:39,400 INFO L87 Difference]: Start difference. First operand 59039 states and 196793 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:39,856 INFO L93 Difference]: Finished difference Result 59468 states and 197834 transitions. [2021-08-21 12:12:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:12:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:40,047 INFO L225 Difference]: With dead ends: 59468 [2021-08-21 12:12:40,047 INFO L226 Difference]: Without dead ends: 59463 [2021-08-21 12:12:40,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:12:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59463 states. [2021-08-21 12:12:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59463 to 59041. [2021-08-21 12:12:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59041 states, 59040 states have (on average 3.3333333333333335) internal successors, (196800), 59040 states have internal predecessors, (196800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59041 states to 59041 states and 196800 transitions. [2021-08-21 12:12:42,008 INFO L78 Accepts]: Start accepts. Automaton has 59041 states and 196800 transitions. Word has length 24 [2021-08-21 12:12:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:42,008 INFO L470 AbstractCegarLoop]: Abstraction has 59041 states and 196800 transitions. [2021-08-21 12:12:42,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 59041 states and 196800 transitions. [2021-08-21 12:12:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:42,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:42,033 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:42,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:42,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:42,255 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash -683415964, now seen corresponding path program 249 times [2021-08-21 12:12:42,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:42,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451273291] [2021-08-21 12:12:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:42,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:42,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:42,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451273291] [2021-08-21 12:12:42,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451273291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:42,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446304988] [2021-08-21 12:12:42,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:42,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:42,363 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:42,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2021-08-21 12:12:44,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:12:44,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:44,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:12:44,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:12:44,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446304988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:44,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:44,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 12:12:44,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229390805] [2021-08-21 12:12:44,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:12:44,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:12:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:12:44,380 INFO L87 Difference]: Start difference. First operand 59041 states and 196800 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:44,857 INFO L93 Difference]: Finished difference Result 59437 states and 197788 transitions. [2021-08-21 12:12:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:12:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:45,053 INFO L225 Difference]: With dead ends: 59437 [2021-08-21 12:12:45,054 INFO L226 Difference]: Without dead ends: 59431 [2021-08-21 12:12:45,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:12:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59431 states. [2021-08-21 12:12:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59431 to 59052. [2021-08-21 12:12:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59052 states, 59051 states have (on average 3.3332035020575437) internal successors, (196829), 59051 states have internal predecessors, (196829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59052 states to 59052 states and 196829 transitions. [2021-08-21 12:12:47,064 INFO L78 Accepts]: Start accepts. Automaton has 59052 states and 196829 transitions. Word has length 24 [2021-08-21 12:12:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:47,064 INFO L470 AbstractCegarLoop]: Abstraction has 59052 states and 196829 transitions. [2021-08-21 12:12:47,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 59052 states and 196829 transitions. [2021-08-21 12:12:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:47,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:47,087 INFO L512 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:47,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:47,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:47,309 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:12:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1839256552, now seen corresponding path program 250 times [2021-08-21 12:12:47,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:47,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393874765] [2021-08-21 12:12:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:47,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 29 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:12:47,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:47,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393874765] [2021-08-21 12:12:47,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393874765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:47,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410679064] [2021-08-21 12:12:47,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:12:47,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:47,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:47,414 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:12:47,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process