/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/mult-flipped-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:08:46,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:08:46,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:08:46,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:08:46,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 14:08:46,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 14:08:46,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 14:08:46,283 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 [2021-08-06 14:08:46,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:08:46,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:08:46,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:08:46,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:08:46,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:08:46,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:08:46,309 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:08:46,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:08:46,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:08:46,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:08:46,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:08:46,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:08:46,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:08:46,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:08:46,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:08:46,311 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:08:46,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:08:46,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:08:46,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:08:46,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:08:46,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:08:46,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:08:46,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:08:46,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:08:46,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:08:46,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:08:46,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:08:46,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:08:46,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:08:46,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:08:46,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:08:46,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:08:46,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:08:46,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:08:46,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:08:46,638 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:08:46,641 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:08:46,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl [2021-08-06 14:08:46,643 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl' [2021-08-06 14:08:46,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:08:46,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:08:46,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:08:46,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:08:46,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:08:46,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:08:46,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:08:46,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:08:46,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:08:46,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:08:46,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:08:46,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:08:46,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:08:46,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/1) ... [2021-08-06 14:08:46,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:08:46,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:46,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 14:08:46,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 14:08:46,769 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:08:46,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:08:46,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:08:46,770 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:08:46,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:08:46,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:08:46,770 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:08:46,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:08:46,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:08:46,771 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:08:46,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:08:46,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:08:46,772 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:08:46,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:08:46,990 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 14:08:46,992 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:08:46 BoogieIcfgContainer [2021-08-06 14:08:46,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:08:46,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:08:46,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:08:46,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:08:46,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:08:46" (1/2) ... [2021-08-06 14:08:46,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d54a9e0 and model type mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:08:46, skipping insertion in model container [2021-08-06 14:08:46,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:08:46" (2/2) ... [2021-08-06 14:08:46,999 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.bpl [2021-08-06 14:08:47,003 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:08:47,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:08:47,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:08:47,003 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:08:47,038 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 14:08:47,128 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:08:47,135 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 14:08:47,135 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 14:08:47,158 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-08-06 14:08:47,185 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:08:47,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:47,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:47,199 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:47,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1698271758, now seen corresponding path program 1 times [2021-08-06 14:08:47,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:47,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519362436] [2021-08-06 14:08:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:47,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:47,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:47,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519362436] [2021-08-06 14:08:47,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519362436] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:08:47,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:08:47,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 14:08:47,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630640492] [2021-08-06 14:08:47,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:08:47,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:08:47,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:08:47,562 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:47,594 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-08-06 14:08:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:08:47,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:08:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:47,607 INFO L225 Difference]: With dead ends: 214 [2021-08-06 14:08:47,608 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 14:08:47,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:08:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 14:08:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-08-06 14:08:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-08-06 14:08:47,666 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-08-06 14:08:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:47,667 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-08-06 14:08:47,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-08-06 14:08:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:08:47,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:47,669 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:47,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:08:47,670 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:47,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1717700848, now seen corresponding path program 1 times [2021-08-06 14:08:47,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:47,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900001968] [2021-08-06 14:08:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:47,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:47,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:47,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900001968] [2021-08-06 14:08:47,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900001968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845120631] [2021-08-06 14:08:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:47,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:47,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:47,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:47,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 14:08:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:08:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:47,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845120631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:47,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:47,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 14:08:47,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167718707] [2021-08-06 14:08:47,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:08:47,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:47,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:08:47,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:47,967 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:48,083 INFO L93 Difference]: Finished difference Result 344 states and 959 transitions. [2021-08-06 14:08:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:48,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 17 [2021-08-06 14:08:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:48,090 INFO L225 Difference]: With dead ends: 344 [2021-08-06 14:08:48,090 INFO L226 Difference]: Without dead ends: 344 [2021-08-06 14:08:48,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-06 14:08:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 172. [2021-08-06 14:08:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.953216374269006) internal successors, (505), 171 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 505 transitions. [2021-08-06 14:08:48,122 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 505 transitions. Word has length 17 [2021-08-06 14:08:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:48,122 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 505 transitions. [2021-08-06 14:08:48,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 505 transitions. [2021-08-06 14:08:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:08:48,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:48,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:48,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 14:08:48,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:48,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1520327342, now seen corresponding path program 1 times [2021-08-06 14:08:48,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:48,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858374632] [2021-08-06 14:08:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:48,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:48,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:48,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858374632] [2021-08-06 14:08:48,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858374632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:08:48,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:08:48,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:08:48,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356314746] [2021-08-06 14:08:48,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:08:48,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:48,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:08:48,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:08:48,397 INFO L87 Difference]: Start difference. First operand 172 states and 505 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:48,441 INFO L93 Difference]: Finished difference Result 237 states and 639 transitions. [2021-08-06 14:08:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:08:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:08:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:48,444 INFO L225 Difference]: With dead ends: 237 [2021-08-06 14:08:48,444 INFO L226 Difference]: Without dead ends: 227 [2021-08-06 14:08:48,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:08:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-08-06 14:08:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 186. [2021-08-06 14:08:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.843243243243243) internal successors, (526), 185 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 526 transitions. [2021-08-06 14:08:48,495 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 526 transitions. Word has length 17 [2021-08-06 14:08:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:48,495 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 526 transitions. [2021-08-06 14:08:48,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 526 transitions. [2021-08-06 14:08:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:08:48,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:48,507 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:48,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:08:48,508 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash 388922220, now seen corresponding path program 1 times [2021-08-06 14:08:48,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:48,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064631338] [2021-08-06 14:08:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:48,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:48,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:48,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064631338] [2021-08-06 14:08:48,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064631338] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:08:48,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:08:48,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:08:48,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013224051] [2021-08-06 14:08:48,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:08:48,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:08:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:08:48,541 INFO L87 Difference]: Start difference. First operand 186 states and 526 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:48,586 INFO L93 Difference]: Finished difference Result 317 states and 868 transitions. [2021-08-06 14:08:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:08:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:08:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:48,591 INFO L225 Difference]: With dead ends: 317 [2021-08-06 14:08:48,591 INFO L226 Difference]: Without dead ends: 302 [2021-08-06 14:08:48,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:08:48,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-06 14:08:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 231. [2021-08-06 14:08:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.8869565217391306) internal successors, (664), 230 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 664 transitions. [2021-08-06 14:08:48,609 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 664 transitions. Word has length 17 [2021-08-06 14:08:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:48,609 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 664 transitions. [2021-08-06 14:08:48,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,609 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 664 transitions. [2021-08-06 14:08:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:08:48,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:48,611 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:48,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:08:48,611 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:48,612 INFO L82 PathProgramCache]: Analyzing trace with hash -367822358, now seen corresponding path program 2 times [2021-08-06 14:08:48,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:48,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920494599] [2021-08-06 14:08:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:48,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:48,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:48,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920494599] [2021-08-06 14:08:48,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920494599] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:08:48,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:08:48,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:08:48,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582075371] [2021-08-06 14:08:48,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:08:48,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:48,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:08:48,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:08:48,645 INFO L87 Difference]: Start difference. First operand 231 states and 664 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:48,673 INFO L93 Difference]: Finished difference Result 274 states and 779 transitions. [2021-08-06 14:08:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:08:48,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:08:48,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:48,675 INFO L225 Difference]: With dead ends: 274 [2021-08-06 14:08:48,675 INFO L226 Difference]: Without dead ends: 274 [2021-08-06 14:08:48,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:08:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-08-06 14:08:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 243. [2021-08-06 14:08:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.8925619834710745) internal successors, (700), 242 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 700 transitions. [2021-08-06 14:08:48,684 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 700 transitions. Word has length 17 [2021-08-06 14:08:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:48,684 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 700 transitions. [2021-08-06 14:08:48,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 700 transitions. [2021-08-06 14:08:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:08:48,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:48,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:48,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 14:08:48,686 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash -320771866, now seen corresponding path program 3 times [2021-08-06 14:08:48,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:48,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112809658] [2021-08-06 14:08:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:48,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:48,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:48,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112809658] [2021-08-06 14:08:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112809658] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:08:48,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:08:48,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:08:48,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775464868] [2021-08-06 14:08:48,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:08:48,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:08:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:08:48,774 INFO L87 Difference]: Start difference. First operand 243 states and 700 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:48,826 INFO L93 Difference]: Finished difference Result 296 states and 805 transitions. [2021-08-06 14:08:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:08:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:08:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:48,834 INFO L225 Difference]: With dead ends: 296 [2021-08-06 14:08:48,834 INFO L226 Difference]: Without dead ends: 282 [2021-08-06 14:08:48,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:08:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-08-06 14:08:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 229. [2021-08-06 14:08:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.8421052631578947) internal successors, (648), 228 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 648 transitions. [2021-08-06 14:08:48,842 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 648 transitions. Word has length 17 [2021-08-06 14:08:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:48,842 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 648 transitions. [2021-08-06 14:08:48,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 648 transitions. [2021-08-06 14:08:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:08:48,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:48,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:48,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 14:08:48,844 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash 830951980, now seen corresponding path program 2 times [2021-08-06 14:08:48,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:48,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303952986] [2021-08-06 14:08:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:48,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:48,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:48,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303952986] [2021-08-06 14:08:48,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303952986] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:08:48,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:08:48,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:08:48,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143657659] [2021-08-06 14:08:48,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:08:48,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:48,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:08:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:08:48,908 INFO L87 Difference]: Start difference. First operand 229 states and 648 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:48,947 INFO L93 Difference]: Finished difference Result 236 states and 661 transitions. [2021-08-06 14:08:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:08:48,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:08:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:48,949 INFO L225 Difference]: With dead ends: 236 [2021-08-06 14:08:48,949 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 14:08:48,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:08:48,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 14:08:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 212. [2021-08-06 14:08:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.876777251184834) internal successors, (607), 211 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 607 transitions. [2021-08-06 14:08:48,956 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 607 transitions. Word has length 17 [2021-08-06 14:08:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:48,956 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 607 transitions. [2021-08-06 14:08:48,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 607 transitions. [2021-08-06 14:08:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:08:48,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:48,957 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:48,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 14:08:48,957 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1480901912, now seen corresponding path program 3 times [2021-08-06 14:08:48,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:48,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085381715] [2021-08-06 14:08:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:48,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:49,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:49,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085381715] [2021-08-06 14:08:49,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085381715] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:08:49,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:08:49,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:08:49,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296721080] [2021-08-06 14:08:49,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:08:49,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:08:49,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:08:49,011 INFO L87 Difference]: Start difference. First operand 212 states and 607 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:49,036 INFO L93 Difference]: Finished difference Result 225 states and 655 transitions. [2021-08-06 14:08:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:08:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:08:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:49,038 INFO L225 Difference]: With dead ends: 225 [2021-08-06 14:08:49,038 INFO L226 Difference]: Without dead ends: 225 [2021-08-06 14:08:49,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:08:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-06 14:08:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 214. [2021-08-06 14:08:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.92018779342723) internal successors, (622), 213 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 622 transitions. [2021-08-06 14:08:49,044 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 622 transitions. Word has length 17 [2021-08-06 14:08:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:49,045 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 622 transitions. [2021-08-06 14:08:49,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 622 transitions. [2021-08-06 14:08:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:08:49,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:49,046 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:49,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 14:08:49,046 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:49,047 INFO L82 PathProgramCache]: Analyzing trace with hash -947012380, now seen corresponding path program 4 times [2021-08-06 14:08:49,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:49,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714859509] [2021-08-06 14:08:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:49,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:49,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:49,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714859509] [2021-08-06 14:08:49,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714859509] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:08:49,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:08:49,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:08:49,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106881629] [2021-08-06 14:08:49,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:08:49,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:08:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:08:49,109 INFO L87 Difference]: Start difference. First operand 214 states and 622 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:49,153 INFO L93 Difference]: Finished difference Result 217 states and 619 transitions. [2021-08-06 14:08:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:08:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:08:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:49,158 INFO L225 Difference]: With dead ends: 217 [2021-08-06 14:08:49,160 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 14:08:49,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:08:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 14:08:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2021-08-06 14:08:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9114583333333335) internal successors, (559), 192 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 559 transitions. [2021-08-06 14:08:49,177 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 559 transitions. Word has length 17 [2021-08-06 14:08:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:49,178 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 559 transitions. [2021-08-06 14:08:49,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 559 transitions. [2021-08-06 14:08:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:08:49,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:49,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:49,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 14:08:49,179 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2082193652, now seen corresponding path program 1 times [2021-08-06 14:08:49,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:49,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927929727] [2021-08-06 14:08:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:49,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:49,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:49,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927929727] [2021-08-06 14:08:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927929727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:49,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024297924] [2021-08-06 14:08:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:49,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:49,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:49,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:49,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 14:08:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:49,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:08:49,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:49,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024297924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:49,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:49,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 14:08:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765257433] [2021-08-06 14:08:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:08:49,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:08:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:49,476 INFO L87 Difference]: Start difference. First operand 193 states and 559 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:49,530 INFO L93 Difference]: Finished difference Result 251 states and 731 transitions. [2021-08-06 14:08:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 19 [2021-08-06 14:08:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:49,532 INFO L225 Difference]: With dead ends: 251 [2021-08-06 14:08:49,532 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 14:08:49,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 14:08:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 190. [2021-08-06 14:08:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9100529100529102) internal successors, (550), 189 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 550 transitions. [2021-08-06 14:08:49,538 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 550 transitions. Word has length 19 [2021-08-06 14:08:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:49,539 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 550 transitions. [2021-08-06 14:08:49,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 550 transitions. [2021-08-06 14:08:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:08:49,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:49,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:49,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:49,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 14:08:49,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1166690382, now seen corresponding path program 1 times [2021-08-06 14:08:49,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:49,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708542791] [2021-08-06 14:08:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:49,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:49,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:49,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708542791] [2021-08-06 14:08:49,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708542791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:49,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299233288] [2021-08-06 14:08:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:49,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:49,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:49,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:49,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 14:08:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:50,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299233288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:50,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:50,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 14:08:50,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133972284] [2021-08-06 14:08:50,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:50,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:50,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:50,316 INFO L87 Difference]: Start difference. First operand 190 states and 550 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-06 14:08:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:50,381 INFO L93 Difference]: Finished difference Result 516 states and 1501 transitions. [2021-08-06 14:08:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:08:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) Word has length 21 [2021-08-06 14:08:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:50,385 INFO L225 Difference]: With dead ends: 516 [2021-08-06 14:08:50,385 INFO L226 Difference]: Without dead ends: 501 [2021-08-06 14:08:50,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-06 14:08:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 287. [2021-08-06 14:08:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1363636363636362) internal successors, (897), 286 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 897 transitions. [2021-08-06 14:08:50,395 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 897 transitions. Word has length 21 [2021-08-06 14:08:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:50,395 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 897 transitions. [2021-08-06 14:08:50,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-06 14:08:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 897 transitions. [2021-08-06 14:08:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:08:50,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:50,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:50,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:50,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:50,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:50,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2047129442, now seen corresponding path program 2 times [2021-08-06 14:08:50,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:50,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163693629] [2021-08-06 14:08:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:50,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:50,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:50,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163693629] [2021-08-06 14:08:50,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163693629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:50,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852480241] [2021-08-06 14:08:50,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:08:50,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:50,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:50,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:50,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 14:08:50,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:50,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:50,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:51,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852480241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:51,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:51,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 14:08:51,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434517813] [2021-08-06 14:08:51,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:51,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:51,178 INFO L87 Difference]: Start difference. First operand 287 states and 897 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 14:08:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:51,242 INFO L93 Difference]: Finished difference Result 609 states and 1835 transitions. [2021-08-06 14:08:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:08:51,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) Word has length 21 [2021-08-06 14:08:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:51,246 INFO L225 Difference]: With dead ends: 609 [2021-08-06 14:08:51,247 INFO L226 Difference]: Without dead ends: 594 [2021-08-06 14:08:51,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-06 14:08:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 376. [2021-08-06 14:08:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.2346666666666666) internal successors, (1213), 375 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1213 transitions. [2021-08-06 14:08:51,262 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1213 transitions. Word has length 21 [2021-08-06 14:08:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:51,262 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1213 transitions. [2021-08-06 14:08:51,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 14:08:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1213 transitions. [2021-08-06 14:08:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:08:51,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:51,265 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:51,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:51,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:51,480 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:51,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2140019540, now seen corresponding path program 3 times [2021-08-06 14:08:51,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:51,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792943404] [2021-08-06 14:08:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:51,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:51,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:51,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792943404] [2021-08-06 14:08:51,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792943404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:51,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266405231] [2021-08-06 14:08:51,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:08:51,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:51,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:51,587 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:51,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 14:08:51,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:08:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:51,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266405231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:51,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:51,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 14:08:51,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046803551] [2021-08-06 14:08:51,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:51,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:51,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:51,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:51,994 INFO L87 Difference]: Start difference. First operand 376 states and 1213 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-06 14:08:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:52,090 INFO L93 Difference]: Finished difference Result 509 states and 1606 transitions. [2021-08-06 14:08:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) Word has length 21 [2021-08-06 14:08:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:52,094 INFO L225 Difference]: With dead ends: 509 [2021-08-06 14:08:52,094 INFO L226 Difference]: Without dead ends: 494 [2021-08-06 14:08:52,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-08-06 14:08:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 391. [2021-08-06 14:08:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 3.2435897435897436) internal successors, (1265), 390 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1265 transitions. [2021-08-06 14:08:52,105 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1265 transitions. Word has length 21 [2021-08-06 14:08:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:52,105 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1265 transitions. [2021-08-06 14:08:52,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-06 14:08:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1265 transitions. [2021-08-06 14:08:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:08:52,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:52,108 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:52,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:52,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 14:08:52,332 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1117539740, now seen corresponding path program 4 times [2021-08-06 14:08:52,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:52,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343991171] [2021-08-06 14:08:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:52,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:52,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:52,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343991171] [2021-08-06 14:08:52,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343991171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:52,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030817732] [2021-08-06 14:08:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:08:52,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:52,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:52,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:52,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 14:08:52,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:08:52,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:52,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:52,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:52,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030817732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:52,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:52,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 14:08:52,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810762428] [2021-08-06 14:08:52,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:52,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:52,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:52,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:52,858 INFO L87 Difference]: Start difference. First operand 391 states and 1265 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 14:08:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:52,982 INFO L93 Difference]: Finished difference Result 520 states and 1646 transitions. [2021-08-06 14:08:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:52,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) Word has length 21 [2021-08-06 14:08:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:52,986 INFO L225 Difference]: With dead ends: 520 [2021-08-06 14:08:52,986 INFO L226 Difference]: Without dead ends: 505 [2021-08-06 14:08:52,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-06 14:08:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 415. [2021-08-06 14:08:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-08-06 14:08:53,000 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 21 [2021-08-06 14:08:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:53,000 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-08-06 14:08:53,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 14:08:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-08-06 14:08:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:08:53,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:53,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:53,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:53,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:53,210 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash -466698584, now seen corresponding path program 5 times [2021-08-06 14:08:53,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:53,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312743556] [2021-08-06 14:08:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:53,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:53,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:53,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312743556] [2021-08-06 14:08:53,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312743556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:53,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321765178] [2021-08-06 14:08:53,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:08:53,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:53,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:53,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:53,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 14:08:53,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:53,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321765178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:53,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:53,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 14:08:53,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177559936] [2021-08-06 14:08:53,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:53,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:53,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:53,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:53,769 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 14:08:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:53,900 INFO L93 Difference]: Finished difference Result 590 states and 1850 transitions. [2021-08-06 14:08:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) Word has length 21 [2021-08-06 14:08:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:53,915 INFO L225 Difference]: With dead ends: 590 [2021-08-06 14:08:53,915 INFO L226 Difference]: Without dead ends: 575 [2021-08-06 14:08:53,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-08-06 14:08:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 443. [2021-08-06 14:08:53,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.2217194570135748) internal successors, (1424), 442 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1424 transitions. [2021-08-06 14:08:53,928 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1424 transitions. Word has length 21 [2021-08-06 14:08:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:53,928 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1424 transitions. [2021-08-06 14:08:53,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 14:08:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1424 transitions. [2021-08-06 14:08:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:08:53,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:53,929 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:53,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:54,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:54,146 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1622751956, now seen corresponding path program 6 times [2021-08-06 14:08:54,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:54,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587837454] [2021-08-06 14:08:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:54,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:54,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:54,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587837454] [2021-08-06 14:08:54,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587837454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:54,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408502487] [2021-08-06 14:08:54,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:54,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:54,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:54,241 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:54,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 14:08:54,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:08:54,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 14:08:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:54,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408502487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:54,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:54,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 14:08:54,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458533738] [2021-08-06 14:08:54,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:08:54,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:08:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:54,671 INFO L87 Difference]: Start difference. First operand 443 states and 1424 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2021-08-06 14:08:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:54,773 INFO L93 Difference]: Finished difference Result 575 states and 1813 transitions. [2021-08-06 14:08:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:08:54,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) Word has length 21 [2021-08-06 14:08:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:54,777 INFO L225 Difference]: With dead ends: 575 [2021-08-06 14:08:54,777 INFO L226 Difference]: Without dead ends: 560 [2021-08-06 14:08:54,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-06 14:08:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 443. [2021-08-06 14:08:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.2217194570135748) internal successors, (1424), 442 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1424 transitions. [2021-08-06 14:08:54,790 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1424 transitions. Word has length 21 [2021-08-06 14:08:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:54,790 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1424 transitions. [2021-08-06 14:08:54,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2021-08-06 14:08:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1424 transitions. [2021-08-06 14:08:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:08:54,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:54,792 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:54,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:55,012 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,SelfDestructingSolverStorable15 [2021-08-06 14:08:55,013 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash 271449364, now seen corresponding path program 7 times [2021-08-06 14:08:55,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:55,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790949871] [2021-08-06 14:08:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:55,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:55,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:55,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790949871] [2021-08-06 14:08:55,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790949871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:55,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918575798] [2021-08-06 14:08:55,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:08:55,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:55,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:55,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:55,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 14:08:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:08:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:55,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918575798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:55,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:55,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:08:55,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314777506] [2021-08-06 14:08:55,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:55,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:55,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:55,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:55,402 INFO L87 Difference]: Start difference. First operand 443 states and 1424 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:55,502 INFO L93 Difference]: Finished difference Result 838 states and 2481 transitions. [2021-08-06 14:08:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:55,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 23 [2021-08-06 14:08:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:55,507 INFO L225 Difference]: With dead ends: 838 [2021-08-06 14:08:55,508 INFO L226 Difference]: Without dead ends: 838 [2021-08-06 14:08:55,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:08:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-08-06 14:08:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 514. [2021-08-06 14:08:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.2144249512670564) internal successors, (1649), 513 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1649 transitions. [2021-08-06 14:08:55,526 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1649 transitions. Word has length 23 [2021-08-06 14:08:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:55,526 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1649 transitions. [2021-08-06 14:08:55,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1649 transitions. [2021-08-06 14:08:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:08:55,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:55,528 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:55,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:55,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 14:08:55,753 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -914641452, now seen corresponding path program 8 times [2021-08-06 14:08:55,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:55,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544403775] [2021-08-06 14:08:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:55,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:55,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:55,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544403775] [2021-08-06 14:08:55,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544403775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:55,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374118120] [2021-08-06 14:08:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:08:55,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:55,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:55,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:55,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 14:08:56,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:08:56,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:56,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:08:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:56,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374118120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:56,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:56,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:08:56,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12050626] [2021-08-06 14:08:56,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:56,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:56,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:56,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:56,152 INFO L87 Difference]: Start difference. First operand 514 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:56,238 INFO L93 Difference]: Finished difference Result 846 states and 2595 transitions. [2021-08-06 14:08:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 23 [2021-08-06 14:08:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:56,243 INFO L225 Difference]: With dead ends: 846 [2021-08-06 14:08:56,243 INFO L226 Difference]: Without dead ends: 821 [2021-08-06 14:08:56,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-08-06 14:08:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 666. [2021-08-06 14:08:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.231578947368421) internal successors, (2149), 665 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2149 transitions. [2021-08-06 14:08:56,263 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2149 transitions. Word has length 23 [2021-08-06 14:08:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:56,263 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 2149 transitions. [2021-08-06 14:08:56,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2149 transitions. [2021-08-06 14:08:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:08:56,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:56,265 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:56,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:56,480 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,SelfDestructingSolverStorable17 [2021-08-06 14:08:56,481 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1495214352, now seen corresponding path program 9 times [2021-08-06 14:08:56,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:56,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465972068] [2021-08-06 14:08:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:56,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:56,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:56,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465972068] [2021-08-06 14:08:56,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465972068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:56,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762926392] [2021-08-06 14:08:56,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:08:56,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:56,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:56,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 14:08:56,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:08:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:08:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:56,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762926392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:56,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:56,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:08:56,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969735173] [2021-08-06 14:08:56,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:08:56,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:56,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:08:56,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:08:56,854 INFO L87 Difference]: Start difference. First operand 666 states and 2149 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:56,952 INFO L93 Difference]: Finished difference Result 1385 states and 4396 transitions. [2021-08-06 14:08:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 23 [2021-08-06 14:08:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:56,965 INFO L225 Difference]: With dead ends: 1385 [2021-08-06 14:08:56,965 INFO L226 Difference]: Without dead ends: 1349 [2021-08-06 14:08:56,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-08-06 14:08:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 889. [2021-08-06 14:08:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.365990990990991) internal successors, (2989), 888 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2989 transitions. [2021-08-06 14:08:57,009 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2989 transitions. Word has length 23 [2021-08-06 14:08:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:57,009 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2989 transitions. [2021-08-06 14:08:57,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2989 transitions. [2021-08-06 14:08:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:08:57,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:57,013 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:57,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:57,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:57,221 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:57,222 INFO L82 PathProgramCache]: Analyzing trace with hash 9646224, now seen corresponding path program 10 times [2021-08-06 14:08:57,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:57,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110660361] [2021-08-06 14:08:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:57,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:57,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:57,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110660361] [2021-08-06 14:08:57,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110660361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:57,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40186451] [2021-08-06 14:08:57,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:08:57,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:57,261 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:57,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 14:08:57,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:08:57,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:08:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:57,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40186451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:57,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:57,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:08:57,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009521416] [2021-08-06 14:08:57,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:08:57,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:57,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:08:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:57,583 INFO L87 Difference]: Start difference. First operand 889 states and 2989 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:57,667 INFO L93 Difference]: Finished difference Result 1122 states and 3588 transitions. [2021-08-06 14:08:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:08:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 23 [2021-08-06 14:08:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:57,673 INFO L225 Difference]: With dead ends: 1122 [2021-08-06 14:08:57,673 INFO L226 Difference]: Without dead ends: 1122 [2021-08-06 14:08:57,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:08:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-08-06 14:08:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 897. [2021-08-06 14:08:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.338169642857143) internal successors, (2991), 896 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2991 transitions. [2021-08-06 14:08:57,700 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2991 transitions. Word has length 23 [2021-08-06 14:08:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:57,700 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 2991 transitions. [2021-08-06 14:08:57,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2991 transitions. [2021-08-06 14:08:57,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:08:57,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:57,704 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:57,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:57,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:57,917 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:57,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:57,917 INFO L82 PathProgramCache]: Analyzing trace with hash 456257100, now seen corresponding path program 11 times [2021-08-06 14:08:57,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:57,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772132283] [2021-08-06 14:08:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:57,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:57,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:57,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772132283] [2021-08-06 14:08:57,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772132283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:57,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207280899] [2021-08-06 14:08:57,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:08:57,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:57,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:57,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:57,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:08:58,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:08:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:58,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:08:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:58,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207280899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:58,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:58,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:08:58,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145432567] [2021-08-06 14:08:58,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:08:58,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:08:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:08:58,326 INFO L87 Difference]: Start difference. First operand 897 states and 2991 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:58,399 INFO L93 Difference]: Finished difference Result 1122 states and 3556 transitions. [2021-08-06 14:08:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:08:58,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 23 [2021-08-06 14:08:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:58,404 INFO L225 Difference]: With dead ends: 1122 [2021-08-06 14:08:58,405 INFO L226 Difference]: Without dead ends: 1116 [2021-08-06 14:08:58,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:08:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-06 14:08:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 920. [2021-08-06 14:08:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.309031556039173) internal successors, (3041), 919 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3041 transitions. [2021-08-06 14:08:58,432 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3041 transitions. Word has length 23 [2021-08-06 14:08:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:58,432 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 3041 transitions. [2021-08-06 14:08:58,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3041 transitions. [2021-08-06 14:08:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:08:58,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:58,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:58,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:58,657 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,SelfDestructingSolverStorable20 [2021-08-06 14:08:58,657 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1608804944, now seen corresponding path program 12 times [2021-08-06 14:08:58,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:58,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434881873] [2021-08-06 14:08:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:58,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:08:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:08:58,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:08:58,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434881873] [2021-08-06 14:08:58,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434881873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:58,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407836338] [2021-08-06 14:08:58,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:08:58,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:58,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:08:58,708 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:08:58,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:08:58,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:08:58,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:08:58,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:08:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:08:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:08:59,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407836338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:08:59,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:08:59,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-06 14:08:59,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661914907] [2021-08-06 14:08:59,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:08:59,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:08:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:08:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:08:59,100 INFO L87 Difference]: Start difference. First operand 920 states and 3041 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:08:59,693 INFO L93 Difference]: Finished difference Result 3250 states and 10076 transitions. [2021-08-06 14:08:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 14:08:59,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:08:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:08:59,707 INFO L225 Difference]: With dead ends: 3250 [2021-08-06 14:08:59,708 INFO L226 Difference]: Without dead ends: 3204 [2021-08-06 14:08:59,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=378, Invalid=1262, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 14:08:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-08-06 14:08:59,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 1423. [2021-08-06 14:08:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.4971870604781996) internal successors, (4973), 1422 states have internal predecessors, (4973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4973 transitions. [2021-08-06 14:08:59,760 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4973 transitions. Word has length 23 [2021-08-06 14:08:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:08:59,760 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 4973 transitions. [2021-08-06 14:08:59,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:08:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4973 transitions. [2021-08-06 14:08:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:08:59,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:08:59,764 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:08:59,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:08:59,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:08:59,981 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:08:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:08:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1526508494, now seen corresponding path program 13 times [2021-08-06 14:08:59,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:08:59,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774294757] [2021-08-06 14:08:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:08:59,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:08:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:00,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:00,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774294757] [2021-08-06 14:09:00,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774294757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:00,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84886175] [2021-08-06 14:09:00,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:09:00,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:00,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:00,020 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:00,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 14:09:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:00,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:00,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84886175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:00,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:00,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:09:00,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457155111] [2021-08-06 14:09:00,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:09:00,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:09:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:09:00,382 INFO L87 Difference]: Start difference. First operand 1423 states and 4973 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-08-06 14:09:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:00,461 INFO L93 Difference]: Finished difference Result 2423 states and 8285 transitions. [2021-08-06 14:09:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:09:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) Word has length 23 [2021-08-06 14:09:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:00,476 INFO L225 Difference]: With dead ends: 2423 [2021-08-06 14:09:00,476 INFO L226 Difference]: Without dead ends: 2423 [2021-08-06 14:09:00,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-08-06 14:09:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1826. [2021-08-06 14:09:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.6115068493150684) internal successors, (6591), 1825 states have internal predecessors, (6591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6591 transitions. [2021-08-06 14:09:00,533 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6591 transitions. Word has length 23 [2021-08-06 14:09:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:00,534 INFO L470 AbstractCegarLoop]: Abstraction has 1826 states and 6591 transitions. [2021-08-06 14:09:00,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-08-06 14:09:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6591 transitions. [2021-08-06 14:09:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:09:00,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:00,539 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:00,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:00,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:00,753 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 18908238, now seen corresponding path program 14 times [2021-08-06 14:09:00,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:00,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024938676] [2021-08-06 14:09:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:00,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:00,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:00,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024938676] [2021-08-06 14:09:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024938676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:00,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78879091] [2021-08-06 14:09:00,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:00,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:00,791 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:00,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 14:09:00,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:00,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:01,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:01,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:01,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78879091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:01,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:01,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 14:09:01,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471430272] [2021-08-06 14:09:01,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:01,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:01,165 INFO L87 Difference]: Start difference. First operand 1826 states and 6591 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:01,792 INFO L93 Difference]: Finished difference Result 4449 states and 15016 transitions. [2021-08-06 14:09:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:09:01,793 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:09:01,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:01,808 INFO L225 Difference]: With dead ends: 4449 [2021-08-06 14:09:01,808 INFO L226 Difference]: Without dead ends: 4216 [2021-08-06 14:09:01,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:09:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4216 states. [2021-08-06 14:09:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4216 to 3042. [2021-08-06 14:09:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3041 states have (on average 3.6797106215060835) internal successors, (11190), 3041 states have internal predecessors, (11190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 11190 transitions. [2021-08-06 14:09:01,910 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 11190 transitions. Word has length 23 [2021-08-06 14:09:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:01,910 INFO L470 AbstractCegarLoop]: Abstraction has 3042 states and 11190 transitions. [2021-08-06 14:09:01,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 11190 transitions. [2021-08-06 14:09:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:09:01,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:01,939 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:01,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:02,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 14:09:02,157 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:02,157 INFO L82 PathProgramCache]: Analyzing trace with hash -593433466, now seen corresponding path program 15 times [2021-08-06 14:09:02,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:02,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119853871] [2021-08-06 14:09:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:02,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:02,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:02,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119853871] [2021-08-06 14:09:02,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119853871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:02,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819371472] [2021-08-06 14:09:02,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:02,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:02,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:02,217 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:02,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 14:09:02,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:09:02,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:02,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:02,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:02,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819371472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:02,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:02,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 14:09:02,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463676294] [2021-08-06 14:09:02,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:02,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:02,568 INFO L87 Difference]: Start difference. First operand 3042 states and 11190 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:03,093 INFO L93 Difference]: Finished difference Result 7590 states and 25931 transitions. [2021-08-06 14:09:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:09:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:09:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:03,124 INFO L225 Difference]: With dead ends: 7590 [2021-08-06 14:09:03,124 INFO L226 Difference]: Without dead ends: 7369 [2021-08-06 14:09:03,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:09:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7369 states. [2021-08-06 14:09:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7369 to 5045. [2021-08-06 14:09:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 5044 states have (on average 3.6867565424266453) internal successors, (18596), 5044 states have internal predecessors, (18596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 18596 transitions. [2021-08-06 14:09:03,321 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 18596 transitions. Word has length 23 [2021-08-06 14:09:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:03,322 INFO L470 AbstractCegarLoop]: Abstraction has 5045 states and 18596 transitions. [2021-08-06 14:09:03,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 18596 transitions. [2021-08-06 14:09:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:09:03,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:03,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:03,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:03,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:03,549 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash -712649734, now seen corresponding path program 16 times [2021-08-06 14:09:03,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:03,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936935496] [2021-08-06 14:09:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:03,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:03,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:03,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936935496] [2021-08-06 14:09:03,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936935496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:03,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730195678] [2021-08-06 14:09:03,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:03,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:03,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:03,589 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:03,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 14:09:03,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:03,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730195678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:03,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:03,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:09:03,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997425414] [2021-08-06 14:09:03,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:09:03,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:09:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:09:03,933 INFO L87 Difference]: Start difference. First operand 5045 states and 18596 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-08-06 14:09:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:04,057 INFO L93 Difference]: Finished difference Result 5862 states and 20853 transitions. [2021-08-06 14:09:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:09:04,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) Word has length 23 [2021-08-06 14:09:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:04,075 INFO L225 Difference]: With dead ends: 5862 [2021-08-06 14:09:04,076 INFO L226 Difference]: Without dead ends: 5818 [2021-08-06 14:09:04,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2021-08-06 14:09:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 5115. [2021-08-06 14:09:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 5114 states have (on average 3.681853734845522) internal successors, (18829), 5114 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 18829 transitions. [2021-08-06 14:09:04,217 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 18829 transitions. Word has length 23 [2021-08-06 14:09:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:04,217 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 18829 transitions. [2021-08-06 14:09:04,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-08-06 14:09:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 18829 transitions. [2021-08-06 14:09:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:09:04,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:04,229 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:04,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:04,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:04,452 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:04,452 INFO L82 PathProgramCache]: Analyzing trace with hash -974522626, now seen corresponding path program 17 times [2021-08-06 14:09:04,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:04,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618737418] [2021-08-06 14:09:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:04,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:04,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:04,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618737418] [2021-08-06 14:09:04,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618737418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:04,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857552180] [2021-08-06 14:09:04,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:04,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:04,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:04,487 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:04,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 14:09:04,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:04,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:04,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:04,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:04,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857552180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:04,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:04,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-06 14:09:04,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664858828] [2021-08-06 14:09:04,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:09:04,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:09:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:04,913 INFO L87 Difference]: Start difference. First operand 5115 states and 18829 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:05,423 INFO L93 Difference]: Finished difference Result 9085 states and 31411 transitions. [2021-08-06 14:09:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 14:09:05,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:09:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:05,445 INFO L225 Difference]: With dead ends: 9085 [2021-08-06 14:09:05,445 INFO L226 Difference]: Without dead ends: 9018 [2021-08-06 14:09:05,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 14:09:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9018 states. [2021-08-06 14:09:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9018 to 6111. [2021-08-06 14:09:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6111 states, 6110 states have (on average 3.7032733224222585) internal successors, (22627), 6110 states have internal predecessors, (22627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 22627 transitions. [2021-08-06 14:09:05,622 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 22627 transitions. Word has length 23 [2021-08-06 14:09:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:05,622 INFO L470 AbstractCegarLoop]: Abstraction has 6111 states and 22627 transitions. [2021-08-06 14:09:05,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 22627 transitions. [2021-08-06 14:09:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:09:05,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:05,637 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:05,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-06 14:09:05,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:05,853 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1591412358, now seen corresponding path program 18 times [2021-08-06 14:09:05,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:05,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967479419] [2021-08-06 14:09:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:05,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:05,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:05,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967479419] [2021-08-06 14:09:05,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967479419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:05,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255915830] [2021-08-06 14:09:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:05,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:05,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:05,944 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:05,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 14:09:06,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:09:06,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:06,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255915830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:06,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:06,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-06 14:09:06,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597685646] [2021-08-06 14:09:06,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:06,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:06,328 INFO L87 Difference]: Start difference. First operand 6111 states and 22627 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:06,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:06,855 INFO L93 Difference]: Finished difference Result 10351 states and 36235 transitions. [2021-08-06 14:09:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:09:06,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:09:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:06,883 INFO L225 Difference]: With dead ends: 10351 [2021-08-06 14:09:06,883 INFO L226 Difference]: Without dead ends: 10301 [2021-08-06 14:09:06,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:09:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10301 states. [2021-08-06 14:09:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10301 to 7238. [2021-08-06 14:09:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7238 states, 7237 states have (on average 3.7315185850490535) internal successors, (27005), 7237 states have internal predecessors, (27005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 27005 transitions. [2021-08-06 14:09:07,107 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 27005 transitions. Word has length 23 [2021-08-06 14:09:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:07,107 INFO L470 AbstractCegarLoop]: Abstraction has 7238 states and 27005 transitions. [2021-08-06 14:09:07,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 27005 transitions. [2021-08-06 14:09:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:09:07,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:07,124 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:07,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:07,336 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,SelfDestructingSolverStorable27 [2021-08-06 14:09:07,337 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash -918016754, now seen corresponding path program 19 times [2021-08-06 14:09:07,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:07,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060777800] [2021-08-06 14:09:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:07,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:07,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:07,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060777800] [2021-08-06 14:09:07,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060777800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:07,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132803476] [2021-08-06 14:09:07,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:09:07,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:07,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:07,388 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:07,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 14:09:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:07,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:07,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:07,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132803476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:07,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:07,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:09:07,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613750198] [2021-08-06 14:09:07,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:09:07,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:07,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:09:07,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:09:07,747 INFO L87 Difference]: Start difference. First operand 7238 states and 27005 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:07,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:07,883 INFO L93 Difference]: Finished difference Result 8722 states and 31576 transitions. [2021-08-06 14:09:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:09:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:09:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:07,901 INFO L225 Difference]: With dead ends: 8722 [2021-08-06 14:09:07,901 INFO L226 Difference]: Without dead ends: 8710 [2021-08-06 14:09:07,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2021-08-06 14:09:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 7377. [2021-08-06 14:09:08,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7377 states, 7376 states have (on average 3.728579175704989) internal successors, (27502), 7376 states have internal predecessors, (27502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7377 states to 7377 states and 27502 transitions. [2021-08-06 14:09:08,066 INFO L78 Accepts]: Start accepts. Automaton has 7377 states and 27502 transitions. Word has length 23 [2021-08-06 14:09:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:08,066 INFO L470 AbstractCegarLoop]: Abstraction has 7377 states and 27502 transitions. [2021-08-06 14:09:08,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 7377 states and 27502 transitions. [2021-08-06 14:09:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:09:08,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:08,084 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:08,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:08,294 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,SelfDestructingSolverStorable28 [2021-08-06 14:09:08,294 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:08,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1342327990, now seen corresponding path program 20 times [2021-08-06 14:09:08,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:08,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928120191] [2021-08-06 14:09:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:08,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:08,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:08,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928120191] [2021-08-06 14:09:08,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928120191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:08,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209780794] [2021-08-06 14:09:08,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:08,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:08,333 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:08,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 14:09:08,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:08,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:08,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:08,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209780794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:08,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:08,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-06 14:09:08,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569345095] [2021-08-06 14:09:08,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:09:08,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:08,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:09:08,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:08,722 INFO L87 Difference]: Start difference. First operand 7377 states and 27502 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:09,257 INFO L93 Difference]: Finished difference Result 13120 states and 46643 transitions. [2021-08-06 14:09:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:09:09,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 23 [2021-08-06 14:09:09,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:09,291 INFO L225 Difference]: With dead ends: 13120 [2021-08-06 14:09:09,292 INFO L226 Difference]: Without dead ends: 13088 [2021-08-06 14:09:09,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:09:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-08-06 14:09:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 9843. [2021-08-06 14:09:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9843 states, 9842 states have (on average 3.742328794960374) internal successors, (36832), 9842 states have internal predecessors, (36832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9843 states to 9843 states and 36832 transitions. [2021-08-06 14:09:09,604 INFO L78 Accepts]: Start accepts. Automaton has 9843 states and 36832 transitions. Word has length 23 [2021-08-06 14:09:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:09,605 INFO L470 AbstractCegarLoop]: Abstraction has 9843 states and 36832 transitions. [2021-08-06 14:09:09,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 9843 states and 36832 transitions. [2021-08-06 14:09:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:09:09,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:09,625 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:09,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:09,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:09,826 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:09,871 INFO L82 PathProgramCache]: Analyzing trace with hash 778321758, now seen corresponding path program 21 times [2021-08-06 14:09:09,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:09,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988669227] [2021-08-06 14:09:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:09,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:09,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:09,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988669227] [2021-08-06 14:09:09,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988669227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:09,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819147261] [2021-08-06 14:09:09,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:09,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:09,909 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:09,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 14:09:10,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:09:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:10,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:10,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819147261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:10,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:10,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 14:09:10,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006489820] [2021-08-06 14:09:10,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:09:10,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:09:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:09:10,330 INFO L87 Difference]: Start difference. First operand 9843 states and 36832 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-08-06 14:09:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:10,498 INFO L93 Difference]: Finished difference Result 11730 states and 42618 transitions. [2021-08-06 14:09:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:09:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) Word has length 23 [2021-08-06 14:09:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:10,561 INFO L225 Difference]: With dead ends: 11730 [2021-08-06 14:09:10,561 INFO L226 Difference]: Without dead ends: 11680 [2021-08-06 14:09:10,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:09:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11680 states. [2021-08-06 14:09:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11680 to 9785. [2021-08-06 14:09:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9785 states, 9784 states have (on average 3.721381847914963) internal successors, (36410), 9784 states have internal predecessors, (36410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9785 states to 9785 states and 36410 transitions. [2021-08-06 14:09:10,756 INFO L78 Accepts]: Start accepts. Automaton has 9785 states and 36410 transitions. Word has length 23 [2021-08-06 14:09:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:10,756 INFO L470 AbstractCegarLoop]: Abstraction has 9785 states and 36410 transitions. [2021-08-06 14:09:10,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-08-06 14:09:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9785 states and 36410 transitions. [2021-08-06 14:09:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 14:09:10,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:10,775 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:10,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:10,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:10,977 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:10,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1875112408, now seen corresponding path program 22 times [2021-08-06 14:09:10,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:10,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231114868] [2021-08-06 14:09:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:10,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:11,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:11,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231114868] [2021-08-06 14:09:11,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231114868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:11,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229874884] [2021-08-06 14:09:11,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:11,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:11,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:11,016 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:11,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:09:11,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:11,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:11,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:11,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:11,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229874884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:11,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:11,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:09:11,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497467113] [2021-08-06 14:09:11,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:09:11,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:09:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:09:11,468 INFO L87 Difference]: Start difference. First operand 9785 states and 36410 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-08-06 14:09:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:11,588 INFO L93 Difference]: Finished difference Result 14833 states and 53823 transitions. [2021-08-06 14:09:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:09:11,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) Word has length 25 [2021-08-06 14:09:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:11,630 INFO L225 Difference]: With dead ends: 14833 [2021-08-06 14:09:11,630 INFO L226 Difference]: Without dead ends: 14819 [2021-08-06 14:09:11,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:09:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14819 states. [2021-08-06 14:09:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14819 to 12344. [2021-08-06 14:09:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12344 states, 12343 states have (on average 3.7569472575548892) internal successors, (46372), 12343 states have internal predecessors, (46372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12344 states to 12344 states and 46372 transitions. [2021-08-06 14:09:12,031 INFO L78 Accepts]: Start accepts. Automaton has 12344 states and 46372 transitions. Word has length 25 [2021-08-06 14:09:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:12,031 INFO L470 AbstractCegarLoop]: Abstraction has 12344 states and 46372 transitions. [2021-08-06 14:09:12,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-08-06 14:09:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 12344 states and 46372 transitions. [2021-08-06 14:09:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 14:09:12,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:12,053 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:12,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:12,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:12,254 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:12,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1895071392, now seen corresponding path program 23 times [2021-08-06 14:09:12,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:12,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777852009] [2021-08-06 14:09:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:12,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:12,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:12,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777852009] [2021-08-06 14:09:12,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777852009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:12,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830200344] [2021-08-06 14:09:12,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:12,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:12,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:12,292 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:12,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:09:12,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:09:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:12,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:12,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830200344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:12,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:12,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 14:09:12,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954404041] [2021-08-06 14:09:12,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:09:12,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:12,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:09:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:09:12,757 INFO L87 Difference]: Start difference. First operand 12344 states and 46372 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-08-06 14:09:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:12,892 INFO L93 Difference]: Finished difference Result 14353 states and 52173 transitions. [2021-08-06 14:09:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:09:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) Word has length 25 [2021-08-06 14:09:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:12,933 INFO L225 Difference]: With dead ends: 14353 [2021-08-06 14:09:12,933 INFO L226 Difference]: Without dead ends: 14300 [2021-08-06 14:09:12,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:09:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14300 states. [2021-08-06 14:09:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14300 to 12313. [2021-08-06 14:09:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12313 states, 12312 states have (on average 3.7547920727745288) internal successors, (46229), 12312 states have internal predecessors, (46229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12313 states to 12313 states and 46229 transitions. [2021-08-06 14:09:13,315 INFO L78 Accepts]: Start accepts. Automaton has 12313 states and 46229 transitions. Word has length 25 [2021-08-06 14:09:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:13,315 INFO L470 AbstractCegarLoop]: Abstraction has 12313 states and 46229 transitions. [2021-08-06 14:09:13,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-08-06 14:09:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 12313 states and 46229 transitions. [2021-08-06 14:09:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 14:09:13,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:13,338 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:13,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 14:09:13,539 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,SelfDestructingSolverStorable32 [2021-08-06 14:09:13,539 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:13,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1021468140, now seen corresponding path program 24 times [2021-08-06 14:09:13,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:13,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794029078] [2021-08-06 14:09:13,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:13,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:13,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:13,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794029078] [2021-08-06 14:09:13,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794029078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:13,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951253805] [2021-08-06 14:09:13,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:13,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:13,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:13,580 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:13,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 14:09:13,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:09:13,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:13,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 14:09:13,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:14,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951253805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:14,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:14,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 14:09:14,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360409030] [2021-08-06 14:09:14,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:09:14,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:09:14,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:09:14,008 INFO L87 Difference]: Start difference. First operand 12313 states and 46229 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:14,516 INFO L93 Difference]: Finished difference Result 14970 states and 53856 transitions. [2021-08-06 14:09:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:09:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 25 [2021-08-06 14:09:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:14,555 INFO L225 Difference]: With dead ends: 14970 [2021-08-06 14:09:14,555 INFO L226 Difference]: Without dead ends: 14797 [2021-08-06 14:09:14,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:09:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14797 states. [2021-08-06 14:09:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14797 to 12485. [2021-08-06 14:09:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12485 states, 12484 states have (on average 3.7471964114066005) internal successors, (46780), 12484 states have internal predecessors, (46780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12485 states to 12485 states and 46780 transitions. [2021-08-06 14:09:14,840 INFO L78 Accepts]: Start accepts. Automaton has 12485 states and 46780 transitions. Word has length 25 [2021-08-06 14:09:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:14,840 INFO L470 AbstractCegarLoop]: Abstraction has 12485 states and 46780 transitions. [2021-08-06 14:09:14,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 12485 states and 46780 transitions. [2021-08-06 14:09:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:14,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:14,863 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:14,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 14:09:15,064 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,SelfDestructingSolverStorable33 [2021-08-06 14:09:15,064 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:15,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1240654612, now seen corresponding path program 25 times [2021-08-06 14:09:15,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:15,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485140039] [2021-08-06 14:09:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:15,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:15,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:15,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485140039] [2021-08-06 14:09:15,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485140039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:15,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778383592] [2021-08-06 14:09:15,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:09:15,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:15,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:15,274 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:15,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 14:09:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:15,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:15,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:16,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778383592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:16,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:16,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:09:16,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213943043] [2021-08-06 14:09:16,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:09:16,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:09:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:16,118 INFO L87 Difference]: Start difference. First operand 12485 states and 46780 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:16,326 INFO L93 Difference]: Finished difference Result 14312 states and 52430 transitions. [2021-08-06 14:09:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:09:16,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:16,366 INFO L225 Difference]: With dead ends: 14312 [2021-08-06 14:09:16,366 INFO L226 Difference]: Without dead ends: 14242 [2021-08-06 14:09:16,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14242 states. [2021-08-06 14:09:16,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14242 to 13241. [2021-08-06 14:09:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13241 states, 13240 states have (on average 3.7401812688821754) internal successors, (49520), 13240 states have internal predecessors, (49520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13241 states to 13241 states and 49520 transitions. [2021-08-06 14:09:16,771 INFO L78 Accepts]: Start accepts. Automaton has 13241 states and 49520 transitions. Word has length 27 [2021-08-06 14:09:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:16,771 INFO L470 AbstractCegarLoop]: Abstraction has 13241 states and 49520 transitions. [2021-08-06 14:09:16,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 13241 states and 49520 transitions. [2021-08-06 14:09:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:16,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:16,805 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:16,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-06 14:09:17,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 14:09:17,006 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash -735077948, now seen corresponding path program 26 times [2021-08-06 14:09:17,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:17,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330554032] [2021-08-06 14:09:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:17,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:17,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:17,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330554032] [2021-08-06 14:09:17,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330554032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:17,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845854901] [2021-08-06 14:09:17,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:17,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:17,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:17,130 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:17,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 14:09:17,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:17,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:17,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:18,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845854901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:18,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:18,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:18,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311874043] [2021-08-06 14:09:18,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:18,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:18,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:18,020 INFO L87 Difference]: Start difference. First operand 13241 states and 49520 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:18,327 INFO L93 Difference]: Finished difference Result 14194 states and 52397 transitions. [2021-08-06 14:09:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:18,364 INFO L225 Difference]: With dead ends: 14194 [2021-08-06 14:09:18,365 INFO L226 Difference]: Without dead ends: 14164 [2021-08-06 14:09:18,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14164 states. [2021-08-06 14:09:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14164 to 13551. [2021-08-06 14:09:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13551 states, 13550 states have (on average 3.7387453874538745) internal successors, (50660), 13550 states have internal predecessors, (50660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13551 states to 13551 states and 50660 transitions. [2021-08-06 14:09:18,645 INFO L78 Accepts]: Start accepts. Automaton has 13551 states and 50660 transitions. Word has length 27 [2021-08-06 14:09:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:18,646 INFO L470 AbstractCegarLoop]: Abstraction has 13551 states and 50660 transitions. [2021-08-06 14:09:18,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13551 states and 50660 transitions. [2021-08-06 14:09:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:18,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:18,679 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:18,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:18,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:18,903 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash -699772612, now seen corresponding path program 27 times [2021-08-06 14:09:18,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:18,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49291297] [2021-08-06 14:09:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:18,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:18,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:18,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49291297] [2021-08-06 14:09:18,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49291297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:18,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015627841] [2021-08-06 14:09:18,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:18,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:18,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:19,000 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:19,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 14:09:19,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:09:19,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:19,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:19,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:19,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015627841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:19,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:19,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:19,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14271372] [2021-08-06 14:09:19,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:19,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:19,814 INFO L87 Difference]: Start difference. First operand 13551 states and 50660 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:20,089 INFO L93 Difference]: Finished difference Result 14425 states and 53320 transitions. [2021-08-06 14:09:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:20,131 INFO L225 Difference]: With dead ends: 14425 [2021-08-06 14:09:20,131 INFO L226 Difference]: Without dead ends: 14395 [2021-08-06 14:09:20,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14395 states. [2021-08-06 14:09:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14395 to 13830. [2021-08-06 14:09:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13830 states, 13829 states have (on average 3.737218887844385) internal successors, (51682), 13829 states have internal predecessors, (51682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13830 states to 13830 states and 51682 transitions. [2021-08-06 14:09:20,473 INFO L78 Accepts]: Start accepts. Automaton has 13830 states and 51682 transitions. Word has length 27 [2021-08-06 14:09:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:20,473 INFO L470 AbstractCegarLoop]: Abstraction has 13830 states and 51682 transitions. [2021-08-06 14:09:20,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 13830 states and 51682 transitions. [2021-08-06 14:09:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:20,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:20,500 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:20,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 14:09:20,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 14:09:20,701 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:20,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1612841472, now seen corresponding path program 28 times [2021-08-06 14:09:20,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:20,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998983563] [2021-08-06 14:09:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:20,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:20,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:20,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998983563] [2021-08-06 14:09:20,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998983563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:20,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781941165] [2021-08-06 14:09:20,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:20,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:20,819 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:20,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 14:09:21,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:21,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781941165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:21,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:21,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:21,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471482105] [2021-08-06 14:09:21,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:21,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:21,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:21,733 INFO L87 Difference]: Start difference. First operand 13830 states and 51682 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:21,944 INFO L93 Difference]: Finished difference Result 14736 states and 54323 transitions. [2021-08-06 14:09:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:21,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:21,981 INFO L225 Difference]: With dead ends: 14736 [2021-08-06 14:09:21,981 INFO L226 Difference]: Without dead ends: 14690 [2021-08-06 14:09:21,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:21,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14690 states. [2021-08-06 14:09:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14690 to 14060. [2021-08-06 14:09:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14060 states, 14059 states have (on average 3.734547265097091) internal successors, (52504), 14059 states have internal predecessors, (52504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14060 states to 14060 states and 52504 transitions. [2021-08-06 14:09:22,385 INFO L78 Accepts]: Start accepts. Automaton has 14060 states and 52504 transitions. Word has length 27 [2021-08-06 14:09:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:22,385 INFO L470 AbstractCegarLoop]: Abstraction has 14060 states and 52504 transitions. [2021-08-06 14:09:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 14060 states and 52504 transitions. [2021-08-06 14:09:22,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:22,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:22,410 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:22,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:22,610 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,SelfDestructingSolverStorable37 [2021-08-06 14:09:22,610 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:22,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:22,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1062035200, now seen corresponding path program 29 times [2021-08-06 14:09:22,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:22,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550964896] [2021-08-06 14:09:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:22,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:22,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:22,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550964896] [2021-08-06 14:09:22,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550964896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:22,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699310137] [2021-08-06 14:09:22,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:22,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:22,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:22,721 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:22,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 14:09:23,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:09:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:23,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699310137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:23,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:23,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:09:23,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014423914] [2021-08-06 14:09:23,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:09:23,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:09:23,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:23,601 INFO L87 Difference]: Start difference. First operand 14060 states and 52504 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:23,837 INFO L93 Difference]: Finished difference Result 15719 states and 57562 transitions. [2021-08-06 14:09:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:09:23,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:23,896 INFO L225 Difference]: With dead ends: 15719 [2021-08-06 14:09:23,896 INFO L226 Difference]: Without dead ends: 15679 [2021-08-06 14:09:23,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15679 states. [2021-08-06 14:09:24,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15679 to 14603. [2021-08-06 14:09:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14603 states, 14602 states have (on average 3.732296945623887) internal successors, (54499), 14602 states have internal predecessors, (54499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14603 states to 14603 states and 54499 transitions. [2021-08-06 14:09:24,402 INFO L78 Accepts]: Start accepts. Automaton has 14603 states and 54499 transitions. Word has length 27 [2021-08-06 14:09:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:24,402 INFO L470 AbstractCegarLoop]: Abstraction has 14603 states and 54499 transitions. [2021-08-06 14:09:24,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 14603 states and 54499 transitions. [2021-08-06 14:09:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:24,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:24,431 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:24,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:24,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 14:09:24,632 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1241990722, now seen corresponding path program 30 times [2021-08-06 14:09:24,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:24,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079638622] [2021-08-06 14:09:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:24,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:24,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:24,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079638622] [2021-08-06 14:09:24,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079638622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:24,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707274859] [2021-08-06 14:09:24,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:24,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:24,738 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:24,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 14:09:25,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:09:25,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:25,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:25,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:25,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707274859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:25,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:25,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:25,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768289575] [2021-08-06 14:09:25,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:25,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:25,600 INFO L87 Difference]: Start difference. First operand 14603 states and 54499 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:25,817 INFO L93 Difference]: Finished difference Result 15248 states and 56387 transitions. [2021-08-06 14:09:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:25,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:25,872 INFO L225 Difference]: With dead ends: 15248 [2021-08-06 14:09:25,872 INFO L226 Difference]: Without dead ends: 15103 [2021-08-06 14:09:25,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-08-06 14:09:26,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 14777. [2021-08-06 14:09:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14777 states, 14776 states have (on average 3.730914997292907) internal successors, (55128), 14776 states have internal predecessors, (55128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14777 states to 14777 states and 55128 transitions. [2021-08-06 14:09:26,335 INFO L78 Accepts]: Start accepts. Automaton has 14777 states and 55128 transitions. Word has length 27 [2021-08-06 14:09:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:26,335 INFO L470 AbstractCegarLoop]: Abstraction has 14777 states and 55128 transitions. [2021-08-06 14:09:26,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 14777 states and 55128 transitions. [2021-08-06 14:09:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:26,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:26,366 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:26,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:26,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 14:09:26,566 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:26,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1777023434, now seen corresponding path program 31 times [2021-08-06 14:09:26,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:26,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279430153] [2021-08-06 14:09:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:26,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:26,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:26,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279430153] [2021-08-06 14:09:26,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279430153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:26,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744710866] [2021-08-06 14:09:26,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:09:26,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:26,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:26,672 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:26,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 14:09:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:27,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:27,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744710866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:27,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:27,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:27,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602552330] [2021-08-06 14:09:27,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:27,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:27,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:27,692 INFO L87 Difference]: Start difference. First operand 14777 states and 55128 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:27,910 INFO L93 Difference]: Finished difference Result 15560 states and 57449 transitions. [2021-08-06 14:09:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:27,954 INFO L225 Difference]: With dead ends: 15560 [2021-08-06 14:09:27,954 INFO L226 Difference]: Without dead ends: 15530 [2021-08-06 14:09:27,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:27,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15530 states. [2021-08-06 14:09:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15530 to 14903. [2021-08-06 14:09:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14903 states, 14902 states have (on average 3.7329217554690644) internal successors, (55628), 14902 states have internal predecessors, (55628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14903 states to 14903 states and 55628 transitions. [2021-08-06 14:09:28,382 INFO L78 Accepts]: Start accepts. Automaton has 14903 states and 55628 transitions. Word has length 27 [2021-08-06 14:09:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:28,382 INFO L470 AbstractCegarLoop]: Abstraction has 14903 states and 55628 transitions. [2021-08-06 14:09:28,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 14903 states and 55628 transitions. [2021-08-06 14:09:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:28,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:28,409 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:28,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 14:09:28,610 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,SelfDestructingSolverStorable40 [2021-08-06 14:09:28,610 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:28,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:28,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1260332730, now seen corresponding path program 32 times [2021-08-06 14:09:28,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:28,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079390973] [2021-08-06 14:09:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:28,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:28,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:28,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079390973] [2021-08-06 14:09:28,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079390973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:28,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729108850] [2021-08-06 14:09:28,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:28,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:28,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:28,708 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:28,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 14:09:29,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:29,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:29,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:29,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729108850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:29,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:29,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:29,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207875311] [2021-08-06 14:09:29,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:29,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:29,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:29,647 INFO L87 Difference]: Start difference. First operand 14903 states and 55628 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:29,828 INFO L93 Difference]: Finished difference Result 15526 states and 57468 transitions. [2021-08-06 14:09:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:29,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:29,869 INFO L225 Difference]: With dead ends: 15526 [2021-08-06 14:09:29,869 INFO L226 Difference]: Without dead ends: 15438 [2021-08-06 14:09:29,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15438 states. [2021-08-06 14:09:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15438 to 15134. [2021-08-06 14:09:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15134 states, 15133 states have (on average 3.7258309654397674) internal successors, (56383), 15133 states have internal predecessors, (56383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15134 states to 15134 states and 56383 transitions. [2021-08-06 14:09:30,247 INFO L78 Accepts]: Start accepts. Automaton has 15134 states and 56383 transitions. Word has length 27 [2021-08-06 14:09:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:30,248 INFO L470 AbstractCegarLoop]: Abstraction has 15134 states and 56383 transitions. [2021-08-06 14:09:30,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15134 states and 56383 transitions. [2021-08-06 14:09:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:30,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:30,276 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:30,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 14:09:30,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:30,477 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:30,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1455016062, now seen corresponding path program 33 times [2021-08-06 14:09:30,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:30,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059137176] [2021-08-06 14:09:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:30,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:30,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:30,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059137176] [2021-08-06 14:09:30,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059137176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:30,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87861177] [2021-08-06 14:09:30,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:30,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:30,584 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:30,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 14:09:31,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:09:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:31,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:31,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87861177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:31,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:31,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:09:31,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969301983] [2021-08-06 14:09:31,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:09:31,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:09:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:31,549 INFO L87 Difference]: Start difference. First operand 15134 states and 56383 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:31,879 INFO L93 Difference]: Finished difference Result 17732 states and 64825 transitions. [2021-08-06 14:09:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:09:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:31,934 INFO L225 Difference]: With dead ends: 17732 [2021-08-06 14:09:31,935 INFO L226 Difference]: Without dead ends: 17624 [2021-08-06 14:09:31,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17624 states. [2021-08-06 14:09:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17624 to 16048. [2021-08-06 14:09:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16048 states, 16047 states have (on average 3.740823829999377) internal successors, (60029), 16047 states have internal predecessors, (60029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16048 states to 16048 states and 60029 transitions. [2021-08-06 14:09:32,315 INFO L78 Accepts]: Start accepts. Automaton has 16048 states and 60029 transitions. Word has length 27 [2021-08-06 14:09:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:32,315 INFO L470 AbstractCegarLoop]: Abstraction has 16048 states and 60029 transitions. [2021-08-06 14:09:32,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16048 states and 60029 transitions. [2021-08-06 14:09:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:32,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:32,347 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:32,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:32,547 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,SelfDestructingSolverStorable42 [2021-08-06 14:09:32,547 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1151333050, now seen corresponding path program 34 times [2021-08-06 14:09:32,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:32,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780154887] [2021-08-06 14:09:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:32,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:32,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:32,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780154887] [2021-08-06 14:09:32,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780154887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:32,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932787267] [2021-08-06 14:09:32,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:32,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:32,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:32,660 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:32,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 14:09:33,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:33,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932787267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:33,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:33,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:33,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746259524] [2021-08-06 14:09:33,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:33,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:33,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:33,619 INFO L87 Difference]: Start difference. First operand 16048 states and 60029 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:33,853 INFO L93 Difference]: Finished difference Result 16810 states and 62301 transitions. [2021-08-06 14:09:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:33,904 INFO L225 Difference]: With dead ends: 16810 [2021-08-06 14:09:33,905 INFO L226 Difference]: Without dead ends: 16705 [2021-08-06 14:09:33,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16705 states. [2021-08-06 14:09:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16705 to 16293. [2021-08-06 14:09:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16293 states, 16292 states have (on average 3.739442671249693) internal successors, (60923), 16292 states have internal predecessors, (60923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16293 states to 16293 states and 60923 transitions. [2021-08-06 14:09:34,251 INFO L78 Accepts]: Start accepts. Automaton has 16293 states and 60923 transitions. Word has length 27 [2021-08-06 14:09:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:34,251 INFO L470 AbstractCegarLoop]: Abstraction has 16293 states and 60923 transitions. [2021-08-06 14:09:34,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 16293 states and 60923 transitions. [2021-08-06 14:09:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:34,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:34,282 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:34,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 14:09:34,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:34,482 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1987580874, now seen corresponding path program 35 times [2021-08-06 14:09:34,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:34,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435651364] [2021-08-06 14:09:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:34,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:34,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:34,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435651364] [2021-08-06 14:09:34,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435651364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:34,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122845768] [2021-08-06 14:09:34,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:34,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:34,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:34,580 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:34,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 14:09:35,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:09:35,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:35,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:35,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122845768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:35,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:35,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:35,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719791873] [2021-08-06 14:09:35,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:35,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:35,668 INFO L87 Difference]: Start difference. First operand 16293 states and 60923 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:35,908 INFO L93 Difference]: Finished difference Result 17350 states and 64115 transitions. [2021-08-06 14:09:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:35,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:35,957 INFO L225 Difference]: With dead ends: 17350 [2021-08-06 14:09:35,957 INFO L226 Difference]: Without dead ends: 17274 [2021-08-06 14:09:35,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17274 states. [2021-08-06 14:09:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17274 to 16496. [2021-08-06 14:09:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16496 states, 16495 states have (on average 3.7399818126705062) internal successors, (61691), 16495 states have internal predecessors, (61691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16496 states to 16496 states and 61691 transitions. [2021-08-06 14:09:36,315 INFO L78 Accepts]: Start accepts. Automaton has 16496 states and 61691 transitions. Word has length 27 [2021-08-06 14:09:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:36,315 INFO L470 AbstractCegarLoop]: Abstraction has 16496 states and 61691 transitions. [2021-08-06 14:09:36,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:36,316 INFO L276 IsEmpty]: Start isEmpty. Operand 16496 states and 61691 transitions. [2021-08-06 14:09:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:36,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:36,346 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:36,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 14:09:36,546 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,SelfDestructingSolverStorable44 [2021-08-06 14:09:36,547 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:36,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1650438726, now seen corresponding path program 36 times [2021-08-06 14:09:36,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:36,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428210513] [2021-08-06 14:09:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:36,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:09:36,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:36,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428210513] [2021-08-06 14:09:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428210513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:36,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151650742] [2021-08-06 14:09:36,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:36,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:36,653 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:36,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 14:09:37,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:09:37,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:37,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151650742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:37,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:37,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:37,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138117906] [2021-08-06 14:09:37,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:37,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:37,690 INFO L87 Difference]: Start difference. First operand 16496 states and 61691 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:37,928 INFO L93 Difference]: Finished difference Result 17081 states and 63420 transitions. [2021-08-06 14:09:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:37,972 INFO L225 Difference]: With dead ends: 17081 [2021-08-06 14:09:37,972 INFO L226 Difference]: Without dead ends: 17015 [2021-08-06 14:09:37,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17015 states. [2021-08-06 14:09:38,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17015 to 16690. [2021-08-06 14:09:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16690 states, 16689 states have (on average 3.7389897537300016) internal successors, (62400), 16689 states have internal predecessors, (62400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16690 states to 16690 states and 62400 transitions. [2021-08-06 14:09:38,283 INFO L78 Accepts]: Start accepts. Automaton has 16690 states and 62400 transitions. Word has length 27 [2021-08-06 14:09:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:38,284 INFO L470 AbstractCegarLoop]: Abstraction has 16690 states and 62400 transitions. [2021-08-06 14:09:38,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:38,284 INFO L276 IsEmpty]: Start isEmpty. Operand 16690 states and 62400 transitions. [2021-08-06 14:09:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:38,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:38,314 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:38,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 14:09:38,514 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,SelfDestructingSolverStorable45 [2021-08-06 14:09:38,514 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash -314976114, now seen corresponding path program 37 times [2021-08-06 14:09:38,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:38,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294292696] [2021-08-06 14:09:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:38,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:38,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:38,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294292696] [2021-08-06 14:09:38,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294292696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:38,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687125650] [2021-08-06 14:09:38,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:09:38,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:38,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:38,633 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:38,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 14:09:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:39,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:39,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687125650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:39,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:39,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:39,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569049138] [2021-08-06 14:09:39,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:39,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:39,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:39,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:39,745 INFO L87 Difference]: Start difference. First operand 16690 states and 62400 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:39,957 INFO L93 Difference]: Finished difference Result 17364 states and 64430 transitions. [2021-08-06 14:09:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:40,001 INFO L225 Difference]: With dead ends: 17364 [2021-08-06 14:09:40,001 INFO L226 Difference]: Without dead ends: 17298 [2021-08-06 14:09:40,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17298 states. [2021-08-06 14:09:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17298 to 16904. [2021-08-06 14:09:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16904 states, 16903 states have (on average 3.7405194344199253) internal successors, (63226), 16903 states have internal predecessors, (63226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16904 states to 16904 states and 63226 transitions. [2021-08-06 14:09:40,400 INFO L78 Accepts]: Start accepts. Automaton has 16904 states and 63226 transitions. Word has length 27 [2021-08-06 14:09:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:40,400 INFO L470 AbstractCegarLoop]: Abstraction has 16904 states and 63226 transitions. [2021-08-06 14:09:40,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 16904 states and 63226 transitions. [2021-08-06 14:09:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:40,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:40,432 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:40,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:40,632 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,SelfDestructingSolverStorable46 [2021-08-06 14:09:40,632 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash 152422742, now seen corresponding path program 38 times [2021-08-06 14:09:40,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:40,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006299613] [2021-08-06 14:09:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:40,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:40,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:40,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006299613] [2021-08-06 14:09:40,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006299613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:40,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322927155] [2021-08-06 14:09:40,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:40,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:40,725 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:40,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 14:09:41,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:41,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:41,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322927155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:41,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:41,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:41,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521466942] [2021-08-06 14:09:41,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:41,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:41,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:41,816 INFO L87 Difference]: Start difference. First operand 16904 states and 63226 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:42,064 INFO L93 Difference]: Finished difference Result 17887 states and 66224 transitions. [2021-08-06 14:09:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:42,112 INFO L225 Difference]: With dead ends: 17887 [2021-08-06 14:09:42,112 INFO L226 Difference]: Without dead ends: 17857 [2021-08-06 14:09:42,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:42,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17857 states. [2021-08-06 14:09:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17857 to 17061. [2021-08-06 14:09:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17061 states, 17060 states have (on average 3.7441383352872215) internal successors, (63875), 17060 states have internal predecessors, (63875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17061 states to 17061 states and 63875 transitions. [2021-08-06 14:09:42,496 INFO L78 Accepts]: Start accepts. Automaton has 17061 states and 63875 transitions. Word has length 27 [2021-08-06 14:09:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:42,496 INFO L470 AbstractCegarLoop]: Abstraction has 17061 states and 63875 transitions. [2021-08-06 14:09:42,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 17061 states and 63875 transitions. [2021-08-06 14:09:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:42,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:42,528 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:42,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 14:09:42,729 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,SelfDestructingSolverStorable47 [2021-08-06 14:09:42,729 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:42,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:42,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1017639438, now seen corresponding path program 39 times [2021-08-06 14:09:42,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:42,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467262959] [2021-08-06 14:09:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:42,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:09:42,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:42,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467262959] [2021-08-06 14:09:42,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467262959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:42,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766901703] [2021-08-06 14:09:42,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:42,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:42,835 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:42,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 14:09:43,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:09:43,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:43,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:43,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766901703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:43,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:43,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:43,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185319106] [2021-08-06 14:09:43,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:43,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:43,955 INFO L87 Difference]: Start difference. First operand 17061 states and 63875 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:44,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:44,175 INFO L93 Difference]: Finished difference Result 18468 states and 68107 transitions. [2021-08-06 14:09:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:44,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:44,222 INFO L225 Difference]: With dead ends: 18468 [2021-08-06 14:09:44,222 INFO L226 Difference]: Without dead ends: 18406 [2021-08-06 14:09:44,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18406 states. [2021-08-06 14:09:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18406 to 17337. [2021-08-06 14:09:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17337 states, 17336 states have (on average 3.749134748500231) internal successors, (64995), 17336 states have internal predecessors, (64995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17337 states to 17337 states and 64995 transitions. [2021-08-06 14:09:44,588 INFO L78 Accepts]: Start accepts. Automaton has 17337 states and 64995 transitions. Word has length 27 [2021-08-06 14:09:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:44,588 INFO L470 AbstractCegarLoop]: Abstraction has 17337 states and 64995 transitions. [2021-08-06 14:09:44,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 17337 states and 64995 transitions. [2021-08-06 14:09:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:44,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:44,622 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:44,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 14:09:44,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 14:09:44,822 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2082462406, now seen corresponding path program 40 times [2021-08-06 14:09:44,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:44,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737178504] [2021-08-06 14:09:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:44,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:45,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:45,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737178504] [2021-08-06 14:09:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737178504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:45,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907391582] [2021-08-06 14:09:45,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:45,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:45,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:45,004 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:45,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 14:09:45,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:45,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:45,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:45,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:46,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907391582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:46,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:46,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:46,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311908608] [2021-08-06 14:09:46,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:46,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:46,239 INFO L87 Difference]: Start difference. First operand 17337 states and 64995 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:46,461 INFO L93 Difference]: Finished difference Result 18221 states and 67611 transitions. [2021-08-06 14:09:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:46,511 INFO L225 Difference]: With dead ends: 18221 [2021-08-06 14:09:46,511 INFO L226 Difference]: Without dead ends: 18191 [2021-08-06 14:09:46,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18191 states. [2021-08-06 14:09:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18191 to 17491. [2021-08-06 14:09:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17491 states, 17490 states have (on average 3.750371640937679) internal successors, (65594), 17490 states have internal predecessors, (65594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17491 states to 17491 states and 65594 transitions. [2021-08-06 14:09:46,867 INFO L78 Accepts]: Start accepts. Automaton has 17491 states and 65594 transitions. Word has length 27 [2021-08-06 14:09:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:46,867 INFO L470 AbstractCegarLoop]: Abstraction has 17491 states and 65594 transitions. [2021-08-06 14:09:46,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 17491 states and 65594 transitions. [2021-08-06 14:09:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:46,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:46,900 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:46,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 14:09:47,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 14:09:47,100 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash -783265718, now seen corresponding path program 41 times [2021-08-06 14:09:47,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:47,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65421253] [2021-08-06 14:09:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:47,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:47,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:47,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65421253] [2021-08-06 14:09:47,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65421253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:47,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59909641] [2021-08-06 14:09:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:09:47,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:47,203 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:47,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 14:09:48,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:09:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:48,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59909641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:48,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:48,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:48,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427809849] [2021-08-06 14:09:48,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:48,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:48,523 INFO L87 Difference]: Start difference. First operand 17491 states and 65594 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:48,693 INFO L93 Difference]: Finished difference Result 18204 states and 67682 transitions. [2021-08-06 14:09:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:48,740 INFO L225 Difference]: With dead ends: 18204 [2021-08-06 14:09:48,740 INFO L226 Difference]: Without dead ends: 18099 [2021-08-06 14:09:48,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2021-08-06 14:09:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 17688. [2021-08-06 14:09:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17688 states, 17687 states have (on average 3.748289704302595) internal successors, (66296), 17687 states have internal predecessors, (66296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17688 states to 17688 states and 66296 transitions. [2021-08-06 14:09:49,078 INFO L78 Accepts]: Start accepts. Automaton has 17688 states and 66296 transitions. Word has length 27 [2021-08-06 14:09:49,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:49,078 INFO L470 AbstractCegarLoop]: Abstraction has 17688 states and 66296 transitions. [2021-08-06 14:09:49,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:49,078 INFO L276 IsEmpty]: Start isEmpty. Operand 17688 states and 66296 transitions. [2021-08-06 14:09:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:49,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:49,109 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:49,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 14:09:49,310 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,SelfDestructingSolverStorable50 [2021-08-06 14:09:49,310 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1705053426, now seen corresponding path program 42 times [2021-08-06 14:09:49,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:49,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410270908] [2021-08-06 14:09:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:49,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:49,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:49,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410270908] [2021-08-06 14:09:49,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410270908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:49,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747112077] [2021-08-06 14:09:49,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:09:49,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:49,413 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:49,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 14:09:50,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:09:50,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:50,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747112077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:50,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:50,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:09:50,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171286881] [2021-08-06 14:09:50,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:09:50,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:09:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:50,686 INFO L87 Difference]: Start difference. First operand 17688 states and 66296 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:50,924 INFO L93 Difference]: Finished difference Result 20124 states and 73900 transitions. [2021-08-06 14:09:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:09:50,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:50,980 INFO L225 Difference]: With dead ends: 20124 [2021-08-06 14:09:50,980 INFO L226 Difference]: Without dead ends: 20072 [2021-08-06 14:09:50,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20072 states. [2021-08-06 14:09:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20072 to 18185. [2021-08-06 14:09:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18185 states, 18184 states have (on average 3.7596238451385835) internal successors, (68365), 18184 states have internal predecessors, (68365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18185 states to 18185 states and 68365 transitions. [2021-08-06 14:09:51,366 INFO L78 Accepts]: Start accepts. Automaton has 18185 states and 68365 transitions. Word has length 27 [2021-08-06 14:09:51,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:51,366 INFO L470 AbstractCegarLoop]: Abstraction has 18185 states and 68365 transitions. [2021-08-06 14:09:51,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 18185 states and 68365 transitions. [2021-08-06 14:09:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:51,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:51,404 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:51,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 14:09:51,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:51,609 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:51,609 INFO L82 PathProgramCache]: Analyzing trace with hash 469214414, now seen corresponding path program 43 times [2021-08-06 14:09:51,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:51,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830564796] [2021-08-06 14:09:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:51,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:51,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:51,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830564796] [2021-08-06 14:09:51,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830564796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:51,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492203140] [2021-08-06 14:09:51,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:09:51,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:51,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:51,724 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:51,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 14:09:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:52,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492203140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:52,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:52,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:52,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992559676] [2021-08-06 14:09:52,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:52,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:52,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:52,952 INFO L87 Difference]: Start difference. First operand 18185 states and 68365 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:53,212 INFO L93 Difference]: Finished difference Result 18576 states and 69494 transitions. [2021-08-06 14:09:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:09:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:53,264 INFO L225 Difference]: With dead ends: 18576 [2021-08-06 14:09:53,264 INFO L226 Difference]: Without dead ends: 18546 [2021-08-06 14:09:53,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18546 states. [2021-08-06 14:09:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18546 to 18253. [2021-08-06 14:09:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18253 states, 18252 states have (on average 3.7587661626123166) internal successors, (68605), 18252 states have internal predecessors, (68605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18253 states to 18253 states and 68605 transitions. [2021-08-06 14:09:53,642 INFO L78 Accepts]: Start accepts. Automaton has 18253 states and 68605 transitions. Word has length 27 [2021-08-06 14:09:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:53,642 INFO L470 AbstractCegarLoop]: Abstraction has 18253 states and 68605 transitions. [2021-08-06 14:09:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 18253 states and 68605 transitions. [2021-08-06 14:09:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:53,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:53,676 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:53,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 14:09:53,876 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,SelfDestructingSolverStorable52 [2021-08-06 14:09:53,877 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:53,877 INFO L82 PathProgramCache]: Analyzing trace with hash 475835066, now seen corresponding path program 44 times [2021-08-06 14:09:53,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:53,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799223208] [2021-08-06 14:09:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:53,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:53,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:53,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799223208] [2021-08-06 14:09:53,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799223208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:53,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026671693] [2021-08-06 14:09:53,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:09:53,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:53,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:53,989 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:53,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 14:09:54,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:09:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:55,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026671693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:55,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:55,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:09:55,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381804216] [2021-08-06 14:09:55,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:09:55,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:09:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:09:55,268 INFO L87 Difference]: Start difference. First operand 18253 states and 68605 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:55,606 INFO L93 Difference]: Finished difference Result 18617 states and 69621 transitions. [2021-08-06 14:09:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:09:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:55,674 INFO L225 Difference]: With dead ends: 18617 [2021-08-06 14:09:55,674 INFO L226 Difference]: Without dead ends: 18549 [2021-08-06 14:09:55,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18549 states. [2021-08-06 14:09:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18549 to 18348. [2021-08-06 14:09:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18348 states, 18347 states have (on average 3.7579440780509077) internal successors, (68947), 18347 states have internal predecessors, (68947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18348 states to 18348 states and 68947 transitions. [2021-08-06 14:09:56,026 INFO L78 Accepts]: Start accepts. Automaton has 18348 states and 68947 transitions. Word has length 27 [2021-08-06 14:09:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:56,026 INFO L470 AbstractCegarLoop]: Abstraction has 18348 states and 68947 transitions. [2021-08-06 14:09:56,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18348 states and 68947 transitions. [2021-08-06 14:09:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:56,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:56,060 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:56,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 14:09:56,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:56,263 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:56,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1506518146, now seen corresponding path program 45 times [2021-08-06 14:09:56,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:56,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632640905] [2021-08-06 14:09:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:56,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:56,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:56,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632640905] [2021-08-06 14:09:56,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632640905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:56,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119582041] [2021-08-06 14:09:56,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:09:56,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:56,383 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:56,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 14:09:57,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:09:57,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:57,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:09:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:57,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119582041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:57,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:09:57,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:09:57,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050018032] [2021-08-06 14:09:57,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:09:57,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:09:57,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:09:57,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:09:57,742 INFO L87 Difference]: Start difference. First operand 18348 states and 68947 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:09:58,106 INFO L93 Difference]: Finished difference Result 19544 states and 72368 transitions. [2021-08-06 14:09:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:09:58,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:09:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:09:58,162 INFO L225 Difference]: With dead ends: 19544 [2021-08-06 14:09:58,162 INFO L226 Difference]: Without dead ends: 19514 [2021-08-06 14:09:58,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:09:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19514 states. [2021-08-06 14:09:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19514 to 18545. [2021-08-06 14:09:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18545 states, 18544 states have (on average 3.7598684210526314) internal successors, (69723), 18544 states have internal predecessors, (69723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18545 states to 18545 states and 69723 transitions. [2021-08-06 14:09:58,552 INFO L78 Accepts]: Start accepts. Automaton has 18545 states and 69723 transitions. Word has length 27 [2021-08-06 14:09:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:09:58,552 INFO L470 AbstractCegarLoop]: Abstraction has 18545 states and 69723 transitions. [2021-08-06 14:09:58,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:09:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 18545 states and 69723 transitions. [2021-08-06 14:09:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:09:58,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:09:58,585 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:09:58,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 14:09:58,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:58,785 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:09:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:09:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1512496010, now seen corresponding path program 46 times [2021-08-06 14:09:58,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:09:58,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394104242] [2021-08-06 14:09:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:09:58,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:09:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:09:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:09:58,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:09:58,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394104242] [2021-08-06 14:09:58,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394104242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:09:58,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105625813] [2021-08-06 14:09:58,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:09:58,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:09:58,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:09:58,901 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:09:58,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 14:09:59,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:09:59,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:09:59,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:09:59,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:00,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105625813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:00,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:00,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:10:00,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896161010] [2021-08-06 14:10:00,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:00,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:00,276 INFO L87 Difference]: Start difference. First operand 18545 states and 69723 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:00,628 INFO L93 Difference]: Finished difference Result 18908 states and 70694 transitions. [2021-08-06 14:10:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:10:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:00,683 INFO L225 Difference]: With dead ends: 18908 [2021-08-06 14:10:00,683 INFO L226 Difference]: Without dead ends: 18852 [2021-08-06 14:10:00,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18852 states. [2021-08-06 14:10:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18852 to 18607. [2021-08-06 14:10:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18607 states, 18606 states have (on average 3.7588412340105344) internal successors, (69937), 18606 states have internal predecessors, (69937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 69937 transitions. [2021-08-06 14:10:01,044 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 69937 transitions. Word has length 27 [2021-08-06 14:10:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:01,044 INFO L470 AbstractCegarLoop]: Abstraction has 18607 states and 69937 transitions. [2021-08-06 14:10:01,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 69937 transitions. [2021-08-06 14:10:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:01,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:01,082 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:01,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 14:10:01,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 14:10:01,284 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:01,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:01,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1415860474, now seen corresponding path program 47 times [2021-08-06 14:10:01,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:01,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699509813] [2021-08-06 14:10:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:01,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:01,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:01,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:01,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699509813] [2021-08-06 14:10:01,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699509813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:01,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824696798] [2021-08-06 14:10:01,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:10:01,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:01,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:01,433 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:01,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 14:10:02,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:10:02,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:02,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:02,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824696798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:02,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:02,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:10:02,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952427482] [2021-08-06 14:10:02,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:02,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:02,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:02,839 INFO L87 Difference]: Start difference. First operand 18607 states and 69937 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:03,125 INFO L93 Difference]: Finished difference Result 18997 states and 71037 transitions. [2021-08-06 14:10:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:03,126 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:03,178 INFO L225 Difference]: With dead ends: 18997 [2021-08-06 14:10:03,179 INFO L226 Difference]: Without dead ends: 18967 [2021-08-06 14:10:03,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:03,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18967 states. [2021-08-06 14:10:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18967 to 18666. [2021-08-06 14:10:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18666 states, 18665 states have (on average 3.758692740423252) internal successors, (70156), 18665 states have internal predecessors, (70156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18666 states to 18666 states and 70156 transitions. [2021-08-06 14:10:03,547 INFO L78 Accepts]: Start accepts. Automaton has 18666 states and 70156 transitions. Word has length 27 [2021-08-06 14:10:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:03,547 INFO L470 AbstractCegarLoop]: Abstraction has 18666 states and 70156 transitions. [2021-08-06 14:10:03,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 18666 states and 70156 transitions. [2021-08-06 14:10:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:03,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:03,578 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:03,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 14:10:03,778 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,SelfDestructingSolverStorable56 [2021-08-06 14:10:03,779 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1723053450, now seen corresponding path program 48 times [2021-08-06 14:10:03,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:03,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718473790] [2021-08-06 14:10:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:03,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:03,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:03,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718473790] [2021-08-06 14:10:03,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718473790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:03,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491490547] [2021-08-06 14:10:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:10:03,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:03,887 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:03,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 14:10:04,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:10:04,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:04,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:05,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491490547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:05,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:05,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:10:05,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246255584] [2021-08-06 14:10:05,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:05,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:05,294 INFO L87 Difference]: Start difference. First operand 18666 states and 70156 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:05,563 INFO L93 Difference]: Finished difference Result 19104 states and 71357 transitions. [2021-08-06 14:10:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:05,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:05,625 INFO L225 Difference]: With dead ends: 19104 [2021-08-06 14:10:05,626 INFO L226 Difference]: Without dead ends: 19009 [2021-08-06 14:10:05,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-08-06 14:10:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 18762. [2021-08-06 14:10:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18762 states, 18761 states have (on average 3.7569425936783754) internal successors, (70484), 18761 states have internal predecessors, (70484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18762 states to 18762 states and 70484 transitions. [2021-08-06 14:10:06,103 INFO L78 Accepts]: Start accepts. Automaton has 18762 states and 70484 transitions. Word has length 27 [2021-08-06 14:10:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:06,103 INFO L470 AbstractCegarLoop]: Abstraction has 18762 states and 70484 transitions. [2021-08-06 14:10:06,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 18762 states and 70484 transitions. [2021-08-06 14:10:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:06,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:06,140 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:06,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 14:10:06,340 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,SelfDestructingSolverStorable57 [2021-08-06 14:10:06,341 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1507328886, now seen corresponding path program 49 times [2021-08-06 14:10:06,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:06,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561608194] [2021-08-06 14:10:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:06,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:06,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:06,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561608194] [2021-08-06 14:10:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561608194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:06,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877308818] [2021-08-06 14:10:06,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:10:06,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:06,458 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:06,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 14:10:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:07,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:07,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:07,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877308818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:07,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:07,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:07,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184640479] [2021-08-06 14:10:07,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:07,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:07,885 INFO L87 Difference]: Start difference. First operand 18762 states and 70484 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:08,227 INFO L93 Difference]: Finished difference Result 19272 states and 71926 transitions. [2021-08-06 14:10:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:10:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:08,278 INFO L225 Difference]: With dead ends: 19272 [2021-08-06 14:10:08,278 INFO L226 Difference]: Without dead ends: 19242 [2021-08-06 14:10:08,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:10:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19242 states. [2021-08-06 14:10:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19242 to 18822. [2021-08-06 14:10:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18822 states, 18821 states have (on average 3.756336007651028) internal successors, (70698), 18821 states have internal predecessors, (70698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18822 states to 18822 states and 70698 transitions. [2021-08-06 14:10:08,681 INFO L78 Accepts]: Start accepts. Automaton has 18822 states and 70698 transitions. Word has length 27 [2021-08-06 14:10:08,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:08,681 INFO L470 AbstractCegarLoop]: Abstraction has 18822 states and 70698 transitions. [2021-08-06 14:10:08,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 18822 states and 70698 transitions. [2021-08-06 14:10:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:08,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:08,714 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:08,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:08,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 14:10:08,915 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2024019590, now seen corresponding path program 50 times [2021-08-06 14:10:08,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:08,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264229414] [2021-08-06 14:10:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:08,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:09,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:09,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264229414] [2021-08-06 14:10:09,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264229414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:09,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119344652] [2021-08-06 14:10:09,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:10:09,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:09,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:09,042 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:09,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 14:10:10,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:10:10,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:10,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:10,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119344652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:10,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:10,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:10,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116587551] [2021-08-06 14:10:10,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:10,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:10,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:10,482 INFO L87 Difference]: Start difference. First operand 18822 states and 70698 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:10,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:10,939 INFO L93 Difference]: Finished difference Result 19195 states and 71735 transitions. [2021-08-06 14:10:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:10:10,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:10,989 INFO L225 Difference]: With dead ends: 19195 [2021-08-06 14:10:10,989 INFO L226 Difference]: Without dead ends: 19129 [2021-08-06 14:10:10,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:10:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19129 states. [2021-08-06 14:10:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19129 to 18894. [2021-08-06 14:10:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18894 states, 18893 states have (on average 3.7564177208489915) internal successors, (70970), 18893 states have internal predecessors, (70970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18894 states to 18894 states and 70970 transitions. [2021-08-06 14:10:11,334 INFO L78 Accepts]: Start accepts. Automaton has 18894 states and 70970 transitions. Word has length 27 [2021-08-06 14:10:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:11,334 INFO L470 AbstractCegarLoop]: Abstraction has 18894 states and 70970 transitions. [2021-08-06 14:10:11,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18894 states and 70970 transitions. [2021-08-06 14:10:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:11,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:11,369 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:11,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:11,570 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,SelfDestructingSolverStorable59 [2021-08-06 14:10:11,570 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:11,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1829336258, now seen corresponding path program 51 times [2021-08-06 14:10:11,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:11,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461649462] [2021-08-06 14:10:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:11,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:11,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:11,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461649462] [2021-08-06 14:10:11,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461649462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:11,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385339601] [2021-08-06 14:10:11,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:10:11,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:11,692 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:11,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 14:10:12,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:10:12,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:13,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385339601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:13,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:13,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:13,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506025800] [2021-08-06 14:10:13,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:13,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:13,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:13,175 INFO L87 Difference]: Start difference. First operand 18894 states and 70970 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:13,543 INFO L93 Difference]: Finished difference Result 19278 states and 72078 transitions. [2021-08-06 14:10:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:13,543 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:13,598 INFO L225 Difference]: With dead ends: 19278 [2021-08-06 14:10:13,598 INFO L226 Difference]: Without dead ends: 19248 [2021-08-06 14:10:13,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:10:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19248 states. [2021-08-06 14:10:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19248 to 18924. [2021-08-06 14:10:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18924 states, 18923 states have (on average 3.757860804312213) internal successors, (71110), 18923 states have internal predecessors, (71110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18924 states to 18924 states and 71110 transitions. [2021-08-06 14:10:13,977 INFO L78 Accepts]: Start accepts. Automaton has 18924 states and 71110 transitions. Word has length 27 [2021-08-06 14:10:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:13,977 INFO L470 AbstractCegarLoop]: Abstraction has 18924 states and 71110 transitions. [2021-08-06 14:10:13,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 18924 states and 71110 transitions. [2021-08-06 14:10:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:14,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:14,012 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:14,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 14:10:14,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:14,212 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1559770698, now seen corresponding path program 52 times [2021-08-06 14:10:14,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:14,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041335864] [2021-08-06 14:10:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:14,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:14,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:14,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041335864] [2021-08-06 14:10:14,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041335864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:14,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861640755] [2021-08-06 14:10:14,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:10:14,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:14,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:14,341 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:14,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 14:10:15,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:10:15,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:15,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:15,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861640755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:15,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:15,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:15,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959843715] [2021-08-06 14:10:15,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:15,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:15,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:15,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:15,915 INFO L87 Difference]: Start difference. First operand 18924 states and 71110 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:16,353 INFO L93 Difference]: Finished difference Result 19320 states and 72254 transitions. [2021-08-06 14:10:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:16,404 INFO L225 Difference]: With dead ends: 19320 [2021-08-06 14:10:16,404 INFO L226 Difference]: Without dead ends: 19290 [2021-08-06 14:10:16,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:10:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19290 states. [2021-08-06 14:10:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19290 to 18996. [2021-08-06 14:10:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18996 states, 18995 states have (on average 3.7574098446959727) internal successors, (71372), 18995 states have internal predecessors, (71372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18996 states to 18996 states and 71372 transitions. [2021-08-06 14:10:16,762 INFO L78 Accepts]: Start accepts. Automaton has 18996 states and 71372 transitions. Word has length 27 [2021-08-06 14:10:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:16,762 INFO L470 AbstractCegarLoop]: Abstraction has 18996 states and 71372 transitions. [2021-08-06 14:10:16,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 18996 states and 71372 transitions. [2021-08-06 14:10:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:16,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:16,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:16,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 14:10:16,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:16,995 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1365087366, now seen corresponding path program 53 times [2021-08-06 14:10:16,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:16,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080271646] [2021-08-06 14:10:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:16,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:17,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:17,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080271646] [2021-08-06 14:10:17,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080271646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:17,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262562504] [2021-08-06 14:10:17,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:10:17,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:17,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:17,146 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:17,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 14:10:18,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:10:18,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:18,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:18,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262562504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:18,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:18,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:18,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625605987] [2021-08-06 14:10:18,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:18,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:18,674 INFO L87 Difference]: Start difference. First operand 18996 states and 71372 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:18,977 INFO L93 Difference]: Finished difference Result 19273 states and 72121 transitions. [2021-08-06 14:10:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:19,036 INFO L225 Difference]: With dead ends: 19273 [2021-08-06 14:10:19,037 INFO L226 Difference]: Without dead ends: 19199 [2021-08-06 14:10:19,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:10:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19199 states. [2021-08-06 14:10:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19199 to 19036. [2021-08-06 14:10:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19036 states, 19035 states have (on average 3.757499343314946) internal successors, (71524), 19035 states have internal predecessors, (71524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19036 states to 19036 states and 71524 transitions. [2021-08-06 14:10:19,388 INFO L78 Accepts]: Start accepts. Automaton has 19036 states and 71524 transitions. Word has length 27 [2021-08-06 14:10:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:19,388 INFO L470 AbstractCegarLoop]: Abstraction has 19036 states and 71524 transitions. [2021-08-06 14:10:19,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:19,388 INFO L276 IsEmpty]: Start isEmpty. Operand 19036 states and 71524 transitions. [2021-08-06 14:10:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:19,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:19,421 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:19,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 14:10:19,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:19,622 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash -564336006, now seen corresponding path program 54 times [2021-08-06 14:10:19,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:19,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301560559] [2021-08-06 14:10:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:19,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:19,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:19,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301560559] [2021-08-06 14:10:19,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301560559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:19,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775397634] [2021-08-06 14:10:19,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:10:19,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:19,760 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:19,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 14:10:20,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:10:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:21,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775397634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:21,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:21,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:21,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895353482] [2021-08-06 14:10:21,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:21,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:21,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:21,407 INFO L87 Difference]: Start difference. First operand 19036 states and 71524 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:21,743 INFO L93 Difference]: Finished difference Result 19201 states and 72013 transitions. [2021-08-06 14:10:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:10:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:21,794 INFO L225 Difference]: With dead ends: 19201 [2021-08-06 14:10:21,794 INFO L226 Difference]: Without dead ends: 19186 [2021-08-06 14:10:21,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:10:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19186 states. [2021-08-06 14:10:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19186 to 19066. [2021-08-06 14:10:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19066 states, 19065 states have (on average 3.756622082349856) internal successors, (71620), 19065 states have internal predecessors, (71620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19066 states to 19066 states and 71620 transitions. [2021-08-06 14:10:22,151 INFO L78 Accepts]: Start accepts. Automaton has 19066 states and 71620 transitions. Word has length 27 [2021-08-06 14:10:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:22,151 INFO L470 AbstractCegarLoop]: Abstraction has 19066 states and 71620 transitions. [2021-08-06 14:10:22,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 19066 states and 71620 transitions. [2021-08-06 14:10:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:22,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:22,188 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:22,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 14:10:22,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:22,388 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:22,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:22,389 INFO L82 PathProgramCache]: Analyzing trace with hash -543379962, now seen corresponding path program 55 times [2021-08-06 14:10:22,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:22,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325160197] [2021-08-06 14:10:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:22,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:10:22,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:22,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325160197] [2021-08-06 14:10:22,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325160197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:22,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68475996] [2021-08-06 14:10:22,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:10:22,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:22,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:22,506 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:22,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 14:10:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:23,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:23,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:24,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68475996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:24,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:24,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:10:24,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34857784] [2021-08-06 14:10:24,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:24,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:24,087 INFO L87 Difference]: Start difference. First operand 19066 states and 71620 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:24,401 INFO L93 Difference]: Finished difference Result 19357 states and 72381 transitions. [2021-08-06 14:10:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:24,451 INFO L225 Difference]: With dead ends: 19357 [2021-08-06 14:10:24,452 INFO L226 Difference]: Without dead ends: 19307 [2021-08-06 14:10:24,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19307 states. [2021-08-06 14:10:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19307 to 19111. [2021-08-06 14:10:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19111 states, 19110 states have (on average 3.7562532705389846) internal successors, (71782), 19110 states have internal predecessors, (71782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19111 states to 19111 states and 71782 transitions. [2021-08-06 14:10:24,815 INFO L78 Accepts]: Start accepts. Automaton has 19111 states and 71782 transitions. Word has length 27 [2021-08-06 14:10:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:24,816 INFO L470 AbstractCegarLoop]: Abstraction has 19111 states and 71782 transitions. [2021-08-06 14:10:24,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand 19111 states and 71782 transitions. [2021-08-06 14:10:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:24,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:24,850 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:24,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 14:10:25,050 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,SelfDestructingSolverStorable64 [2021-08-06 14:10:25,051 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash 904745286, now seen corresponding path program 56 times [2021-08-06 14:10:25,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:25,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895245977] [2021-08-06 14:10:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:25,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:25,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:25,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895245977] [2021-08-06 14:10:25,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895245977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:25,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374034634] [2021-08-06 14:10:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:10:25,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:25,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:25,189 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:25,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 14:10:26,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:10:26,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:26,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:26,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374034634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:26,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:26,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:26,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145207715] [2021-08-06 14:10:26,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:26,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:26,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:26,938 INFO L87 Difference]: Start difference. First operand 19111 states and 71782 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:27,397 INFO L93 Difference]: Finished difference Result 19421 states and 72660 transitions. [2021-08-06 14:10:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:27,481 INFO L225 Difference]: With dead ends: 19421 [2021-08-06 14:10:27,482 INFO L226 Difference]: Without dead ends: 19353 [2021-08-06 14:10:27,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:10:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19353 states. [2021-08-06 14:10:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19353 to 19175. [2021-08-06 14:10:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19175 states, 19174 states have (on average 3.7549807030353604) internal successors, (71998), 19174 states have internal predecessors, (71998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19175 states to 19175 states and 71998 transitions. [2021-08-06 14:10:27,971 INFO L78 Accepts]: Start accepts. Automaton has 19175 states and 71998 transitions. Word has length 27 [2021-08-06 14:10:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:27,971 INFO L470 AbstractCegarLoop]: Abstraction has 19175 states and 71998 transitions. [2021-08-06 14:10:27,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 19175 states and 71998 transitions. [2021-08-06 14:10:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:28,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:28,010 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:28,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:28,210 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,SelfDestructingSolverStorable65 [2021-08-06 14:10:28,211 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1372144142, now seen corresponding path program 57 times [2021-08-06 14:10:28,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:28,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466315393] [2021-08-06 14:10:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:28,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:28,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:28,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466315393] [2021-08-06 14:10:28,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466315393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:28,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976394812] [2021-08-06 14:10:28,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:10:28,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:28,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:28,329 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:28,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 14:10:29,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:10:29,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:29,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:30,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976394812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:30,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:30,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:30,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542100257] [2021-08-06 14:10:30,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:30,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:30,012 INFO L87 Difference]: Start difference. First operand 19175 states and 71998 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:30,267 INFO L93 Difference]: Finished difference Result 19345 states and 72416 transitions. [2021-08-06 14:10:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:30,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:30,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:30,323 INFO L225 Difference]: With dead ends: 19345 [2021-08-06 14:10:30,323 INFO L226 Difference]: Without dead ends: 19223 [2021-08-06 14:10:30,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:10:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19223 states. [2021-08-06 14:10:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19223 to 19215. [2021-08-06 14:10:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19215 states, 19214 states have (on average 3.7529926095555326) internal successors, (72110), 19214 states have internal predecessors, (72110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19215 states to 19215 states and 72110 transitions. [2021-08-06 14:10:30,705 INFO L78 Accepts]: Start accepts. Automaton has 19215 states and 72110 transitions. Word has length 27 [2021-08-06 14:10:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:30,706 INFO L470 AbstractCegarLoop]: Abstraction has 19215 states and 72110 transitions. [2021-08-06 14:10:30,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 19215 states and 72110 transitions. [2021-08-06 14:10:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:30,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:30,741 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:30,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 14:10:30,941 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,SelfDestructingSolverStorable66 [2021-08-06 14:10:30,942 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:30,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1879750670, now seen corresponding path program 58 times [2021-08-06 14:10:30,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:30,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443905842] [2021-08-06 14:10:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:30,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:31,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:31,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443905842] [2021-08-06 14:10:31,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443905842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:31,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854849737] [2021-08-06 14:10:31,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:10:31,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:31,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:31,081 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:31,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 14:10:32,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:10:32,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:32,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:32,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854849737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:32,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:32,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:32,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894231166] [2021-08-06 14:10:32,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:32,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:32,844 INFO L87 Difference]: Start difference. First operand 19215 states and 72110 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:33,177 INFO L93 Difference]: Finished difference Result 19339 states and 72436 transitions. [2021-08-06 14:10:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:10:33,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:33,232 INFO L225 Difference]: With dead ends: 19339 [2021-08-06 14:10:33,233 INFO L226 Difference]: Without dead ends: 19313 [2021-08-06 14:10:33,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:10:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19313 states. [2021-08-06 14:10:33,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19313 to 19230. [2021-08-06 14:10:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19230 states, 19229 states have (on average 3.752769254771439) internal successors, (72162), 19229 states have internal predecessors, (72162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19230 states to 19230 states and 72162 transitions. [2021-08-06 14:10:33,601 INFO L78 Accepts]: Start accepts. Automaton has 19230 states and 72162 transitions. Word has length 27 [2021-08-06 14:10:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:33,601 INFO L470 AbstractCegarLoop]: Abstraction has 19230 states and 72162 transitions. [2021-08-06 14:10:33,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 19230 states and 72162 transitions. [2021-08-06 14:10:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:33,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:33,637 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:33,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 14:10:33,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:33,837 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 392023814, now seen corresponding path program 59 times [2021-08-06 14:10:33,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:33,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947804113] [2021-08-06 14:10:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:33,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:33,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:33,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947804113] [2021-08-06 14:10:33,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947804113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:33,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585482026] [2021-08-06 14:10:33,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:10:33,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:33,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:33,963 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:33,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 14:10:35,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:10:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:35,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585482026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:35,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:35,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:35,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634547785] [2021-08-06 14:10:35,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:35,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:35,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:35,659 INFO L87 Difference]: Start difference. First operand 19230 states and 72162 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:36,022 INFO L93 Difference]: Finished difference Result 19723 states and 73540 transitions. [2021-08-06 14:10:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:36,023 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:36,080 INFO L225 Difference]: With dead ends: 19723 [2021-08-06 14:10:36,081 INFO L226 Difference]: Without dead ends: 19693 [2021-08-06 14:10:36,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:10:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19693 states. [2021-08-06 14:10:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19693 to 19295. [2021-08-06 14:10:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19295 states, 19294 states have (on average 3.7519436094122525) internal successors, (72390), 19294 states have internal predecessors, (72390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19295 states to 19295 states and 72390 transitions. [2021-08-06 14:10:36,641 INFO L78 Accepts]: Start accepts. Automaton has 19295 states and 72390 transitions. Word has length 27 [2021-08-06 14:10:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:36,641 INFO L470 AbstractCegarLoop]: Abstraction has 19295 states and 72390 transitions. [2021-08-06 14:10:36,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 19295 states and 72390 transitions. [2021-08-06 14:10:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:36,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:36,672 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:36,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:36,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:36,873 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash -764029558, now seen corresponding path program 60 times [2021-08-06 14:10:36,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:36,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833562982] [2021-08-06 14:10:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:36,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:36,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:36,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833562982] [2021-08-06 14:10:36,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833562982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:36,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139991673] [2021-08-06 14:10:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:10:36,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:36,985 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:36,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 14:10:38,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:10:38,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:38,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139991673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:38,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:38,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:38,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916191855] [2021-08-06 14:10:38,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:38,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:38,751 INFO L87 Difference]: Start difference. First operand 19295 states and 72390 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:39,060 INFO L93 Difference]: Finished difference Result 19671 states and 73405 transitions. [2021-08-06 14:10:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:39,119 INFO L225 Difference]: With dead ends: 19671 [2021-08-06 14:10:39,119 INFO L226 Difference]: Without dead ends: 19591 [2021-08-06 14:10:39,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:10:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19591 states. [2021-08-06 14:10:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19591 to 19321. [2021-08-06 14:10:39,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19321 states, 19320 states have (on average 3.753260869565217) internal successors, (72513), 19320 states have internal predecessors, (72513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19321 states to 19321 states and 72513 transitions. [2021-08-06 14:10:39,496 INFO L78 Accepts]: Start accepts. Automaton has 19321 states and 72513 transitions. Word has length 27 [2021-08-06 14:10:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:39,497 INFO L470 AbstractCegarLoop]: Abstraction has 19321 states and 72513 transitions. [2021-08-06 14:10:39,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 19321 states and 72513 transitions. [2021-08-06 14:10:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:39,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:39,533 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:39,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 14:10:39,733 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,SelfDestructingSolverStorable69 [2021-08-06 14:10:39,734 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:39,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1720511174, now seen corresponding path program 61 times [2021-08-06 14:10:39,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:39,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476404535] [2021-08-06 14:10:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:39,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:39,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:39,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476404535] [2021-08-06 14:10:39,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476404535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:39,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244054339] [2021-08-06 14:10:39,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:10:39,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:39,858 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:39,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 14:10:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:41,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:41,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244054339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:41,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:41,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:41,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167604052] [2021-08-06 14:10:41,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:41,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:41,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:41,627 INFO L87 Difference]: Start difference. First operand 19321 states and 72513 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:42,020 INFO L93 Difference]: Finished difference Result 19486 states and 73002 transitions. [2021-08-06 14:10:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:10:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:42,076 INFO L225 Difference]: With dead ends: 19486 [2021-08-06 14:10:42,076 INFO L226 Difference]: Without dead ends: 19471 [2021-08-06 14:10:42,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:10:42,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19471 states. [2021-08-06 14:10:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19471 to 19330. [2021-08-06 14:10:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19330 states, 19329 states have (on average 3.753582699570593) internal successors, (72553), 19329 states have internal predecessors, (72553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19330 states to 19330 states and 72553 transitions. [2021-08-06 14:10:42,448 INFO L78 Accepts]: Start accepts. Automaton has 19330 states and 72553 transitions. Word has length 27 [2021-08-06 14:10:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:42,448 INFO L470 AbstractCegarLoop]: Abstraction has 19330 states and 72553 transitions. [2021-08-06 14:10:42,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 19330 states and 72553 transitions. [2021-08-06 14:10:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:42,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:42,481 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:42,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:42,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:42,682 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:42,682 INFO L82 PathProgramCache]: Analyzing trace with hash 974893574, now seen corresponding path program 62 times [2021-08-06 14:10:42,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:42,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424034271] [2021-08-06 14:10:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:42,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:42,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:42,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424034271] [2021-08-06 14:10:42,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424034271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:42,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924571579] [2021-08-06 14:10:42,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:10:42,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:42,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:42,793 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:42,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 14:10:44,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:10:44,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:44,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:44,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924571579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:44,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:44,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:10:44,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633291543] [2021-08-06 14:10:44,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:10:44,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:44,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:10:44,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:10:44,600 INFO L87 Difference]: Start difference. First operand 19330 states and 72553 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:44,966 INFO L93 Difference]: Finished difference Result 20619 states and 76362 transitions. [2021-08-06 14:10:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:10:44,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:45,028 INFO L225 Difference]: With dead ends: 20619 [2021-08-06 14:10:45,028 INFO L226 Difference]: Without dead ends: 20585 [2021-08-06 14:10:45,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:10:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20585 states. [2021-08-06 14:10:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20585 to 19655. [2021-08-06 14:10:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19655 states, 19654 states have (on average 3.75490994199654) internal successors, (73799), 19654 states have internal predecessors, (73799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19655 states to 19655 states and 73799 transitions. [2021-08-06 14:10:45,509 INFO L78 Accepts]: Start accepts. Automaton has 19655 states and 73799 transitions. Word has length 27 [2021-08-06 14:10:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:45,510 INFO L470 AbstractCegarLoop]: Abstraction has 19655 states and 73799 transitions. [2021-08-06 14:10:45,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 19655 states and 73799 transitions. [2021-08-06 14:10:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:45,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:45,552 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:45,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 14:10:45,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:45,752 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash 612630986, now seen corresponding path program 63 times [2021-08-06 14:10:45,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:45,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896013136] [2021-08-06 14:10:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:45,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:45,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:45,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896013136] [2021-08-06 14:10:45,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896013136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:45,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311627975] [2021-08-06 14:10:45,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:10:45,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:45,858 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:45,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 14:10:47,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:10:47,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:47,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311627975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:47,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:47,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:10:47,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301645982] [2021-08-06 14:10:47,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:47,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:47,768 INFO L87 Difference]: Start difference. First operand 19655 states and 73799 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:48,036 INFO L93 Difference]: Finished difference Result 20090 states and 75052 transitions. [2021-08-06 14:10:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:10:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:48,093 INFO L225 Difference]: With dead ends: 20090 [2021-08-06 14:10:48,094 INFO L226 Difference]: Without dead ends: 20060 [2021-08-06 14:10:48,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20060 states. [2021-08-06 14:10:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20060 to 19710. [2021-08-06 14:10:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19710 states, 19709 states have (on average 3.755593891115734) internal successors, (74019), 19709 states have internal predecessors, (74019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19710 states to 19710 states and 74019 transitions. [2021-08-06 14:10:48,491 INFO L78 Accepts]: Start accepts. Automaton has 19710 states and 74019 transitions. Word has length 27 [2021-08-06 14:10:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:48,491 INFO L470 AbstractCegarLoop]: Abstraction has 19710 states and 74019 transitions. [2021-08-06 14:10:48,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 19710 states and 74019 transitions. [2021-08-06 14:10:48,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:48,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:48,530 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:48,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:48,730 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,SelfDestructingSolverStorable72 [2021-08-06 14:10:48,730 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:48,731 INFO L82 PathProgramCache]: Analyzing trace with hash -990521266, now seen corresponding path program 64 times [2021-08-06 14:10:48,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:48,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516820758] [2021-08-06 14:10:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:48,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:48,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:48,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516820758] [2021-08-06 14:10:48,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516820758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:48,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352596625] [2021-08-06 14:10:48,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:10:48,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:48,832 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:48,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 14:10:50,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:10:50,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:50,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:50,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352596625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:50,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:50,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:10:50,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985564653] [2021-08-06 14:10:50,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:50,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:50,694 INFO L87 Difference]: Start difference. First operand 19710 states and 74019 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:51,051 INFO L93 Difference]: Finished difference Result 20082 states and 75075 transitions. [2021-08-06 14:10:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:51,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:51,113 INFO L225 Difference]: With dead ends: 20082 [2021-08-06 14:10:51,113 INFO L226 Difference]: Without dead ends: 20052 [2021-08-06 14:10:51,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20052 states. [2021-08-06 14:10:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20052 to 19756. [2021-08-06 14:10:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19756 states, 19755 states have (on average 3.7558086560364465) internal successors, (74196), 19755 states have internal predecessors, (74196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19756 states to 19756 states and 74196 transitions. [2021-08-06 14:10:51,520 INFO L78 Accepts]: Start accepts. Automaton has 19756 states and 74196 transitions. Word has length 27 [2021-08-06 14:10:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:51,520 INFO L470 AbstractCegarLoop]: Abstraction has 19756 states and 74196 transitions. [2021-08-06 14:10:51,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 19756 states and 74196 transitions. [2021-08-06 14:10:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:51,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:51,556 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:51,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 14:10:51,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:51,757 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash -523122410, now seen corresponding path program 65 times [2021-08-06 14:10:51,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:51,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223766685] [2021-08-06 14:10:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:51,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:51,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:51,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223766685] [2021-08-06 14:10:51,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223766685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:51,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584483817] [2021-08-06 14:10:51,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:10:51,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:51,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:51,949 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:51,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 14:10:53,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:10:53,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:53,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:53,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584483817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:53,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:53,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:10:53,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528970564] [2021-08-06 14:10:53,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:53,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:53,831 INFO L87 Difference]: Start difference. First operand 19756 states and 74196 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:54,242 INFO L93 Difference]: Finished difference Result 20095 states and 75133 transitions. [2021-08-06 14:10:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:10:54,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:54,318 INFO L225 Difference]: With dead ends: 20095 [2021-08-06 14:10:54,318 INFO L226 Difference]: Without dead ends: 20003 [2021-08-06 14:10:54,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20003 states. [2021-08-06 14:10:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20003 to 19816. [2021-08-06 14:10:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 19815 states have (on average 3.7551854655563965) internal successors, (74409), 19815 states have internal predecessors, (74409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 74409 transitions. [2021-08-06 14:10:54,721 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 74409 transitions. Word has length 27 [2021-08-06 14:10:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:54,721 INFO L470 AbstractCegarLoop]: Abstraction has 19816 states and 74409 transitions. [2021-08-06 14:10:54,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:54,721 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 74409 transitions. [2021-08-06 14:10:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:54,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:54,760 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:54,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 14:10:54,960 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,SelfDestructingSolverStorable74 [2021-08-06 14:10:54,961 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:54,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1406917254, now seen corresponding path program 66 times [2021-08-06 14:10:54,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:54,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817180024] [2021-08-06 14:10:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:54,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:55,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:55,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817180024] [2021-08-06 14:10:55,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817180024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:55,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298702779] [2021-08-06 14:10:55,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:10:55,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:55,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:55,066 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:55,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 14:10:56,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:10:56,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:10:56,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:10:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:56,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298702779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:56,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:10:56,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:10:56,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421412246] [2021-08-06 14:10:56,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:10:56,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:10:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:10:56,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:10:56,987 INFO L87 Difference]: Start difference. First operand 19816 states and 74409 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:10:57,261 INFO L93 Difference]: Finished difference Result 20155 states and 75300 transitions. [2021-08-06 14:10:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:10:57,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:10:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:10:57,314 INFO L225 Difference]: With dead ends: 20155 [2021-08-06 14:10:57,314 INFO L226 Difference]: Without dead ends: 20105 [2021-08-06 14:10:57,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:10:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20105 states. [2021-08-06 14:10:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20105 to 19880. [2021-08-06 14:10:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19880 states, 19879 states have (on average 3.753760249509533) internal successors, (74621), 19879 states have internal predecessors, (74621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19880 states to 19880 states and 74621 transitions. [2021-08-06 14:10:57,786 INFO L78 Accepts]: Start accepts. Automaton has 19880 states and 74621 transitions. Word has length 27 [2021-08-06 14:10:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:10:57,787 INFO L470 AbstractCegarLoop]: Abstraction has 19880 states and 74621 transitions. [2021-08-06 14:10:57,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:10:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 19880 states and 74621 transitions. [2021-08-06 14:10:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:10:57,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:10:57,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:10:57,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 14:10:58,023 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,SelfDestructingSolverStorable75 [2021-08-06 14:10:58,024 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:10:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:10:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1597509750, now seen corresponding path program 67 times [2021-08-06 14:10:58,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:10:58,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622252278] [2021-08-06 14:10:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:10:58,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:10:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:10:58,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:10:58,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622252278] [2021-08-06 14:10:58,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622252278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:10:58,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485885519] [2021-08-06 14:10:58,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:10:58,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:10:58,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:10:58,126 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:10:58,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 14:10:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:10:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:10:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:00,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485885519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:00,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:00,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 14:11:00,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504274692] [2021-08-06 14:11:00,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:11:00,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:11:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:11:00,070 INFO L87 Difference]: Start difference. First operand 19880 states and 74621 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:00,454 INFO L93 Difference]: Finished difference Result 20253 states and 75608 transitions. [2021-08-06 14:11:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:00,515 INFO L225 Difference]: With dead ends: 20253 [2021-08-06 14:11:00,515 INFO L226 Difference]: Without dead ends: 20197 [2021-08-06 14:11:00,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:11:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20197 states. [2021-08-06 14:11:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20197 to 19939. [2021-08-06 14:11:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19939 states, 19938 states have (on average 3.753084562142642) internal successors, (74829), 19938 states have internal predecessors, (74829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19939 states to 19939 states and 74829 transitions. [2021-08-06 14:11:00,929 INFO L78 Accepts]: Start accepts. Automaton has 19939 states and 74829 transitions. Word has length 27 [2021-08-06 14:11:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:00,929 INFO L470 AbstractCegarLoop]: Abstraction has 19939 states and 74829 transitions. [2021-08-06 14:11:00,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 19939 states and 74829 transitions. [2021-08-06 14:11:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:00,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:00,967 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:00,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 14:11:01,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:01,168 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:01,168 INFO L82 PathProgramCache]: Analyzing trace with hash 798928522, now seen corresponding path program 68 times [2021-08-06 14:11:01,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:01,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574593269] [2021-08-06 14:11:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:01,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:01,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:01,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574593269] [2021-08-06 14:11:01,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574593269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:01,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041822547] [2021-08-06 14:11:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:11:01,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:01,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:01,301 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:01,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 14:11:03,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:11:03,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:03,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041822547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:03,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:03,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:03,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28505342] [2021-08-06 14:11:03,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:03,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:03,501 INFO L87 Difference]: Start difference. First operand 19939 states and 74829 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:03,920 INFO L93 Difference]: Finished difference Result 20459 states and 76290 transitions. [2021-08-06 14:11:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:03,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:03,978 INFO L225 Difference]: With dead ends: 20459 [2021-08-06 14:11:03,978 INFO L226 Difference]: Without dead ends: 20429 [2021-08-06 14:11:03,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20429 states. [2021-08-06 14:11:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20429 to 19996. [2021-08-06 14:11:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19996 states, 19995 states have (on average 3.752588147036759) internal successors, (75033), 19995 states have internal predecessors, (75033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19996 states to 19996 states and 75033 transitions. [2021-08-06 14:11:04,373 INFO L78 Accepts]: Start accepts. Automaton has 19996 states and 75033 transitions. Word has length 27 [2021-08-06 14:11:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:04,374 INFO L470 AbstractCegarLoop]: Abstraction has 19996 states and 75033 transitions. [2021-08-06 14:11:04,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 19996 states and 75033 transitions. [2021-08-06 14:11:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:04,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:04,410 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:04,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 14:11:04,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:04,610 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1266327378, now seen corresponding path program 69 times [2021-08-06 14:11:04,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:04,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795426731] [2021-08-06 14:11:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:04,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:04,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:04,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795426731] [2021-08-06 14:11:04,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795426731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:04,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395918907] [2021-08-06 14:11:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:11:04,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:04,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:04,747 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:04,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 14:11:06,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:11:06,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:06,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:06,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395918907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:06,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:06,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:06,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850416800] [2021-08-06 14:11:06,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:06,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:06,841 INFO L87 Difference]: Start difference. First operand 19996 states and 75033 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:07,204 INFO L93 Difference]: Finished difference Result 20307 states and 75858 transitions. [2021-08-06 14:11:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:07,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:07,264 INFO L225 Difference]: With dead ends: 20307 [2021-08-06 14:11:07,265 INFO L226 Difference]: Without dead ends: 20233 [2021-08-06 14:11:07,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-08-06 14:11:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 20020. [2021-08-06 14:11:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20020 states, 20019 states have (on average 3.753384284929317) internal successors, (75139), 20019 states have internal predecessors, (75139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20020 states to 20020 states and 75139 transitions. [2021-08-06 14:11:07,849 INFO L78 Accepts]: Start accepts. Automaton has 20020 states and 75139 transitions. Word has length 27 [2021-08-06 14:11:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:07,849 INFO L470 AbstractCegarLoop]: Abstraction has 20020 states and 75139 transitions. [2021-08-06 14:11:07,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20020 states and 75139 transitions. [2021-08-06 14:11:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:07,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:07,887 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:07,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 14:11:08,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 14:11:08,088 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:08,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1773933906, now seen corresponding path program 70 times [2021-08-06 14:11:08,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:08,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505859815] [2021-08-06 14:11:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:08,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:08,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:08,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505859815] [2021-08-06 14:11:08,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505859815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:08,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702642637] [2021-08-06 14:11:08,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:11:08,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:08,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:08,217 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:08,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 14:11:09,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:11:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:10,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702642637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:10,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:10,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:10,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011515289] [2021-08-06 14:11:10,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:10,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:10,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:10,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:10,244 INFO L87 Difference]: Start difference. First operand 20020 states and 75139 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:10,618 INFO L93 Difference]: Finished difference Result 20185 states and 75628 transitions. [2021-08-06 14:11:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:11:10,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:10,675 INFO L225 Difference]: With dead ends: 20185 [2021-08-06 14:11:10,675 INFO L226 Difference]: Without dead ends: 20170 [2021-08-06 14:11:10,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:11:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20170 states. [2021-08-06 14:11:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20170 to 20017. [2021-08-06 14:11:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20017 states, 20016 states have (on average 3.7542466027178256) internal successors, (75145), 20016 states have internal predecessors, (75145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20017 states to 20017 states and 75145 transitions. [2021-08-06 14:11:11,229 INFO L78 Accepts]: Start accepts. Automaton has 20017 states and 75145 transitions. Word has length 27 [2021-08-06 14:11:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:11,229 INFO L470 AbstractCegarLoop]: Abstraction has 20017 states and 75145 transitions. [2021-08-06 14:11:11,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 20017 states and 75145 transitions. [2021-08-06 14:11:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:11,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:11,265 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:11,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 14:11:11,465 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,SelfDestructingSolverStorable79 [2021-08-06 14:11:11,466 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:11,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:11,466 INFO L82 PathProgramCache]: Analyzing trace with hash 286207050, now seen corresponding path program 71 times [2021-08-06 14:11:11,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:11,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328052377] [2021-08-06 14:11:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:11,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:11,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:11,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328052377] [2021-08-06 14:11:11,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328052377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:11,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511641199] [2021-08-06 14:11:11,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:11:11,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:11,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:11,580 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:11,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 14:11:13,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:11:13,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:13,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:13,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511641199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:13,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:13,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:13,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76401151] [2021-08-06 14:11:13,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:13,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:13,777 INFO L87 Difference]: Start difference. First operand 20017 states and 75145 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:14,111 INFO L93 Difference]: Finished difference Result 20553 states and 76650 transitions. [2021-08-06 14:11:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:14,165 INFO L225 Difference]: With dead ends: 20553 [2021-08-06 14:11:14,165 INFO L226 Difference]: Without dead ends: 20515 [2021-08-06 14:11:14,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20515 states. [2021-08-06 14:11:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20515 to 20074. [2021-08-06 14:11:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20074 states, 20073 states have (on average 3.753449907836397) internal successors, (75343), 20073 states have internal predecessors, (75343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20074 states to 20074 states and 75343 transitions. [2021-08-06 14:11:14,544 INFO L78 Accepts]: Start accepts. Automaton has 20074 states and 75343 transitions. Word has length 27 [2021-08-06 14:11:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:14,545 INFO L470 AbstractCegarLoop]: Abstraction has 20074 states and 75343 transitions. [2021-08-06 14:11:14,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 20074 states and 75343 transitions. [2021-08-06 14:11:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:14,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:14,583 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:14,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 14:11:14,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:14,783 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -869846322, now seen corresponding path program 72 times [2021-08-06 14:11:14,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:14,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894251625] [2021-08-06 14:11:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:14,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:14,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:14,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894251625] [2021-08-06 14:11:14,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894251625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:14,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863290967] [2021-08-06 14:11:14,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:11:14,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:14,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:14,895 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:14,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 14:11:16,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:11:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:17,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863290967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:17,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:17,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:17,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93145839] [2021-08-06 14:11:17,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:17,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:17,122 INFO L87 Difference]: Start difference. First operand 20074 states and 75343 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:17,452 INFO L93 Difference]: Finished difference Result 20493 states and 76436 transitions. [2021-08-06 14:11:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:17,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:17,508 INFO L225 Difference]: With dead ends: 20493 [2021-08-06 14:11:17,508 INFO L226 Difference]: Without dead ends: 20393 [2021-08-06 14:11:17,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20393 states. [2021-08-06 14:11:17,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20393 to 20097. [2021-08-06 14:11:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20097 states, 20096 states have (on average 3.754080414012739) internal successors, (75442), 20096 states have internal predecessors, (75442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20097 states to 20097 states and 75442 transitions. [2021-08-06 14:11:17,901 INFO L78 Accepts]: Start accepts. Automaton has 20097 states and 75442 transitions. Word has length 27 [2021-08-06 14:11:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:17,901 INFO L470 AbstractCegarLoop]: Abstraction has 20097 states and 75442 transitions. [2021-08-06 14:11:17,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 20097 states and 75442 transitions. [2021-08-06 14:11:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:17,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:17,936 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:17,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 14:11:18,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:18,137 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1614694410, now seen corresponding path program 73 times [2021-08-06 14:11:18,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:18,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153935127] [2021-08-06 14:11:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:18,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:18,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:18,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153935127] [2021-08-06 14:11:18,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153935127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:18,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161809678] [2021-08-06 14:11:18,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:11:18,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:18,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:18,269 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:18,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 14:11:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:20,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:20,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161809678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:20,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:20,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:20,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30565582] [2021-08-06 14:11:20,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:20,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:20,478 INFO L87 Difference]: Start difference. First operand 20097 states and 75442 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:20,819 INFO L93 Difference]: Finished difference Result 20283 states and 75972 transitions. [2021-08-06 14:11:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:11:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:20,871 INFO L225 Difference]: With dead ends: 20283 [2021-08-06 14:11:20,871 INFO L226 Difference]: Without dead ends: 20264 [2021-08-06 14:11:20,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:11:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20264 states. [2021-08-06 14:11:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20264 to 20096. [2021-08-06 14:11:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20096 states, 20095 states have (on average 3.7550634486190595) internal successors, (75458), 20095 states have internal predecessors, (75458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20096 states to 20096 states and 75458 transitions. [2021-08-06 14:11:21,241 INFO L78 Accepts]: Start accepts. Automaton has 20096 states and 75458 transitions. Word has length 27 [2021-08-06 14:11:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:21,241 INFO L470 AbstractCegarLoop]: Abstraction has 20096 states and 75458 transitions. [2021-08-06 14:11:21,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 20096 states and 75458 transitions. [2021-08-06 14:11:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:21,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:21,279 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:21,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 14:11:21,481 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,SelfDestructingSolverStorable82 [2021-08-06 14:11:21,482 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1613186170, now seen corresponding path program 74 times [2021-08-06 14:11:21,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:21,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353595714] [2021-08-06 14:11:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:21,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:21,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:21,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353595714] [2021-08-06 14:11:21,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353595714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:21,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696791758] [2021-08-06 14:11:21,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:11:21,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:21,615 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:21,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 14:11:23,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:11:23,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:23,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:23,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:23,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696791758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:23,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:23,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:23,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955446251] [2021-08-06 14:11:23,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:23,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:23,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:23,990 INFO L87 Difference]: Start difference. First operand 20096 states and 75458 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:24,428 INFO L93 Difference]: Finished difference Result 20753 states and 77297 transitions. [2021-08-06 14:11:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:24,484 INFO L225 Difference]: With dead ends: 20753 [2021-08-06 14:11:24,484 INFO L226 Difference]: Without dead ends: 20723 [2021-08-06 14:11:24,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20723 states. [2021-08-06 14:11:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20723 to 20191. [2021-08-06 14:11:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 3.753392768697375) internal successors, (75781), 20190 states have internal predecessors, (75781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 75781 transitions. [2021-08-06 14:11:24,880 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 75781 transitions. Word has length 27 [2021-08-06 14:11:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:24,880 INFO L470 AbstractCegarLoop]: Abstraction has 20191 states and 75781 transitions. [2021-08-06 14:11:24,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 75781 transitions. [2021-08-06 14:11:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:24,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:24,913 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:24,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 14:11:25,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:25,113 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:25,114 INFO L82 PathProgramCache]: Analyzing trace with hash -183946998, now seen corresponding path program 75 times [2021-08-06 14:11:25,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:25,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515623892] [2021-08-06 14:11:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:25,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:25,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:25,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515623892] [2021-08-06 14:11:25,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515623892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:25,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306907577] [2021-08-06 14:11:25,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:11:25,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:25,233 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:25,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 14:11:26,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:11:26,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:26,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:27,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306907577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:27,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:27,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:27,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543895757] [2021-08-06 14:11:27,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:27,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:27,382 INFO L87 Difference]: Start difference. First operand 20191 states and 75781 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:27,719 INFO L93 Difference]: Finished difference Result 20587 states and 76895 transitions. [2021-08-06 14:11:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:11:27,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:27,770 INFO L225 Difference]: With dead ends: 20587 [2021-08-06 14:11:27,770 INFO L226 Difference]: Without dead ends: 20503 [2021-08-06 14:11:27,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20503 states. [2021-08-06 14:11:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20503 to 20267. [2021-08-06 14:11:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20267 states, 20266 states have (on average 3.7536267640382905) internal successors, (76071), 20266 states have internal predecessors, (76071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20267 states to 20267 states and 76071 transitions. [2021-08-06 14:11:28,275 INFO L78 Accepts]: Start accepts. Automaton has 20267 states and 76071 transitions. Word has length 27 [2021-08-06 14:11:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:28,275 INFO L470 AbstractCegarLoop]: Abstraction has 20267 states and 76071 transitions. [2021-08-06 14:11:28,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 20267 states and 76071 transitions. [2021-08-06 14:11:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:28,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:28,312 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:28,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 14:11:28,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:28,512 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:28,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1105734706, now seen corresponding path program 76 times [2021-08-06 14:11:28,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:28,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608430914] [2021-08-06 14:11:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:28,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:28,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:28,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608430914] [2021-08-06 14:11:28,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608430914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:28,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169188280] [2021-08-06 14:11:28,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:11:28,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:28,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:28,644 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:28,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 14:11:30,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:11:30,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:30,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:30,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:30,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169188280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:30,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:30,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:30,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721149777] [2021-08-06 14:11:30,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:30,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:30,866 INFO L87 Difference]: Start difference. First operand 20267 states and 76071 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:31,191 INFO L93 Difference]: Finished difference Result 20679 states and 77249 transitions. [2021-08-06 14:11:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:31,244 INFO L225 Difference]: With dead ends: 20679 [2021-08-06 14:11:31,244 INFO L226 Difference]: Without dead ends: 20649 [2021-08-06 14:11:31,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20649 states. [2021-08-06 14:11:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20649 to 20283. [2021-08-06 14:11:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20283 states, 20282 states have (on average 3.7553988758505077) internal successors, (76167), 20282 states have internal predecessors, (76167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 76167 transitions. [2021-08-06 14:11:31,736 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 76167 transitions. Word has length 27 [2021-08-06 14:11:31,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:31,736 INFO L470 AbstractCegarLoop]: Abstraction has 20283 states and 76167 transitions. [2021-08-06 14:11:31,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 76167 transitions. [2021-08-06 14:11:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:31,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:31,773 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:31,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 14:11:31,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:31,973 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash -542120122, now seen corresponding path program 77 times [2021-08-06 14:11:31,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:31,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116807594] [2021-08-06 14:11:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:31,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:32,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:32,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116807594] [2021-08-06 14:11:32,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116807594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:32,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226072440] [2021-08-06 14:11:32,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:11:32,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:32,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:32,094 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:32,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 14:11:33,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:11:33,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:33,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:34,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226072440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:34,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:34,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:34,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010563319] [2021-08-06 14:11:34,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:34,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:34,323 INFO L87 Difference]: Start difference. First operand 20283 states and 76167 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:34,678 INFO L93 Difference]: Finished difference Result 20711 states and 77397 transitions. [2021-08-06 14:11:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:34,740 INFO L225 Difference]: With dead ends: 20711 [2021-08-06 14:11:34,740 INFO L226 Difference]: Without dead ends: 20681 [2021-08-06 14:11:34,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20681 states. [2021-08-06 14:11:35,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20681 to 20355. [2021-08-06 14:11:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20355 states, 20354 states have (on average 3.7547902132259017) internal successors, (76425), 20354 states have internal predecessors, (76425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20355 states to 20355 states and 76425 transitions. [2021-08-06 14:11:35,269 INFO L78 Accepts]: Start accepts. Automaton has 20355 states and 76425 transitions. Word has length 27 [2021-08-06 14:11:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:35,269 INFO L470 AbstractCegarLoop]: Abstraction has 20355 states and 76425 transitions. [2021-08-06 14:11:35,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 20355 states and 76425 transitions. [2021-08-06 14:11:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:35,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:35,307 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:35,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 14:11:35,507 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,SelfDestructingSolverStorable86 [2021-08-06 14:11:35,508 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1463907830, now seen corresponding path program 78 times [2021-08-06 14:11:35,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:35,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503428496] [2021-08-06 14:11:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:35,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:35,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:35,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503428496] [2021-08-06 14:11:35,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503428496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:35,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418466773] [2021-08-06 14:11:35,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:11:35,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:35,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:35,634 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:35,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 14:11:37,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:11:37,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:37,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:37,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:37,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418466773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:37,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:37,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:37,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984698046] [2021-08-06 14:11:37,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:37,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:37,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:37,894 INFO L87 Difference]: Start difference. First operand 20355 states and 76425 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:38,357 INFO L93 Difference]: Finished difference Result 20755 states and 77508 transitions. [2021-08-06 14:11:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:38,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:38,410 INFO L225 Difference]: With dead ends: 20755 [2021-08-06 14:11:38,410 INFO L226 Difference]: Without dead ends: 20675 [2021-08-06 14:11:38,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:11:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20675 states. [2021-08-06 14:11:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20675 to 20381. [2021-08-06 14:11:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20381 states, 20380 states have (on average 3.7561334641805693) internal successors, (76550), 20380 states have internal predecessors, (76550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20381 states to 20381 states and 76550 transitions. [2021-08-06 14:11:38,780 INFO L78 Accepts]: Start accepts. Automaton has 20381 states and 76550 transitions. Word has length 27 [2021-08-06 14:11:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:38,781 INFO L470 AbstractCegarLoop]: Abstraction has 20381 states and 76550 transitions. [2021-08-06 14:11:38,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 20381 states and 76550 transitions. [2021-08-06 14:11:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:11:38,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:38,815 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:38,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 14:11:39,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 14:11:39,017 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 741935370, now seen corresponding path program 79 times [2021-08-06 14:11:39,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:39,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329188981] [2021-08-06 14:11:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:39,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:39,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:39,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329188981] [2021-08-06 14:11:39,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329188981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:39,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694969486] [2021-08-06 14:11:39,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:11:39,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:39,140 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:39,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 14:11:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:41,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 14:11:41,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:41,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694969486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:41,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:41,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 14:11:41,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914199505] [2021-08-06 14:11:41,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:11:41,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:11:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:11:41,564 INFO L87 Difference]: Start difference. First operand 20381 states and 76550 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:41,981 INFO L93 Difference]: Finished difference Result 20546 states and 77039 transitions. [2021-08-06 14:11:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:11:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:11:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:42,042 INFO L225 Difference]: With dead ends: 20546 [2021-08-06 14:11:42,042 INFO L226 Difference]: Without dead ends: 20531 [2021-08-06 14:11:42,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:11:42,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20531 states. [2021-08-06 14:11:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20531 to 20369. [2021-08-06 14:11:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20369 states, 20368 states have (on average 3.7567753338570307) internal successors, (76518), 20368 states have internal predecessors, (76518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20369 states to 20369 states and 76518 transitions. [2021-08-06 14:11:42,450 INFO L78 Accepts]: Start accepts. Automaton has 20369 states and 76518 transitions. Word has length 27 [2021-08-06 14:11:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:42,450 INFO L470 AbstractCegarLoop]: Abstraction has 20369 states and 76518 transitions. [2021-08-06 14:11:42,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20369 states and 76518 transitions. [2021-08-06 14:11:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:11:42,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:42,487 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:42,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 14:11:42,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-06 14:11:42,687 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:42,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1010428170, now seen corresponding path program 80 times [2021-08-06 14:11:42,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:42,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275450526] [2021-08-06 14:11:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:42,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:11:42,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:42,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275450526] [2021-08-06 14:11:42,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275450526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:42,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582592632] [2021-08-06 14:11:42,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:11:42,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:42,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:42,745 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:42,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 14:11:44,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:11:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:11:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:11:44,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582592632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:44,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:44,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:11:44,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588361090] [2021-08-06 14:11:44,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:11:44,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:44,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:11:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:11:44,896 INFO L87 Difference]: Start difference. First operand 20369 states and 76518 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 14:11:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:45,154 INFO L93 Difference]: Finished difference Result 27341 states and 98943 transitions. [2021-08-06 14:11:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:11:45,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) Word has length 29 [2021-08-06 14:11:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:45,250 INFO L225 Difference]: With dead ends: 27341 [2021-08-06 14:11:45,250 INFO L226 Difference]: Without dead ends: 27273 [2021-08-06 14:11:45,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:11:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27273 states. [2021-08-06 14:11:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27273 to 20719. [2021-08-06 14:11:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20719 states, 20718 states have (on average 3.7288348296167584) internal successors, (77254), 20718 states have internal predecessors, (77254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20719 states to 20719 states and 77254 transitions. [2021-08-06 14:11:45,750 INFO L78 Accepts]: Start accepts. Automaton has 20719 states and 77254 transitions. Word has length 29 [2021-08-06 14:11:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:45,750 INFO L470 AbstractCegarLoop]: Abstraction has 20719 states and 77254 transitions. [2021-08-06 14:11:45,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-08-06 14:11:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20719 states and 77254 transitions. [2021-08-06 14:11:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:11:45,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:45,791 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:45,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 14:11:45,991 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,SelfDestructingSolverStorable89 [2021-08-06 14:11:45,991 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:45,992 INFO L82 PathProgramCache]: Analyzing trace with hash -917674058, now seen corresponding path program 81 times [2021-08-06 14:11:45,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:45,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258833166] [2021-08-06 14:11:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:45,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:11:46,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:46,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258833166] [2021-08-06 14:11:46,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258833166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:46,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724204493] [2021-08-06 14:11:46,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:11:46,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:46,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:46,039 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:46,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 14:11:48,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:11:48,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:48,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:11:48,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:11:48,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724204493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:48,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:48,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 14:11:48,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490155949] [2021-08-06 14:11:48,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:11:48,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:11:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:11:48,245 INFO L87 Difference]: Start difference. First operand 20719 states and 77254 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:49,347 INFO L93 Difference]: Finished difference Result 35301 states and 125797 transitions. [2021-08-06 14:11:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 14:11:49,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:11:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:49,455 INFO L225 Difference]: With dead ends: 35301 [2021-08-06 14:11:49,455 INFO L226 Difference]: Without dead ends: 34738 [2021-08-06 14:11:49,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 14:11:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34738 states. [2021-08-06 14:11:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34738 to 25428. [2021-08-06 14:11:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25428 states, 25427 states have (on average 3.697880206080151) internal successors, (94026), 25427 states have internal predecessors, (94026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25428 states to 25428 states and 94026 transitions. [2021-08-06 14:11:50,158 INFO L78 Accepts]: Start accepts. Automaton has 25428 states and 94026 transitions. Word has length 29 [2021-08-06 14:11:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:50,158 INFO L470 AbstractCegarLoop]: Abstraction has 25428 states and 94026 transitions. [2021-08-06 14:11:50,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 25428 states and 94026 transitions. [2021-08-06 14:11:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:11:50,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:50,213 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:50,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 14:11:50,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:50,414 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash -33618958, now seen corresponding path program 82 times [2021-08-06 14:11:50,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:50,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954076776] [2021-08-06 14:11:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:50,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:11:50,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:50,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954076776] [2021-08-06 14:11:50,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954076776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:50,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744670919] [2021-08-06 14:11:50,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:11:50,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:50,466 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:50,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 14:11:52,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:11:52,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:52,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:11:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:11:52,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744670919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:52,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:52,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:11:52,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270395211] [2021-08-06 14:11:52,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:11:52,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:52,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:11:52,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:11:52,541 INFO L87 Difference]: Start difference. First operand 25428 states and 94026 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:52,847 INFO L93 Difference]: Finished difference Result 38107 states and 139149 transitions. [2021-08-06 14:11:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:11:52,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:11:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:52,969 INFO L225 Difference]: With dead ends: 38107 [2021-08-06 14:11:52,969 INFO L226 Difference]: Without dead ends: 37763 [2021-08-06 14:11:52,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:11:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37763 states. [2021-08-06 14:11:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37763 to 33016. [2021-08-06 14:11:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33016 states, 33015 states have (on average 3.7431167651067696) internal successors, (123579), 33015 states have internal predecessors, (123579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33016 states to 33016 states and 123579 transitions. [2021-08-06 14:11:53,926 INFO L78 Accepts]: Start accepts. Automaton has 33016 states and 123579 transitions. Word has length 29 [2021-08-06 14:11:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:53,926 INFO L470 AbstractCegarLoop]: Abstraction has 33016 states and 123579 transitions. [2021-08-06 14:11:53,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 33016 states and 123579 transitions. [2021-08-06 14:11:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:11:53,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:53,997 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:54,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 14:11:54,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:54,198 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:54,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1898986962, now seen corresponding path program 83 times [2021-08-06 14:11:54,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:54,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932513681] [2021-08-06 14:11:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:54,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:11:54,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:54,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932513681] [2021-08-06 14:11:54,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932513681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:54,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415197981] [2021-08-06 14:11:54,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:11:54,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:54,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:54,247 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:54,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 14:11:56,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 14:11:56,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:11:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:11:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:11:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:11:56,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415197981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:56,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:11:56,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:11:56,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995255800] [2021-08-06 14:11:56,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:11:56,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:11:56,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:11:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:11:56,471 INFO L87 Difference]: Start difference. First operand 33016 states and 123579 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:11:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:11:56,749 INFO L93 Difference]: Finished difference Result 35152 states and 129447 transitions. [2021-08-06 14:11:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:11:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) Word has length 29 [2021-08-06 14:11:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:11:56,868 INFO L225 Difference]: With dead ends: 35152 [2021-08-06 14:11:56,868 INFO L226 Difference]: Without dead ends: 35081 [2021-08-06 14:11:56,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:11:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35081 states. [2021-08-06 14:11:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35081 to 32774. [2021-08-06 14:11:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32774 states, 32773 states have (on average 3.742409910597138) internal successors, (122650), 32773 states have internal predecessors, (122650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:11:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32774 states to 32774 states and 122650 transitions. [2021-08-06 14:11:57,680 INFO L78 Accepts]: Start accepts. Automaton has 32774 states and 122650 transitions. Word has length 29 [2021-08-06 14:11:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:11:57,680 INFO L470 AbstractCegarLoop]: Abstraction has 32774 states and 122650 transitions. [2021-08-06 14:11:57,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:11:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32774 states and 122650 transitions. [2021-08-06 14:11:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:11:57,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:11:57,754 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:11:57,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 14:11:57,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:57,954 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:11:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:11:57,955 INFO L82 PathProgramCache]: Analyzing trace with hash 842585650, now seen corresponding path program 84 times [2021-08-06 14:11:57,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:11:57,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14728705] [2021-08-06 14:11:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:11:57,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:11:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:11:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:11:58,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:11:58,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14728705] [2021-08-06 14:11:58,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14728705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:11:58,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462401136] [2021-08-06 14:11:58,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:11:58,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:11:58,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:11:58,151 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:11:58,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 14:12:00,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:12:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:12:00,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462401136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:00,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:00,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-08-06 14:12:00,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421429521] [2021-08-06 14:12:00,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:12:00,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:00,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:12:00,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:12:00,267 INFO L87 Difference]: Start difference. First operand 32774 states and 122650 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:01,757 INFO L93 Difference]: Finished difference Result 56641 states and 204091 transitions. [2021-08-06 14:12:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 14:12:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:12:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:01,977 INFO L225 Difference]: With dead ends: 56641 [2021-08-06 14:12:01,977 INFO L226 Difference]: Without dead ends: 56277 [2021-08-06 14:12:01,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2044 ImplicationChecksByTransitivity, 668.4ms TimeCoverageRelationStatistics Valid=1127, Invalid=4423, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 14:12:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56277 states. [2021-08-06 14:12:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56277 to 39864. [2021-08-06 14:12:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39864 states, 39863 states have (on average 3.7525775782053534) internal successors, (149589), 39863 states have internal predecessors, (149589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39864 states to 39864 states and 149589 transitions. [2021-08-06 14:12:03,563 INFO L78 Accepts]: Start accepts. Automaton has 39864 states and 149589 transitions. Word has length 29 [2021-08-06 14:12:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:03,563 INFO L470 AbstractCegarLoop]: Abstraction has 39864 states and 149589 transitions. [2021-08-06 14:12:03,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 39864 states and 149589 transitions. [2021-08-06 14:12:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:03,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:03,642 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:03,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 14:12:03,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:03,842 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:03,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1341111586, now seen corresponding path program 85 times [2021-08-06 14:12:03,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:03,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516199619] [2021-08-06 14:12:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:03,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:04,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:04,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516199619] [2021-08-06 14:12:04,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516199619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:04,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751298578] [2021-08-06 14:12:04,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:12:04,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:04,125 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:04,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 14:12:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:06,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:06,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751298578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:06,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:06,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:12:06,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888208226] [2021-08-06 14:12:06,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:12:06,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:06,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:12:06,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:12:06,303 INFO L87 Difference]: Start difference. First operand 39864 states and 149589 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:12:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:06,703 INFO L93 Difference]: Finished difference Result 56084 states and 207895 transitions. [2021-08-06 14:12:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:12:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) Word has length 29 [2021-08-06 14:12:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:06,931 INFO L225 Difference]: With dead ends: 56084 [2021-08-06 14:12:06,932 INFO L226 Difference]: Without dead ends: 56028 [2021-08-06 14:12:06,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:12:06,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56028 states. [2021-08-06 14:12:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56028 to 50223. [2021-08-06 14:12:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50223 states, 50222 states have (on average 3.797359722830632) internal successors, (190711), 50222 states have internal predecessors, (190711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50223 states to 50223 states and 190711 transitions. [2021-08-06 14:12:08,764 INFO L78 Accepts]: Start accepts. Automaton has 50223 states and 190711 transitions. Word has length 29 [2021-08-06 14:12:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:08,764 INFO L470 AbstractCegarLoop]: Abstraction has 50223 states and 190711 transitions. [2021-08-06 14:12:08,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:12:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 50223 states and 190711 transitions. [2021-08-06 14:12:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:08,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:08,891 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:08,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 14:12:09,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:09,092 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash -682534686, now seen corresponding path program 86 times [2021-08-06 14:12:09,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:09,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712675120] [2021-08-06 14:12:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:09,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:09,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:09,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712675120] [2021-08-06 14:12:09,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712675120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:09,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146720502] [2021-08-06 14:12:09,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:12:09,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:09,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:09,309 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:09,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 14:12:11,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:12:11,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:11,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146720502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:11,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:11,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:12:11,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104549717] [2021-08-06 14:12:11,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:12:11,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:12:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:12:11,474 INFO L87 Difference]: Start difference. First operand 50223 states and 190711 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:12:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:11,871 INFO L93 Difference]: Finished difference Result 57339 states and 212221 transitions. [2021-08-06 14:12:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:12:11,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) Word has length 29 [2021-08-06 14:12:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:12,234 INFO L225 Difference]: With dead ends: 57339 [2021-08-06 14:12:12,234 INFO L226 Difference]: Without dead ends: 57310 [2021-08-06 14:12:12,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:12:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57310 states. [2021-08-06 14:12:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57310 to 50272. [2021-08-06 14:12:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50272 states, 50271 states have (on average 3.786099341568698) internal successors, (190331), 50271 states have internal predecessors, (190331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50272 states to 50272 states and 190331 transitions. [2021-08-06 14:12:13,950 INFO L78 Accepts]: Start accepts. Automaton has 50272 states and 190331 transitions. Word has length 29 [2021-08-06 14:12:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:13,950 INFO L470 AbstractCegarLoop]: Abstraction has 50272 states and 190331 transitions. [2021-08-06 14:12:13,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:12:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 50272 states and 190331 transitions. [2021-08-06 14:12:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:14,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:14,061 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:14,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 14:12:14,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-06 14:12:14,261 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash 536555628, now seen corresponding path program 87 times [2021-08-06 14:12:14,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:14,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551765234] [2021-08-06 14:12:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:14,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:14,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:14,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551765234] [2021-08-06 14:12:14,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551765234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:14,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139074417] [2021-08-06 14:12:14,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:12:14,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:14,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:14,312 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:14,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 14:12:16,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:12:16,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:16,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:16,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:16,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139074417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:16,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:16,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-06 14:12:16,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543329006] [2021-08-06 14:12:16,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:12:16,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:16,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:12:16,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:12:16,652 INFO L87 Difference]: Start difference. First operand 50272 states and 190331 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:18,550 INFO L93 Difference]: Finished difference Result 117337 states and 415357 transitions. [2021-08-06 14:12:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 14:12:18,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:12:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:19,308 INFO L225 Difference]: With dead ends: 117337 [2021-08-06 14:12:19,308 INFO L226 Difference]: Without dead ends: 116199 [2021-08-06 14:12:19,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 694.0ms TimeCoverageRelationStatistics Valid=1281, Invalid=4725, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 14:12:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116199 states. [2021-08-06 14:12:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116199 to 67558. [2021-08-06 14:12:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67558 states, 67557 states have (on average 3.7786757848927572) internal successors, (255276), 67557 states have internal predecessors, (255276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67558 states to 67558 states and 255276 transitions. [2021-08-06 14:12:22,423 INFO L78 Accepts]: Start accepts. Automaton has 67558 states and 255276 transitions. Word has length 29 [2021-08-06 14:12:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:22,423 INFO L470 AbstractCegarLoop]: Abstraction has 67558 states and 255276 transitions. [2021-08-06 14:12:22,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 67558 states and 255276 transitions. [2021-08-06 14:12:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:22,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:22,591 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:22,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 14:12:22,792 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,SelfDestructingSolverStorable96 [2021-08-06 14:12:22,792 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:22,792 INFO L82 PathProgramCache]: Analyzing trace with hash -697254492, now seen corresponding path program 88 times [2021-08-06 14:12:22,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:22,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288730563] [2021-08-06 14:12:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:22,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:22,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:22,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288730563] [2021-08-06 14:12:22,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288730563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:22,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681561371] [2021-08-06 14:12:22,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:12:22,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:22,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:22,850 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:22,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 14:12:25,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:12:25,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:25,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:25,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681561371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:25,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:25,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:12:25,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705249724] [2021-08-06 14:12:25,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:12:25,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:12:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:12:25,239 INFO L87 Difference]: Start difference. First operand 67558 states and 255276 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:12:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:25,760 INFO L93 Difference]: Finished difference Result 75327 states and 277375 transitions. [2021-08-06 14:12:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:12:25,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) Word has length 29 [2021-08-06 14:12:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:26,275 INFO L225 Difference]: With dead ends: 75327 [2021-08-06 14:12:26,276 INFO L226 Difference]: Without dead ends: 75003 [2021-08-06 14:12:26,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:12:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75003 states. [2021-08-06 14:12:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75003 to 60322. [2021-08-06 14:12:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60322 states, 60321 states have (on average 3.7534026292667564) internal successors, (226409), 60321 states have internal predecessors, (226409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60322 states to 60322 states and 226409 transitions. [2021-08-06 14:12:28,347 INFO L78 Accepts]: Start accepts. Automaton has 60322 states and 226409 transitions. Word has length 29 [2021-08-06 14:12:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:28,347 INFO L470 AbstractCegarLoop]: Abstraction has 60322 states and 226409 transitions. [2021-08-06 14:12:28,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:12:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 60322 states and 226409 transitions. [2021-08-06 14:12:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:28,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:28,846 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:28,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 14:12:29,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:29,053 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash 599309834, now seen corresponding path program 89 times [2021-08-06 14:12:29,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:29,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527881354] [2021-08-06 14:12:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:29,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:29,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:29,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527881354] [2021-08-06 14:12:29,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527881354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:29,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231672574] [2021-08-06 14:12:29,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:12:29,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:29,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:29,113 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:29,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 14:12:31,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 14:12:31,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:31,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:12:31,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231672574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:31,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:31,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-06 14:12:31,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008606570] [2021-08-06 14:12:31,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:12:31,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:12:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:12:31,566 INFO L87 Difference]: Start difference. First operand 60322 states and 226409 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:32,583 INFO L93 Difference]: Finished difference Result 74249 states and 265078 transitions. [2021-08-06 14:12:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 14:12:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:12:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:32,880 INFO L225 Difference]: With dead ends: 74249 [2021-08-06 14:12:32,880 INFO L226 Difference]: Without dead ends: 73746 [2021-08-06 14:12:32,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 14:12:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73746 states. [2021-08-06 14:12:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73746 to 57074. [2021-08-06 14:12:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57074 states, 57073 states have (on average 3.76279501690817) internal successors, (214754), 57073 states have internal predecessors, (214754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57074 states to 57074 states and 214754 transitions. [2021-08-06 14:12:35,220 INFO L78 Accepts]: Start accepts. Automaton has 57074 states and 214754 transitions. Word has length 29 [2021-08-06 14:12:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:35,221 INFO L470 AbstractCegarLoop]: Abstraction has 57074 states and 214754 transitions. [2021-08-06 14:12:35,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 57074 states and 214754 transitions. [2021-08-06 14:12:35,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:35,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:35,355 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:35,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 14:12:35,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:35,556 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:35,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1942865824, now seen corresponding path program 90 times [2021-08-06 14:12:35,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:35,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476305463] [2021-08-06 14:12:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:35,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:35,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:35,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476305463] [2021-08-06 14:12:35,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476305463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:35,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800318019] [2021-08-06 14:12:35,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:12:35,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:35,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:35,604 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:35,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 14:12:37,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:12:37,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 14:12:38,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800318019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:38,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:38,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:12:38,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253749375] [2021-08-06 14:12:38,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:12:38,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:12:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:12:38,101 INFO L87 Difference]: Start difference. First operand 57074 states and 214754 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:38,646 INFO L93 Difference]: Finished difference Result 64657 states and 238093 transitions. [2021-08-06 14:12:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:12:38,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:12:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:38,889 INFO L225 Difference]: With dead ends: 64657 [2021-08-06 14:12:38,889 INFO L226 Difference]: Without dead ends: 64634 [2021-08-06 14:12:38,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:12:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64634 states. [2021-08-06 14:12:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64634 to 50514. [2021-08-06 14:12:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50514 states, 50513 states have (on average 3.757765327737414) internal successors, (189816), 50513 states have internal predecessors, (189816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50514 states to 50514 states and 189816 transitions. [2021-08-06 14:12:40,391 INFO L78 Accepts]: Start accepts. Automaton has 50514 states and 189816 transitions. Word has length 29 [2021-08-06 14:12:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:40,391 INFO L470 AbstractCegarLoop]: Abstraction has 50514 states and 189816 transitions. [2021-08-06 14:12:40,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 50514 states and 189816 transitions. [2021-08-06 14:12:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:40,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:40,736 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:40,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 14:12:40,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:40,961 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -926258780, now seen corresponding path program 91 times [2021-08-06 14:12:40,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:40,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568171023] [2021-08-06 14:12:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:40,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:41,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:41,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568171023] [2021-08-06 14:12:41,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568171023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:41,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29995725] [2021-08-06 14:12:41,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:12:41,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:41,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:41,007 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:41,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 14:12:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:43,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:43,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29995725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:43,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:43,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-06 14:12:43,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369993535] [2021-08-06 14:12:43,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:12:43,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:12:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:12:43,459 INFO L87 Difference]: Start difference. First operand 50514 states and 189816 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:44,440 INFO L93 Difference]: Finished difference Result 87264 states and 315223 transitions. [2021-08-06 14:12:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 14:12:44,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:12:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:44,775 INFO L225 Difference]: With dead ends: 87264 [2021-08-06 14:12:44,776 INFO L226 Difference]: Without dead ends: 87120 [2021-08-06 14:12:44,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:12:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87120 states. [2021-08-06 14:12:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87120 to 62177. [2021-08-06 14:12:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62177 states, 62176 states have (on average 3.780783582089552) internal successors, (235074), 62176 states have internal predecessors, (235074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62177 states to 62177 states and 235074 transitions. [2021-08-06 14:12:47,623 INFO L78 Accepts]: Start accepts. Automaton has 62177 states and 235074 transitions. Word has length 29 [2021-08-06 14:12:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:47,624 INFO L470 AbstractCegarLoop]: Abstraction has 62177 states and 235074 transitions. [2021-08-06 14:12:47,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 62177 states and 235074 transitions. [2021-08-06 14:12:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:47,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:47,865 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:47,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 14:12:48,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 14:12:48,085 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash -760844632, now seen corresponding path program 92 times [2021-08-06 14:12:48,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:48,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504673872] [2021-08-06 14:12:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:48,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:12:48,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:48,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504673872] [2021-08-06 14:12:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504673872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:48,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626757828] [2021-08-06 14:12:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:12:48,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:48,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:48,193 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:48,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 14:12:50,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:12:50,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:50,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:51,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626757828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:51,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:51,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 14:12:51,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563988496] [2021-08-06 14:12:51,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:12:51,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:51,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:12:51,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:12:51,085 INFO L87 Difference]: Start difference. First operand 62177 states and 235074 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:52,463 INFO L93 Difference]: Finished difference Result 92085 states and 326523 transitions. [2021-08-06 14:12:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 14:12:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:12:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:52,824 INFO L225 Difference]: With dead ends: 92085 [2021-08-06 14:12:52,824 INFO L226 Difference]: Without dead ends: 91977 [2021-08-06 14:12:52,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=976, Invalid=3716, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 14:12:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91977 states. [2021-08-06 14:12:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91977 to 63304. [2021-08-06 14:12:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63304 states, 63303 states have (on average 3.7600587649874413) internal successors, (238023), 63303 states have internal predecessors, (238023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63304 states to 63304 states and 238023 transitions. [2021-08-06 14:12:55,419 INFO L78 Accepts]: Start accepts. Automaton has 63304 states and 238023 transitions. Word has length 29 [2021-08-06 14:12:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:12:55,419 INFO L470 AbstractCegarLoop]: Abstraction has 63304 states and 238023 transitions. [2021-08-06 14:12:55,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:12:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 63304 states and 238023 transitions. [2021-08-06 14:12:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:12:55,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:12:55,549 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:12:55,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 14:12:55,750 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,SelfDestructingSolverStorable101 [2021-08-06 14:12:55,750 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:12:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:12:55,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1914648104, now seen corresponding path program 93 times [2021-08-06 14:12:55,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:12:55,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470759994] [2021-08-06 14:12:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:12:55,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:12:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:12:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:12:55,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:12:55,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470759994] [2021-08-06 14:12:55,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470759994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:55,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518108420] [2021-08-06 14:12:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:12:55,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:12:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:12:55,793 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:12:55,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 14:12:58,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:12:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:12:58,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:12:58,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:12:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:12:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518108420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:12:58,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:12:58,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:12:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771477931] [2021-08-06 14:12:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:12:58,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:12:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:12:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:12:58,312 INFO L87 Difference]: Start difference. First operand 63304 states and 238023 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:12:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:12:58,880 INFO L93 Difference]: Finished difference Result 74020 states and 273764 transitions. [2021-08-06 14:12:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:12:58,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) Word has length 29 [2021-08-06 14:12:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:12:59,169 INFO L225 Difference]: With dead ends: 74020 [2021-08-06 14:12:59,169 INFO L226 Difference]: Without dead ends: 73875 [2021-08-06 14:12:59,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:12:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73875 states. [2021-08-06 14:13:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73875 to 61109. [2021-08-06 14:13:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61109 states, 61108 states have (on average 3.7586077109380116) internal successors, (229681), 61108 states have internal predecessors, (229681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61109 states to 61109 states and 229681 transitions. [2021-08-06 14:13:01,157 INFO L78 Accepts]: Start accepts. Automaton has 61109 states and 229681 transitions. Word has length 29 [2021-08-06 14:13:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:01,157 INFO L470 AbstractCegarLoop]: Abstraction has 61109 states and 229681 transitions. [2021-08-06 14:13:01,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:13:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 61109 states and 229681 transitions. [2021-08-06 14:13:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:01,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:01,273 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:01,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 14:13:01,473 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,SelfDestructingSolverStorable102 [2021-08-06 14:13:01,474 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1721742292, now seen corresponding path program 94 times [2021-08-06 14:13:01,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:01,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841753748] [2021-08-06 14:13:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:01,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:01,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:01,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841753748] [2021-08-06 14:13:01,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841753748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:01,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748798813] [2021-08-06 14:13:01,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:13:01,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:01,519 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:01,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 14:13:03,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:13:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:03,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:04,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748798813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:04,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:04,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:13:04,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341673809] [2021-08-06 14:13:04,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:13:04,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:13:04,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:13:04,010 INFO L87 Difference]: Start difference. First operand 61109 states and 229681 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:13:04,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:04,558 INFO L93 Difference]: Finished difference Result 70101 states and 257893 transitions. [2021-08-06 14:13:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) Word has length 29 [2021-08-06 14:13:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:04,827 INFO L225 Difference]: With dead ends: 70101 [2021-08-06 14:13:04,827 INFO L226 Difference]: Without dead ends: 70079 [2021-08-06 14:13:04,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:13:04,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70079 states. [2021-08-06 14:13:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70079 to 55319. [2021-08-06 14:13:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55319 states, 55318 states have (on average 3.741928486207021) internal successors, (206996), 55318 states have internal predecessors, (206996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55319 states to 55319 states and 206996 transitions. [2021-08-06 14:13:06,484 INFO L78 Accepts]: Start accepts. Automaton has 55319 states and 206996 transitions. Word has length 29 [2021-08-06 14:13:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:06,484 INFO L470 AbstractCegarLoop]: Abstraction has 55319 states and 206996 transitions. [2021-08-06 14:13:06,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:13:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 55319 states and 206996 transitions. [2021-08-06 14:13:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:06,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:06,940 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:06,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 14:13:07,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 14:13:07,150 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2146053528, now seen corresponding path program 95 times [2021-08-06 14:13:07,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:07,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250384896] [2021-08-06 14:13:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:07,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:07,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:07,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250384896] [2021-08-06 14:13:07,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250384896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:07,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852615441] [2021-08-06 14:13:07,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:13:07,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:07,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:07,220 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:07,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 14:13:09,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:13:09,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:09,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:09,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:09,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852615441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:09,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:09,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:13:09,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813416574] [2021-08-06 14:13:09,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:13:09,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:13:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:13:09,684 INFO L87 Difference]: Start difference. First operand 55319 states and 206996 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-08-06 14:13:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:10,144 INFO L93 Difference]: Finished difference Result 63547 states and 231109 transitions. [2021-08-06 14:13:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:10,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) Word has length 29 [2021-08-06 14:13:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:10,385 INFO L225 Difference]: With dead ends: 63547 [2021-08-06 14:13:10,385 INFO L226 Difference]: Without dead ends: 63458 [2021-08-06 14:13:10,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:13:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63458 states. [2021-08-06 14:13:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63458 to 55292. [2021-08-06 14:13:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55292 states, 55291 states have (on average 3.717006384402525) internal successors, (205517), 55291 states have internal predecessors, (205517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55292 states to 55292 states and 205517 transitions. [2021-08-06 14:13:12,205 INFO L78 Accepts]: Start accepts. Automaton has 55292 states and 205517 transitions. Word has length 29 [2021-08-06 14:13:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:12,206 INFO L470 AbstractCegarLoop]: Abstraction has 55292 states and 205517 transitions. [2021-08-06 14:13:12,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-08-06 14:13:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 55292 states and 205517 transitions. [2021-08-06 14:13:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:12,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:12,308 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:12,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 14:13:12,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:12,508 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1498722772, now seen corresponding path program 96 times [2021-08-06 14:13:12,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:12,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526284988] [2021-08-06 14:13:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:12,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:12,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:12,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526284988] [2021-08-06 14:13:12,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526284988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:12,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74356802] [2021-08-06 14:13:12,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:13:12,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:12,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:12,565 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:12,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 14:13:14,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:13:14,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:14,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:14,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:15,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74356802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:15,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:15,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:13:15,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485480625] [2021-08-06 14:13:15,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:13:15,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:13:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:13:15,057 INFO L87 Difference]: Start difference. First operand 55292 states and 205517 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:15,533 INFO L93 Difference]: Finished difference Result 64486 states and 233536 transitions. [2021-08-06 14:13:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:13:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:15,948 INFO L225 Difference]: With dead ends: 64486 [2021-08-06 14:13:15,948 INFO L226 Difference]: Without dead ends: 64428 [2021-08-06 14:13:15,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:13:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64428 states. [2021-08-06 14:13:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64428 to 55425. [2021-08-06 14:13:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55425 states, 55424 states have (on average 3.699787095842956) internal successors, (205057), 55424 states have internal predecessors, (205057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55425 states to 55425 states and 205057 transitions. [2021-08-06 14:13:17,561 INFO L78 Accepts]: Start accepts. Automaton has 55425 states and 205057 transitions. Word has length 29 [2021-08-06 14:13:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:17,562 INFO L470 AbstractCegarLoop]: Abstraction has 55425 states and 205057 transitions. [2021-08-06 14:13:17,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 55425 states and 205057 transitions. [2021-08-06 14:13:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:17,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:17,667 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:17,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 14:13:17,869 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,SelfDestructingSolverStorable105 [2021-08-06 14:13:17,869 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:17,869 INFO L82 PathProgramCache]: Analyzing trace with hash 201874180, now seen corresponding path program 97 times [2021-08-06 14:13:17,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:17,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746224713] [2021-08-06 14:13:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:17,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:17,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:17,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746224713] [2021-08-06 14:13:17,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746224713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:17,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164046752] [2021-08-06 14:13:17,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:13:17,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:17,930 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:17,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 14:13:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:20,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:20,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164046752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:20,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:20,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:13:20,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341997590] [2021-08-06 14:13:20,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:13:20,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:13:20,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:13:20,529 INFO L87 Difference]: Start difference. First operand 55425 states and 205057 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:20,981 INFO L93 Difference]: Finished difference Result 60408 states and 219574 transitions. [2021-08-06 14:13:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:13:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:21,194 INFO L225 Difference]: With dead ends: 60408 [2021-08-06 14:13:21,194 INFO L226 Difference]: Without dead ends: 60302 [2021-08-06 14:13:21,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:13:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60302 states. [2021-08-06 14:13:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60302 to 54967. [2021-08-06 14:13:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54967 states, 54966 states have (on average 3.7021613360986794) internal successors, (203493), 54966 states have internal predecessors, (203493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54967 states to 54967 states and 203493 transitions. [2021-08-06 14:13:22,649 INFO L78 Accepts]: Start accepts. Automaton has 54967 states and 203493 transitions. Word has length 29 [2021-08-06 14:13:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:22,649 INFO L470 AbstractCegarLoop]: Abstraction has 54967 states and 203493 transitions. [2021-08-06 14:13:22,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 54967 states and 203493 transitions. [2021-08-06 14:13:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:22,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:22,739 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:22,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 14:13:22,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:22,939 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:22,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2146387392, now seen corresponding path program 98 times [2021-08-06 14:13:22,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:22,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619434112] [2021-08-06 14:13:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:22,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:23,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:23,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619434112] [2021-08-06 14:13:23,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619434112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:23,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252870868] [2021-08-06 14:13:23,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:13:23,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:23,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:23,301 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:23,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 14:13:25,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:13:25,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:25,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:25,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252870868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:25,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:25,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:13:25,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034778935] [2021-08-06 14:13:25,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:13:25,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:13:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:13:25,702 INFO L87 Difference]: Start difference. First operand 54967 states and 203493 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:13:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:26,165 INFO L93 Difference]: Finished difference Result 65905 states and 241471 transitions. [2021-08-06 14:13:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:13:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) Word has length 29 [2021-08-06 14:13:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:26,405 INFO L225 Difference]: With dead ends: 65905 [2021-08-06 14:13:26,405 INFO L226 Difference]: Without dead ends: 65879 [2021-08-06 14:13:26,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:13:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65879 states. [2021-08-06 14:13:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65879 to 61271. [2021-08-06 14:13:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61271 states, 61270 states have (on average 3.721299167618737) internal successors, (228004), 61270 states have internal predecessors, (228004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61271 states to 61271 states and 228004 transitions. [2021-08-06 14:13:28,469 INFO L78 Accepts]: Start accepts. Automaton has 61271 states and 228004 transitions. Word has length 29 [2021-08-06 14:13:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:28,469 INFO L470 AbstractCegarLoop]: Abstraction has 61271 states and 228004 transitions. [2021-08-06 14:13:28,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-06 14:13:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 61271 states and 228004 transitions. [2021-08-06 14:13:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:28,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:28,584 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:28,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 14:13:28,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:28,785 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1003979584, now seen corresponding path program 99 times [2021-08-06 14:13:28,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:28,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545225165] [2021-08-06 14:13:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:28,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:28,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:28,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545225165] [2021-08-06 14:13:28,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545225165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:28,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138662834] [2021-08-06 14:13:28,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:13:28,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:28,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:28,832 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:28,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 14:13:31,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 14:13:31,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:31,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:31,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138662834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:31,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:31,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:13:31,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359108970] [2021-08-06 14:13:31,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:13:31,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:13:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:13:31,425 INFO L87 Difference]: Start difference. First operand 61271 states and 228004 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:32,808 INFO L93 Difference]: Finished difference Result 89608 states and 313025 transitions. [2021-08-06 14:13:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 14:13:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:13:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:33,384 INFO L225 Difference]: With dead ends: 89608 [2021-08-06 14:13:33,384 INFO L226 Difference]: Without dead ends: 89432 [2021-08-06 14:13:33,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=1094, Invalid=4018, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 14:13:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89432 states. [2021-08-06 14:13:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89432 to 57739. [2021-08-06 14:13:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57739 states, 57738 states have (on average 3.7083723024697774) internal successors, (214114), 57738 states have internal predecessors, (214114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57739 states to 57739 states and 214114 transitions. [2021-08-06 14:13:35,308 INFO L78 Accepts]: Start accepts. Automaton has 57739 states and 214114 transitions. Word has length 29 [2021-08-06 14:13:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:35,308 INFO L470 AbstractCegarLoop]: Abstraction has 57739 states and 214114 transitions. [2021-08-06 14:13:35,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 57739 states and 214114 transitions. [2021-08-06 14:13:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:36,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:36,040 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:36,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 14:13:36,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:36,269 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:36,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1545051940, now seen corresponding path program 100 times [2021-08-06 14:13:36,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:36,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055473815] [2021-08-06 14:13:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:36,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:36,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:36,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055473815] [2021-08-06 14:13:36,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055473815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:36,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347220897] [2021-08-06 14:13:36,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:13:36,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:36,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:36,354 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:36,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 14:13:38,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:13:38,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:38,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347220897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:38,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:38,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:13:38,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856895163] [2021-08-06 14:13:38,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:13:38,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:13:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:13:38,736 INFO L87 Difference]: Start difference. First operand 57739 states and 214114 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-08-06 14:13:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:39,191 INFO L93 Difference]: Finished difference Result 61856 states and 225599 transitions. [2021-08-06 14:13:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:39,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) Word has length 29 [2021-08-06 14:13:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:39,402 INFO L225 Difference]: With dead ends: 61856 [2021-08-06 14:13:39,403 INFO L226 Difference]: Without dead ends: 61594 [2021-08-06 14:13:39,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:13:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61594 states. [2021-08-06 14:13:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61594 to 57553. [2021-08-06 14:13:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57553 states, 57552 states have (on average 3.70763830970253) internal successors, (213382), 57552 states have internal predecessors, (213382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57553 states to 57553 states and 213382 transitions. [2021-08-06 14:13:40,864 INFO L78 Accepts]: Start accepts. Automaton has 57553 states and 213382 transitions. Word has length 29 [2021-08-06 14:13:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:40,865 INFO L470 AbstractCegarLoop]: Abstraction has 57553 states and 213382 transitions. [2021-08-06 14:13:40,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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) [2021-08-06 14:13:40,865 INFO L276 IsEmpty]: Start isEmpty. Operand 57553 states and 213382 transitions. [2021-08-06 14:13:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:41,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:41,326 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:41,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 14:13:41,549 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,SelfDestructingSolverStorable109 [2021-08-06 14:13:41,549 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1628124328, now seen corresponding path program 101 times [2021-08-06 14:13:41,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:41,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681417883] [2021-08-06 14:13:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:41,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:41,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:41,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681417883] [2021-08-06 14:13:41,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681417883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:41,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377439666] [2021-08-06 14:13:41,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:13:41,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:41,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:41,598 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:41,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 14:13:43,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:13:43,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:13:44,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377439666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:44,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:44,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 14:13:44,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524290251] [2021-08-06 14:13:44,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:13:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:13:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:13:44,122 INFO L87 Difference]: Start difference. First operand 57553 states and 213382 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-08-06 14:13:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:44,602 INFO L93 Difference]: Finished difference Result 66994 states and 241746 transitions. [2021-08-06 14:13:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) Word has length 29 [2021-08-06 14:13:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:44,871 INFO L225 Difference]: With dead ends: 66994 [2021-08-06 14:13:44,871 INFO L226 Difference]: Without dead ends: 66969 [2021-08-06 14:13:44,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:13:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66969 states. [2021-08-06 14:13:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66969 to 57039. [2021-08-06 14:13:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57039 states, 57038 states have (on average 3.695501244784179) internal successors, (210784), 57038 states have internal predecessors, (210784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57039 states to 57039 states and 210784 transitions. [2021-08-06 14:13:46,823 INFO L78 Accepts]: Start accepts. Automaton has 57039 states and 210784 transitions. Word has length 29 [2021-08-06 14:13:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:46,823 INFO L470 AbstractCegarLoop]: Abstraction has 57039 states and 210784 transitions. [2021-08-06 14:13:46,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-08-06 14:13:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 57039 states and 210784 transitions. [2021-08-06 14:13:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:46,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:46,941 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:46,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 14:13:47,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:47,141 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:47,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:47,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2017931548, now seen corresponding path program 102 times [2021-08-06 14:13:47,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:47,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091870292] [2021-08-06 14:13:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:47,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:47,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:47,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091870292] [2021-08-06 14:13:47,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091870292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:47,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418184968] [2021-08-06 14:13:47,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:13:47,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:47,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:47,182 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:47,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 14:13:49,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:13:49,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:13:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:49,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418184968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:49,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:49,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:13:49,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073151875] [2021-08-06 14:13:49,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:13:49,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:13:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:13:49,774 INFO L87 Difference]: Start difference. First operand 57039 states and 210784 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:50,475 INFO L93 Difference]: Finished difference Result 76951 states and 279561 transitions. [2021-08-06 14:13:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:13:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:50,803 INFO L225 Difference]: With dead ends: 76951 [2021-08-06 14:13:50,803 INFO L226 Difference]: Without dead ends: 76817 [2021-08-06 14:13:50,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:13:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76817 states. [2021-08-06 14:13:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76817 to 68183. [2021-08-06 14:13:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68183 states, 68182 states have (on average 3.72793405884251) internal successors, (254178), 68182 states have internal predecessors, (254178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68183 states to 68183 states and 254178 transitions. [2021-08-06 14:13:53,108 INFO L78 Accepts]: Start accepts. Automaton has 68183 states and 254178 transitions. Word has length 29 [2021-08-06 14:13:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:53,108 INFO L470 AbstractCegarLoop]: Abstraction has 68183 states and 254178 transitions. [2021-08-06 14:13:53,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 68183 states and 254178 transitions. [2021-08-06 14:13:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:53,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:53,261 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:53,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 14:13:53,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:53,461 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash 878375068, now seen corresponding path program 103 times [2021-08-06 14:13:53,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:53,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965665664] [2021-08-06 14:13:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:53,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:53,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:53,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965665664] [2021-08-06 14:13:53,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965665664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:53,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756625609] [2021-08-06 14:13:53,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:13:53,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:53,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:53,501 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:53,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 14:13:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:56,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:13:56,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:13:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:13:56,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756625609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:56,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:13:56,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:13:56,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728845831] [2021-08-06 14:13:56,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:13:56,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:13:56,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:13:56,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:13:56,142 INFO L87 Difference]: Start difference. First operand 68183 states and 254178 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:13:56,777 INFO L93 Difference]: Finished difference Result 78067 states and 283501 transitions. [2021-08-06 14:13:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:13:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:13:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:13:57,124 INFO L225 Difference]: With dead ends: 78067 [2021-08-06 14:13:57,125 INFO L226 Difference]: Without dead ends: 78033 [2021-08-06 14:13:57,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:13:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78033 states. [2021-08-06 14:13:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78033 to 68178. [2021-08-06 14:13:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68178 states, 68177 states have (on average 3.723601801193951) internal successors, (253864), 68177 states have internal predecessors, (253864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68178 states to 68178 states and 253864 transitions. [2021-08-06 14:13:59,420 INFO L78 Accepts]: Start accepts. Automaton has 68178 states and 253864 transitions. Word has length 29 [2021-08-06 14:13:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:13:59,420 INFO L470 AbstractCegarLoop]: Abstraction has 68178 states and 253864 transitions. [2021-08-06 14:13:59,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:13:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 68178 states and 253864 transitions. [2021-08-06 14:13:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:13:59,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:13:59,576 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:13:59,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 14:13:59,776 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,SelfDestructingSolverStorable112 [2021-08-06 14:13:59,777 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:13:59,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:13:59,777 INFO L82 PathProgramCache]: Analyzing trace with hash -686242664, now seen corresponding path program 104 times [2021-08-06 14:13:59,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:13:59,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410552744] [2021-08-06 14:13:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:13:59,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:13:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:13:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:13:59,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:13:59,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410552744] [2021-08-06 14:13:59,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410552744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:13:59,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463920902] [2021-08-06 14:13:59,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:13:59,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:13:59,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:13:59,823 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:13:59,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 14:14:02,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:14:02,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:02,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463920902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:02,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:02,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:14:02,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156552464] [2021-08-06 14:14:02,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:14:02,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:14:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:14:02,484 INFO L87 Difference]: Start difference. First operand 68178 states and 253864 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:03,178 INFO L93 Difference]: Finished difference Result 75727 states and 275560 transitions. [2021-08-06 14:14:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:14:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:14:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:03,492 INFO L225 Difference]: With dead ends: 75727 [2021-08-06 14:14:03,492 INFO L226 Difference]: Without dead ends: 75573 [2021-08-06 14:14:03,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75573 states. [2021-08-06 14:14:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75573 to 68954. [2021-08-06 14:14:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68954 states, 68953 states have (on average 3.714762229344626) internal successors, (256144), 68953 states have internal predecessors, (256144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68954 states to 68954 states and 256144 transitions. [2021-08-06 14:14:05,708 INFO L78 Accepts]: Start accepts. Automaton has 68954 states and 256144 transitions. Word has length 29 [2021-08-06 14:14:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:05,708 INFO L470 AbstractCegarLoop]: Abstraction has 68954 states and 256144 transitions. [2021-08-06 14:14:05,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 68954 states and 256144 transitions. [2021-08-06 14:14:05,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:14:05,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:05,879 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:05,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 14:14:06,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 14:14:06,080 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:14:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1336263132, now seen corresponding path program 105 times [2021-08-06 14:14:06,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:06,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882159572] [2021-08-06 14:14:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:06,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:06,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:06,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882159572] [2021-08-06 14:14:06,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882159572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:06,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214520942] [2021-08-06 14:14:06,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:14:06,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:06,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:06,123 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:06,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 14:14:08,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:14:08,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:14:08,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214520942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:08,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:08,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 14:14:08,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539480816] [2021-08-06 14:14:08,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:14:08,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:14:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:14:08,784 INFO L87 Difference]: Start difference. First operand 68954 states and 256144 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:10,204 INFO L93 Difference]: Finished difference Result 115154 states and 413247 transitions. [2021-08-06 14:14:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 14:14:10,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:14:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:11,009 INFO L225 Difference]: With dead ends: 115154 [2021-08-06 14:14:11,009 INFO L226 Difference]: Without dead ends: 113602 [2021-08-06 14:14:11,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 14:14:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113602 states. [2021-08-06 14:14:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113602 to 77605. [2021-08-06 14:14:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77605 states, 77604 states have (on average 3.7230297407350137) internal successors, (288922), 77604 states have internal predecessors, (288922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77605 states to 77605 states and 288922 transitions. [2021-08-06 14:14:13,798 INFO L78 Accepts]: Start accepts. Automaton has 77605 states and 288922 transitions. Word has length 29 [2021-08-06 14:14:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:13,798 INFO L470 AbstractCegarLoop]: Abstraction has 77605 states and 288922 transitions. [2021-08-06 14:14:13,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 77605 states and 288922 transitions. [2021-08-06 14:14:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:14:13,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:13,953 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:13,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 14:14:14,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 14:14:14,154 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:14:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1181022552, now seen corresponding path program 106 times [2021-08-06 14:14:14,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:14,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113768495] [2021-08-06 14:14:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:14,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:14,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:14,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113768495] [2021-08-06 14:14:14,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113768495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:14,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083079625] [2021-08-06 14:14:14,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:14:14,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:14,609 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:14,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 14:14:16,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:14:16,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:16,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:17,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083079625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:17,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:17,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 14:14:17,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468560999] [2021-08-06 14:14:17,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:14:17,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:14:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:14:17,051 INFO L87 Difference]: Start difference. First operand 77605 states and 288922 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:17,658 INFO L93 Difference]: Finished difference Result 83731 states and 306464 transitions. [2021-08-06 14:14:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:14:17,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:14:17,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:18,216 INFO L225 Difference]: With dead ends: 83731 [2021-08-06 14:14:18,216 INFO L226 Difference]: Without dead ends: 83126 [2021-08-06 14:14:18,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:14:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83126 states. [2021-08-06 14:14:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83126 to 77576. [2021-08-06 14:14:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77576 states, 77575 states have (on average 3.7185304543989686) internal successors, (288465), 77575 states have internal predecessors, (288465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77576 states to 77576 states and 288465 transitions. [2021-08-06 14:14:20,429 INFO L78 Accepts]: Start accepts. Automaton has 77576 states and 288465 transitions. Word has length 29 [2021-08-06 14:14:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:20,429 INFO L470 AbstractCegarLoop]: Abstraction has 77576 states and 288465 transitions. [2021-08-06 14:14:20,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 77576 states and 288465 transitions. [2021-08-06 14:14:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:14:20,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:20,599 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:20,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:20,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:20,799 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:14:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash 924151040, now seen corresponding path program 107 times [2021-08-06 14:14:20,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:20,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055671070] [2021-08-06 14:14:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:20,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:20,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:20,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055671070] [2021-08-06 14:14:20,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055671070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:20,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708706657] [2021-08-06 14:14:20,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:14:20,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:20,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:20,845 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:20,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 14:14:23,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:14:23,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:23,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:14:23,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708706657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:23,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:23,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-06 14:14:23,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514806869] [2021-08-06 14:14:23,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:14:23,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:14:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:14:23,569 INFO L87 Difference]: Start difference. First operand 77576 states and 288465 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:25,160 INFO L93 Difference]: Finished difference Result 101154 states and 359892 transitions. [2021-08-06 14:14:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 14:14:25,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:14:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:26,159 INFO L225 Difference]: With dead ends: 101154 [2021-08-06 14:14:26,159 INFO L226 Difference]: Without dead ends: 100931 [2021-08-06 14:14:26,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 663.5ms TimeCoverageRelationStatistics Valid=1196, Invalid=4504, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 14:14:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100931 states. [2021-08-06 14:14:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100931 to 77641. [2021-08-06 14:14:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77641 states, 77640 states have (on average 3.717697063369397) internal successors, (288642), 77640 states have internal predecessors, (288642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77641 states to 77641 states and 288642 transitions. [2021-08-06 14:14:29,104 INFO L78 Accepts]: Start accepts. Automaton has 77641 states and 288642 transitions. Word has length 29 [2021-08-06 14:14:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:29,105 INFO L470 AbstractCegarLoop]: Abstraction has 77641 states and 288642 transitions. [2021-08-06 14:14:29,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 77641 states and 288642 transitions. [2021-08-06 14:14:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:14:29,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:29,278 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:29,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 14:14:29,478 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,SelfDestructingSolverStorable116 [2021-08-06 14:14:29,479 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:14:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1604584940, now seen corresponding path program 108 times [2021-08-06 14:14:29,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:29,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057945582] [2021-08-06 14:14:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:29,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:14:29,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:29,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057945582] [2021-08-06 14:14:29,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057945582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:29,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160861493] [2021-08-06 14:14:29,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:14:29,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:29,520 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:29,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 14:14:32,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:14:32,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:32,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:32,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:32,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160861493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:32,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:32,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 14:14:32,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220589538] [2021-08-06 14:14:32,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:14:32,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:32,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:14:32,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:14:32,398 INFO L87 Difference]: Start difference. First operand 77641 states and 288642 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:34,154 INFO L93 Difference]: Finished difference Result 104096 states and 367639 transitions. [2021-08-06 14:14:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 14:14:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:14:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:34,659 INFO L225 Difference]: With dead ends: 104096 [2021-08-06 14:14:34,659 INFO L226 Difference]: Without dead ends: 103921 [2021-08-06 14:14:34,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2385 ImplicationChecksByTransitivity, 651.4ms TimeCoverageRelationStatistics Valid=1183, Invalid=4979, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 14:14:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103921 states. [2021-08-06 14:14:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103921 to 77280. [2021-08-06 14:14:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77280 states, 77279 states have (on average 3.703218209345359) internal successors, (286181), 77279 states have internal predecessors, (286181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77280 states to 77280 states and 286181 transitions. [2021-08-06 14:14:37,230 INFO L78 Accepts]: Start accepts. Automaton has 77280 states and 286181 transitions. Word has length 29 [2021-08-06 14:14:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:37,231 INFO L470 AbstractCegarLoop]: Abstraction has 77280 states and 286181 transitions. [2021-08-06 14:14:37,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 77280 states and 286181 transitions. [2021-08-06 14:14:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:14:37,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:37,829 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:37,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:38,030 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,SelfDestructingSolverStorable117 [2021-08-06 14:14:38,030 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:14:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:38,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2014052224, now seen corresponding path program 109 times [2021-08-06 14:14:38,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:38,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135228693] [2021-08-06 14:14:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:38,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:38,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:38,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135228693] [2021-08-06 14:14:38,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135228693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:38,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639083401] [2021-08-06 14:14:38,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:14:38,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:38,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:38,072 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:38,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 14:14:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:40,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:14:40,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639083401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:40,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:40,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:14:40,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239442992] [2021-08-06 14:14:40,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:14:40,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:40,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:14:40,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:14:40,683 INFO L87 Difference]: Start difference. First operand 77280 states and 286181 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:41,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:41,465 INFO L93 Difference]: Finished difference Result 91291 states and 334519 transitions. [2021-08-06 14:14:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:14:41,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:14:41,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:41,924 INFO L225 Difference]: With dead ends: 91291 [2021-08-06 14:14:41,924 INFO L226 Difference]: Without dead ends: 91271 [2021-08-06 14:14:41,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:14:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91271 states. [2021-08-06 14:14:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91271 to 85513. [2021-08-06 14:14:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85513 states, 85512 states have (on average 3.716285433623351) internal successors, (317787), 85512 states have internal predecessors, (317787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85513 states to 85513 states and 317787 transitions. [2021-08-06 14:14:44,640 INFO L78 Accepts]: Start accepts. Automaton has 85513 states and 317787 transitions. Word has length 29 [2021-08-06 14:14:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:44,641 INFO L470 AbstractCegarLoop]: Abstraction has 85513 states and 317787 transitions. [2021-08-06 14:14:44,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 85513 states and 317787 transitions. [2021-08-06 14:14:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:14:45,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:45,230 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:45,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 14:14:45,452 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,SelfDestructingSolverStorable118 [2021-08-06 14:14:45,453 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:14:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:45,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1987290884, now seen corresponding path program 110 times [2021-08-06 14:14:45,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:45,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7174032] [2021-08-06 14:14:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:45,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:14:45,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:45,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7174032] [2021-08-06 14:14:45,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7174032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:45,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169615749] [2021-08-06 14:14:45,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:14:45,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:45,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:45,501 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:45,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 14:14:47,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:14:47,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:47,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:14:48,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169615749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:48,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:48,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 14:14:48,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632731393] [2021-08-06 14:14:48,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:14:48,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:14:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:14:48,077 INFO L87 Difference]: Start difference. First operand 85513 states and 317787 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:48,698 INFO L93 Difference]: Finished difference Result 96326 states and 351609 transitions. [2021-08-06 14:14:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:14:48,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:14:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:49,344 INFO L225 Difference]: With dead ends: 96326 [2021-08-06 14:14:49,344 INFO L226 Difference]: Without dead ends: 96316 [2021-08-06 14:14:49,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:14:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96316 states. [2021-08-06 14:14:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96316 to 85749. [2021-08-06 14:14:51,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85749 states, 85748 states have (on average 3.7148854783785046) internal successors, (318544), 85748 states have internal predecessors, (318544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85749 states to 85749 states and 318544 transitions. [2021-08-06 14:14:52,465 INFO L78 Accepts]: Start accepts. Automaton has 85749 states and 318544 transitions. Word has length 29 [2021-08-06 14:14:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:14:52,465 INFO L470 AbstractCegarLoop]: Abstraction has 85749 states and 318544 transitions. [2021-08-06 14:14:52,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 85749 states and 318544 transitions. [2021-08-06 14:14:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:14:52,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:14:52,688 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:14:52,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 14:14:52,888 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,SelfDestructingSolverStorable119 [2021-08-06 14:14:52,888 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:14:52,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:14:52,889 INFO L82 PathProgramCache]: Analyzing trace with hash -285452240, now seen corresponding path program 111 times [2021-08-06 14:14:52,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:14:52,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962321423] [2021-08-06 14:14:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:14:52,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:14:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:14:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:14:52,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:14:52,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962321423] [2021-08-06 14:14:52,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962321423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:52,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028627296] [2021-08-06 14:14:52,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:14:52,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:14:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:14:52,931 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:14:52,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 14:14:55,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:14:55,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:14:55,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:14:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:14:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:14:55,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028627296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:14:55,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:14:55,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-06 14:14:55,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832154870] [2021-08-06 14:14:55,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:14:55,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:14:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:14:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:14:55,660 INFO L87 Difference]: Start difference. First operand 85749 states and 318544 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:14:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:14:57,490 INFO L93 Difference]: Finished difference Result 131204 states and 462239 transitions. [2021-08-06 14:14:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 14:14:57,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:14:57,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:14:58,514 INFO L225 Difference]: With dead ends: 131204 [2021-08-06 14:14:58,514 INFO L226 Difference]: Without dead ends: 130959 [2021-08-06 14:14:58,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=1029, Invalid=3663, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 14:14:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130959 states. [2021-08-06 14:15:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130959 to 92661. [2021-08-06 14:15:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92661 states, 92660 states have (on average 3.7113317504856465) internal successors, (343892), 92660 states have internal predecessors, (343892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92661 states to 92661 states and 343892 transitions. [2021-08-06 14:15:02,249 INFO L78 Accepts]: Start accepts. Automaton has 92661 states and 343892 transitions. Word has length 29 [2021-08-06 14:15:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:02,249 INFO L470 AbstractCegarLoop]: Abstraction has 92661 states and 343892 transitions. [2021-08-06 14:15:02,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 92661 states and 343892 transitions. [2021-08-06 14:15:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:15:02,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:02,446 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:02,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:02,648 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:15:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:02,648 INFO L82 PathProgramCache]: Analyzing trace with hash -915507288, now seen corresponding path program 112 times [2021-08-06 14:15:02,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:02,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125543044] [2021-08-06 14:15:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:02,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:02,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:02,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125543044] [2021-08-06 14:15:02,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125543044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:02,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542325046] [2021-08-06 14:15:02,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:15:02,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:02,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:02,691 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:02,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 14:15:05,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:15:05,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:05,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:15:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:05,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542325046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:05,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:05,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:15:05,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072760167] [2021-08-06 14:15:05,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:15:05,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:05,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:15:05,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:15:05,558 INFO L87 Difference]: Start difference. First operand 92661 states and 343892 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:06,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:06,286 INFO L93 Difference]: Finished difference Result 106957 states and 389995 transitions. [2021-08-06 14:15:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:15:06,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:15:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:07,054 INFO L225 Difference]: With dead ends: 106957 [2021-08-06 14:15:07,055 INFO L226 Difference]: Without dead ends: 106921 [2021-08-06 14:15:07,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106921 states. [2021-08-06 14:15:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106921 to 94201. [2021-08-06 14:15:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94201 states, 94200 states have (on average 3.706316348195329) internal successors, (349135), 94200 states have internal predecessors, (349135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94201 states to 94201 states and 349135 transitions. [2021-08-06 14:15:09,853 INFO L78 Accepts]: Start accepts. Automaton has 94201 states and 349135 transitions. Word has length 29 [2021-08-06 14:15:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:09,853 INFO L470 AbstractCegarLoop]: Abstraction has 94201 states and 349135 transitions. [2021-08-06 14:15:09,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 94201 states and 349135 transitions. [2021-08-06 14:15:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 14:15:10,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:10,676 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:10,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:10,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:10,905 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:15:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1194204820, now seen corresponding path program 113 times [2021-08-06 14:15:10,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:10,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972925055] [2021-08-06 14:15:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:10,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:10,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:10,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972925055] [2021-08-06 14:15:10,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972925055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:10,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042993814] [2021-08-06 14:15:10,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:15:10,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:10,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:10,964 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:10,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 14:15:13,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:15:13,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:13,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:15:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:13,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042993814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:13,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:13,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 14:15:13,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707821274] [2021-08-06 14:15:13,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:15:13,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:15:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:15:13,592 INFO L87 Difference]: Start difference. First operand 94201 states and 349135 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:14,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:14,486 INFO L93 Difference]: Finished difference Result 103981 states and 378568 transitions. [2021-08-06 14:15:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:15:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 14:15:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:14,999 INFO L225 Difference]: With dead ends: 103981 [2021-08-06 14:15:14,999 INFO L226 Difference]: Without dead ends: 103918 [2021-08-06 14:15:14,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:15:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103918 states. [2021-08-06 14:15:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103918 to 92683. [2021-08-06 14:15:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92683 states, 92682 states have (on average 3.6944606288168145) internal successors, (342410), 92682 states have internal predecessors, (342410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92683 states to 92683 states and 342410 transitions. [2021-08-06 14:15:17,721 INFO L78 Accepts]: Start accepts. Automaton has 92683 states and 342410 transitions. Word has length 29 [2021-08-06 14:15:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:17,721 INFO L470 AbstractCegarLoop]: Abstraction has 92683 states and 342410 transitions. [2021-08-06 14:15:17,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 92683 states and 342410 transitions. [2021-08-06 14:15:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:15:18,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:18,389 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:18,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:18,589 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,SelfDestructingSolverStorable122 [2021-08-06 14:15:18,590 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:15:18,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash 399155782, now seen corresponding path program 114 times [2021-08-06 14:15:18,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:18,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910718439] [2021-08-06 14:15:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:18,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:15:18,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:18,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910718439] [2021-08-06 14:15:18,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910718439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:18,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570409157] [2021-08-06 14:15:18,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:15:18,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:18,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:18,636 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:18,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 14:15:21,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:15:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:15:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:15:21,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570409157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:21,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:21,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-06 14:15:21,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949747930] [2021-08-06 14:15:21,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:15:21,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:15:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:15:21,315 INFO L87 Difference]: Start difference. First operand 92683 states and 342410 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:23,138 INFO L93 Difference]: Finished difference Result 169133 states and 603235 transitions. [2021-08-06 14:15:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 14:15:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:15:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:23,994 INFO L225 Difference]: With dead ends: 169133 [2021-08-06 14:15:23,994 INFO L226 Difference]: Without dead ends: 169001 [2021-08-06 14:15:23,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=345, Invalid=915, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:15:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169001 states. [2021-08-06 14:15:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169001 to 128461. [2021-08-06 14:15:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128461 states, 128460 states have (on average 3.7285536353728785) internal successors, (478970), 128460 states have internal predecessors, (478970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128461 states to 128461 states and 478970 transitions. [2021-08-06 14:15:29,818 INFO L78 Accepts]: Start accepts. Automaton has 128461 states and 478970 transitions. Word has length 31 [2021-08-06 14:15:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:29,818 INFO L470 AbstractCegarLoop]: Abstraction has 128461 states and 478970 transitions. [2021-08-06 14:15:29,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 128461 states and 478970 transitions. [2021-08-06 14:15:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:15:30,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:30,160 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:30,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 14:15:30,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 14:15:30,360 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:15:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1199315074, now seen corresponding path program 115 times [2021-08-06 14:15:30,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:30,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336062723] [2021-08-06 14:15:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:30,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:30,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:30,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336062723] [2021-08-06 14:15:30,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336062723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:30,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858877447] [2021-08-06 14:15:30,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:15:30,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:30,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:30,409 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:30,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 14:15:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:15:33,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:33,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858877447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:33,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:33,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 14:15:33,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419475742] [2021-08-06 14:15:33,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:15:33,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:15:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:15:33,173 INFO L87 Difference]: Start difference. First operand 128461 states and 478970 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:35,327 INFO L93 Difference]: Finished difference Result 159787 states and 568263 transitions. [2021-08-06 14:15:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 14:15:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:15:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:36,552 INFO L225 Difference]: With dead ends: 159787 [2021-08-06 14:15:36,552 INFO L226 Difference]: Without dead ends: 158425 [2021-08-06 14:15:36,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=919, Invalid=3503, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 14:15:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158425 states. [2021-08-06 14:15:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158425 to 114072. [2021-08-06 14:15:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114072 states, 114071 states have (on average 3.7124071849988165) internal successors, (423478), 114071 states have internal predecessors, (423478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114072 states to 114072 states and 423478 transitions. [2021-08-06 14:15:41,061 INFO L78 Accepts]: Start accepts. Automaton has 114072 states and 423478 transitions. Word has length 31 [2021-08-06 14:15:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:41,061 INFO L470 AbstractCegarLoop]: Abstraction has 114072 states and 423478 transitions. [2021-08-06 14:15:41,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 114072 states and 423478 transitions. [2021-08-06 14:15:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:15:41,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:41,826 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:41,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:42,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 14:15:42,027 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:15:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2054650742, now seen corresponding path program 116 times [2021-08-06 14:15:42,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:42,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482979691] [2021-08-06 14:15:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:42,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:15:42,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:42,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482979691] [2021-08-06 14:15:42,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482979691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:42,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973640477] [2021-08-06 14:15:42,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:15:42,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:42,080 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:42,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 14:15:44,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:15:44,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:44,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:15:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:15:44,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973640477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:44,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:44,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-06 14:15:44,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641628699] [2021-08-06 14:15:44,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:15:44,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:44,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:15:44,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:15:44,771 INFO L87 Difference]: Start difference. First operand 114072 states and 423478 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:47,048 INFO L93 Difference]: Finished difference Result 140558 states and 498427 transitions. [2021-08-06 14:15:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-06 14:15:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:15:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:47,712 INFO L225 Difference]: With dead ends: 140558 [2021-08-06 14:15:47,712 INFO L226 Difference]: Without dead ends: 138793 [2021-08-06 14:15:47,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=1399, Invalid=5741, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 14:15:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138793 states. [2021-08-06 14:15:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138793 to 113753. [2021-08-06 14:15:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113753 states, 113752 states have (on average 3.7105721218088474) internal successors, (422085), 113752 states have internal predecessors, (422085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113753 states to 113753 states and 422085 transitions. [2021-08-06 14:15:52,308 INFO L78 Accepts]: Start accepts. Automaton has 113753 states and 422085 transitions. Word has length 31 [2021-08-06 14:15:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:15:52,309 INFO L470 AbstractCegarLoop]: Abstraction has 113753 states and 422085 transitions. [2021-08-06 14:15:52,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 113753 states and 422085 transitions. [2021-08-06 14:15:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:15:52,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:15:52,588 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:15:52,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 14:15:52,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 14:15:52,789 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:15:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:15:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -733260978, now seen corresponding path program 117 times [2021-08-06 14:15:52,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:15:52,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502726296] [2021-08-06 14:15:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:15:52,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:15:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:15:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:15:52,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:15:52,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502726296] [2021-08-06 14:15:52,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502726296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:52,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154964399] [2021-08-06 14:15:52,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:15:52,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:15:52,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:15:52,833 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:15:52,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 14:15:55,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:15:55,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:15:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:15:55,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:15:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:15:55,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154964399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:15:55,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:15:55,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 14:15:55,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308090232] [2021-08-06 14:15:55,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:15:55,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:15:55,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:15:55,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:15:55,840 INFO L87 Difference]: Start difference. First operand 113753 states and 422085 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:15:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:15:57,817 INFO L93 Difference]: Finished difference Result 136845 states and 491457 transitions. [2021-08-06 14:15:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 14:15:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:15:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:15:58,493 INFO L225 Difference]: With dead ends: 136845 [2021-08-06 14:15:58,494 INFO L226 Difference]: Without dead ends: 136081 [2021-08-06 14:15:58,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=889, Invalid=3143, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 14:15:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136081 states. [2021-08-06 14:16:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136081 to 113578. [2021-08-06 14:16:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113578 states, 113577 states have (on average 3.696435017653222) internal successors, (419830), 113577 states have internal predecessors, (419830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113578 states to 113578 states and 419830 transitions. [2021-08-06 14:16:02,388 INFO L78 Accepts]: Start accepts. Automaton has 113578 states and 419830 transitions. Word has length 31 [2021-08-06 14:16:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:02,389 INFO L470 AbstractCegarLoop]: Abstraction has 113578 states and 419830 transitions. [2021-08-06 14:16:02,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 113578 states and 419830 transitions. [2021-08-06 14:16:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:16:03,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:03,065 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:03,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 14:16:03,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 14:16:03,293 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:16:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1144871670, now seen corresponding path program 118 times [2021-08-06 14:16:03,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:03,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522016761] [2021-08-06 14:16:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:03,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:03,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:03,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522016761] [2021-08-06 14:16:03,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522016761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:03,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818426131] [2021-08-06 14:16:03,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:16:03,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:03,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:03,454 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:03,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 14:16:05,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:16:05,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:06,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818426131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:06,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:06,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 14:16:06,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458363431] [2021-08-06 14:16:06,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:16:06,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:16:06,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:16:06,505 INFO L87 Difference]: Start difference. First operand 113578 states and 419830 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:07,529 INFO L93 Difference]: Finished difference Result 114891 states and 423678 transitions. [2021-08-06 14:16:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:16:07,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:16:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:08,391 INFO L225 Difference]: With dead ends: 114891 [2021-08-06 14:16:08,391 INFO L226 Difference]: Without dead ends: 114861 [2021-08-06 14:16:08,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:16:08,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114861 states. [2021-08-06 14:16:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114861 to 113956. [2021-08-06 14:16:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113956 states, 113955 states have (on average 3.6960028081260146) internal successors, (421178), 113955 states have internal predecessors, (421178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113956 states to 113956 states and 421178 transitions. [2021-08-06 14:16:12,246 INFO L78 Accepts]: Start accepts. Automaton has 113956 states and 421178 transitions. Word has length 33 [2021-08-06 14:16:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:12,246 INFO L470 AbstractCegarLoop]: Abstraction has 113956 states and 421178 transitions. [2021-08-06 14:16:12,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 113956 states and 421178 transitions. [2021-08-06 14:16:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:16:13,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:13,044 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:13,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 14:16:13,249 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,SelfDestructingSolverStorable127 [2021-08-06 14:16:13,250 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:16:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:13,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1082616350, now seen corresponding path program 119 times [2021-08-06 14:16:13,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:13,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711950696] [2021-08-06 14:16:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:13,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:13,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:13,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711950696] [2021-08-06 14:16:13,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711950696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:13,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097774407] [2021-08-06 14:16:13,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:16:13,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:13,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:13,400 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:13,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 14:16:16,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:16:16,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:16,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097774407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:16,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:16,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 14:16:16,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614003300] [2021-08-06 14:16:16,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:16:16,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:16:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:16:16,590 INFO L87 Difference]: Start difference. First operand 113956 states and 421178 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:17,640 INFO L93 Difference]: Finished difference Result 115496 states and 425878 transitions. [2021-08-06 14:16:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:16:17,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:16:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:18,461 INFO L225 Difference]: With dead ends: 115496 [2021-08-06 14:16:18,461 INFO L226 Difference]: Without dead ends: 115383 [2021-08-06 14:16:18,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:16:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115383 states. [2021-08-06 14:16:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115383 to 114874. [2021-08-06 14:16:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114874 states, 114873 states have (on average 3.692617064062051) internal successors, (424182), 114873 states have internal predecessors, (424182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114874 states to 114874 states and 424182 transitions. [2021-08-06 14:16:22,140 INFO L78 Accepts]: Start accepts. Automaton has 114874 states and 424182 transitions. Word has length 33 [2021-08-06 14:16:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:22,140 INFO L470 AbstractCegarLoop]: Abstraction has 114874 states and 424182 transitions. [2021-08-06 14:16:22,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 114874 states and 424182 transitions. [2021-08-06 14:16:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:16:22,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:22,872 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:22,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 14:16:23,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:23,073 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:16:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1140926870, now seen corresponding path program 120 times [2021-08-06 14:16:23,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:23,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697660937] [2021-08-06 14:16:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:23,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:23,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:23,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697660937] [2021-08-06 14:16:23,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697660937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:23,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013891210] [2021-08-06 14:16:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:16:23,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:23,207 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:23,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 14:16:25,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 14:16:25,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:25,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:25,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:26,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013891210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:26,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:26,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:16:26,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92129268] [2021-08-06 14:16:26,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:16:26,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:16:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:16:26,267 INFO L87 Difference]: Start difference. First operand 114874 states and 424182 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:27,290 INFO L93 Difference]: Finished difference Result 118532 states and 435710 transitions. [2021-08-06 14:16:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:16:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:16:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:28,117 INFO L225 Difference]: With dead ends: 118532 [2021-08-06 14:16:28,117 INFO L226 Difference]: Without dead ends: 118438 [2021-08-06 14:16:28,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:16:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118438 states. [2021-08-06 14:16:30,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118438 to 116750. [2021-08-06 14:16:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116750 states, 116749 states have (on average 3.6898817120489253) internal successors, (430790), 116749 states have internal predecessors, (430790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116750 states to 116750 states and 430790 transitions. [2021-08-06 14:16:32,054 INFO L78 Accepts]: Start accepts. Automaton has 116750 states and 430790 transitions. Word has length 33 [2021-08-06 14:16:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:32,054 INFO L470 AbstractCegarLoop]: Abstraction has 116750 states and 430790 transitions. [2021-08-06 14:16:32,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 116750 states and 430790 transitions. [2021-08-06 14:16:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:16:32,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:32,357 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:32,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 14:16:32,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:32,558 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:16:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:32,558 INFO L82 PathProgramCache]: Analyzing trace with hash 168119778, now seen corresponding path program 121 times [2021-08-06 14:16:32,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:32,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77213485] [2021-08-06 14:16:32,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:32,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:32,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:32,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77213485] [2021-08-06 14:16:32,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77213485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:32,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786590062] [2021-08-06 14:16:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:16:32,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:32,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:32,684 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:32,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 14:16:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:35,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786590062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:35,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:35,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-06 14:16:35,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082687975] [2021-08-06 14:16:35,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:16:35,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:16:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:16:35,985 INFO L87 Difference]: Start difference. First operand 116750 states and 430790 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:37,423 INFO L93 Difference]: Finished difference Result 117442 states and 432714 transitions. [2021-08-06 14:16:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:16:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:16:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:38,031 INFO L225 Difference]: With dead ends: 117442 [2021-08-06 14:16:38,031 INFO L226 Difference]: Without dead ends: 117374 [2021-08-06 14:16:38,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:16:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117374 states. [2021-08-06 14:16:40,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117374 to 117001. [2021-08-06 14:16:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117001 states, 117000 states have (on average 3.688957264957265) internal successors, (431608), 117000 states have internal predecessors, (431608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117001 states to 117001 states and 431608 transitions. [2021-08-06 14:16:41,854 INFO L78 Accepts]: Start accepts. Automaton has 117001 states and 431608 transitions. Word has length 33 [2021-08-06 14:16:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:41,854 INFO L470 AbstractCegarLoop]: Abstraction has 117001 states and 431608 transitions. [2021-08-06 14:16:41,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 117001 states and 431608 transitions. [2021-08-06 14:16:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:16:42,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:42,172 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:42,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 14:16:42,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:42,372 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:16:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1814233434, now seen corresponding path program 122 times [2021-08-06 14:16:42,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:42,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060643982] [2021-08-06 14:16:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:42,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:42,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:42,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060643982] [2021-08-06 14:16:42,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060643982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:42,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825693221] [2021-08-06 14:16:42,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:16:42,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:42,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:42,518 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:42,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 14:16:45,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:16:45,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:45,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:45,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:45,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825693221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:45,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:45,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-06 14:16:45,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861687724] [2021-08-06 14:16:45,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:16:45,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:16:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:16:45,874 INFO L87 Difference]: Start difference. First operand 117001 states and 431608 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:47,121 INFO L93 Difference]: Finished difference Result 117914 states and 434233 transitions. [2021-08-06 14:16:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:16:47,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:16:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:47,728 INFO L225 Difference]: With dead ends: 117914 [2021-08-06 14:16:47,728 INFO L226 Difference]: Without dead ends: 117834 [2021-08-06 14:16:47,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:16:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117834 states. [2021-08-06 14:16:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117834 to 117415. [2021-08-06 14:16:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117415 states, 117414 states have (on average 3.687567070366396) internal successors, (432972), 117414 states have internal predecessors, (432972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117415 states to 117415 states and 432972 transitions. [2021-08-06 14:16:51,325 INFO L78 Accepts]: Start accepts. Automaton has 117415 states and 432972 transitions. Word has length 33 [2021-08-06 14:16:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:16:51,325 INFO L470 AbstractCegarLoop]: Abstraction has 117415 states and 432972 transitions. [2021-08-06 14:16:51,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 117415 states and 432972 transitions. [2021-08-06 14:16:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:16:52,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:16:52,117 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:16:52,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 14:16:52,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:52,321 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:16:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:16:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -194142810, now seen corresponding path program 123 times [2021-08-06 14:16:52,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:16:52,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643960262] [2021-08-06 14:16:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:16:52,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:16:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:16:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:52,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:16:52,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643960262] [2021-08-06 14:16:52,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643960262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:52,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624813237] [2021-08-06 14:16:52,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:16:52,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:16:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:16:52,458 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:16:52,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 14:16:55,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 14:16:55,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:16:55,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:16:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:16:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:16:55,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624813237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:16:55,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:16:55,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:16:55,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154612545] [2021-08-06 14:16:55,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:16:55,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:16:55,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:16:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:16:55,835 INFO L87 Difference]: Start difference. First operand 117415 states and 432972 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:16:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:16:57,117 INFO L93 Difference]: Finished difference Result 119651 states and 439856 transitions. [2021-08-06 14:16:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:16:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:16:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:16:57,714 INFO L225 Difference]: With dead ends: 119651 [2021-08-06 14:16:57,715 INFO L226 Difference]: Without dead ends: 119621 [2021-08-06 14:16:57,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:16:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119621 states. [2021-08-06 14:17:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119621 to 118151. [2021-08-06 14:17:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118151 states, 118150 states have (on average 3.6879983072365636) internal successors, (435737), 118150 states have internal predecessors, (435737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118151 states to 118151 states and 435737 transitions. [2021-08-06 14:17:02,011 INFO L78 Accepts]: Start accepts. Automaton has 118151 states and 435737 transitions. Word has length 33 [2021-08-06 14:17:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:02,011 INFO L470 AbstractCegarLoop]: Abstraction has 118151 states and 435737 transitions. [2021-08-06 14:17:02,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:02,011 INFO L276 IsEmpty]: Start isEmpty. Operand 118151 states and 435737 transitions. [2021-08-06 14:17:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:17:02,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:02,324 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:02,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 14:17:02,525 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,SelfDestructingSolverStorable132 [2021-08-06 14:17:02,525 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:17:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash 406702426, now seen corresponding path program 124 times [2021-08-06 14:17:02,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:02,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958692448] [2021-08-06 14:17:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:02,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:02,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:02,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958692448] [2021-08-06 14:17:02,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958692448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:02,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883394453] [2021-08-06 14:17:02,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:17:02,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:02,706 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:02,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 14:17:05,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:17:05,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:05,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:06,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883394453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:06,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:06,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:17:06,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728314542] [2021-08-06 14:17:06,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:17:06,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:17:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:17:06,280 INFO L87 Difference]: Start difference. First operand 118151 states and 435737 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:07,538 INFO L93 Difference]: Finished difference Result 120543 states and 443213 transitions. [2021-08-06 14:17:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:17:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:17:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:08,094 INFO L225 Difference]: With dead ends: 120543 [2021-08-06 14:17:08,094 INFO L226 Difference]: Without dead ends: 120494 [2021-08-06 14:17:08,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:17:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120494 states. [2021-08-06 14:17:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120494 to 119130. [2021-08-06 14:17:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119130 states, 119129 states have (on average 3.687683099832954) internal successors, (439310), 119129 states have internal predecessors, (439310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119130 states to 119130 states and 439310 transitions. [2021-08-06 14:17:12,020 INFO L78 Accepts]: Start accepts. Automaton has 119130 states and 439310 transitions. Word has length 33 [2021-08-06 14:17:12,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:12,020 INFO L470 AbstractCegarLoop]: Abstraction has 119130 states and 439310 transitions. [2021-08-06 14:17:12,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 119130 states and 439310 transitions. [2021-08-06 14:17:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:17:12,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:12,796 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:12,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 14:17:12,996 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,SelfDestructingSolverStorable133 [2021-08-06 14:17:12,996 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:17:12,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:12,996 INFO L82 PathProgramCache]: Analyzing trace with hash 348391906, now seen corresponding path program 125 times [2021-08-06 14:17:12,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:12,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565353638] [2021-08-06 14:17:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:12,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:13,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:13,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565353638] [2021-08-06 14:17:13,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565353638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:13,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234528911] [2021-08-06 14:17:13,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:17:13,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:13,119 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:13,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 14:17:15,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:17:15,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:16,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234528911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:16,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:16,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-06 14:17:16,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93986646] [2021-08-06 14:17:16,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:17:16,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:16,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:17:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:17:16,703 INFO L87 Difference]: Start difference. First operand 119130 states and 439310 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:17,961 INFO L93 Difference]: Finished difference Result 119973 states and 441713 transitions. [2021-08-06 14:17:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:17:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:17:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:18,574 INFO L225 Difference]: With dead ends: 119973 [2021-08-06 14:17:18,574 INFO L226 Difference]: Without dead ends: 119893 [2021-08-06 14:17:18,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:17:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119893 states. [2021-08-06 14:17:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119893 to 119460. [2021-08-06 14:17:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119460 states, 119459 states have (on average 3.6866372562971397) internal successors, (440402), 119459 states have internal predecessors, (440402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119460 states to 119460 states and 440402 transitions. [2021-08-06 14:17:22,094 INFO L78 Accepts]: Start accepts. Automaton has 119460 states and 440402 transitions. Word has length 33 [2021-08-06 14:17:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:22,094 INFO L470 AbstractCegarLoop]: Abstraction has 119460 states and 440402 transitions. [2021-08-06 14:17:22,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 119460 states and 440402 transitions. [2021-08-06 14:17:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:17:22,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:22,830 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:22,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 14:17:23,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:23,031 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:17:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash 164706334, now seen corresponding path program 126 times [2021-08-06 14:17:23,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:23,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384166934] [2021-08-06 14:17:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:23,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:23,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:23,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384166934] [2021-08-06 14:17:23,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384166934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:23,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500659925] [2021-08-06 14:17:23,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:17:23,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:23,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:23,179 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:23,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 14:17:26,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:17:26,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:26,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:26,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500659925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:26,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:26,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-06 14:17:26,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259457518] [2021-08-06 14:17:26,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:17:26,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:17:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:17:26,696 INFO L87 Difference]: Start difference. First operand 119460 states and 440402 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:27,800 INFO L93 Difference]: Finished difference Result 120591 states and 443723 transitions. [2021-08-06 14:17:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:17:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:17:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:28,350 INFO L225 Difference]: With dead ends: 120591 [2021-08-06 14:17:28,351 INFO L226 Difference]: Without dead ends: 120502 [2021-08-06 14:17:28,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:17:28,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120502 states. [2021-08-06 14:17:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120502 to 120055. [2021-08-06 14:17:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120055 states, 120054 states have (on average 3.6846668998950474) internal successors, (442359), 120054 states have internal predecessors, (442359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120055 states to 120055 states and 442359 transitions. [2021-08-06 14:17:32,274 INFO L78 Accepts]: Start accepts. Automaton has 120055 states and 442359 transitions. Word has length 33 [2021-08-06 14:17:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:32,274 INFO L470 AbstractCegarLoop]: Abstraction has 120055 states and 442359 transitions. [2021-08-06 14:17:32,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 120055 states and 442359 transitions. [2021-08-06 14:17:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:17:32,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:32,580 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:32,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 14:17:32,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 14:17:32,781 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:17:32,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:32,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1817646878, now seen corresponding path program 127 times [2021-08-06 14:17:32,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:32,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884634084] [2021-08-06 14:17:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:32,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:32,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:32,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884634084] [2021-08-06 14:17:32,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884634084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:32,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033437173] [2021-08-06 14:17:32,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:17:32,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:32,903 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:32,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 14:17:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:36,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033437173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:36,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:36,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-06 14:17:36,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624082372] [2021-08-06 14:17:36,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:17:36,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:17:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:17:36,422 INFO L87 Difference]: Start difference. First operand 120055 states and 442359 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:37,518 INFO L93 Difference]: Finished difference Result 120891 states and 444750 transitions. [2021-08-06 14:17:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:17:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:17:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:38,042 INFO L225 Difference]: With dead ends: 120891 [2021-08-06 14:17:38,043 INFO L226 Difference]: Without dead ends: 120780 [2021-08-06 14:17:38,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:17:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120780 states. [2021-08-06 14:17:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120780 to 120345. [2021-08-06 14:17:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120345 states, 120344 states have (on average 3.6841221830751847) internal successors, (443362), 120344 states have internal predecessors, (443362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120345 states to 120345 states and 443362 transitions. [2021-08-06 14:17:41,894 INFO L78 Accepts]: Start accepts. Automaton has 120345 states and 443362 transitions. Word has length 33 [2021-08-06 14:17:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:41,894 INFO L470 AbstractCegarLoop]: Abstraction has 120345 states and 443362 transitions. [2021-08-06 14:17:41,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 120345 states and 443362 transitions. [2021-08-06 14:17:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:17:42,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:42,196 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:42,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:42,396 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,SelfDestructingSolverStorable136 [2021-08-06 14:17:42,397 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:17:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash -197556254, now seen corresponding path program 128 times [2021-08-06 14:17:42,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:42,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319735436] [2021-08-06 14:17:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:42,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:42,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:42,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319735436] [2021-08-06 14:17:42,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319735436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:42,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457191748] [2021-08-06 14:17:42,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:17:42,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:42,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:42,997 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:42,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 14:17:45,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:17:45,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:45,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:45,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457191748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:46,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:46,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:17:46,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409963842] [2021-08-06 14:17:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:17:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:17:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:17:46,333 INFO L87 Difference]: Start difference. First operand 120345 states and 443362 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:47,422 INFO L93 Difference]: Finished difference Result 121494 states and 446698 transitions. [2021-08-06 14:17:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:17:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:17:47,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:48,320 INFO L225 Difference]: With dead ends: 121494 [2021-08-06 14:17:48,320 INFO L226 Difference]: Without dead ends: 121345 [2021-08-06 14:17:48,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:17:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121345 states. [2021-08-06 14:17:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121345 to 120795. [2021-08-06 14:17:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120795 states, 120794 states have (on average 3.683063728330877) internal successors, (444892), 120794 states have internal predecessors, (444892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120795 states to 120795 states and 444892 transitions. [2021-08-06 14:17:51,995 INFO L78 Accepts]: Start accepts. Automaton has 120795 states and 444892 transitions. Word has length 33 [2021-08-06 14:17:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:17:51,995 INFO L470 AbstractCegarLoop]: Abstraction has 120795 states and 444892 transitions. [2021-08-06 14:17:51,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 120795 states and 444892 transitions. [2021-08-06 14:17:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:17:53,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:17:53,119 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:17:53,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 14:17:53,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:53,333 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:17:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:17:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1660573470, now seen corresponding path program 129 times [2021-08-06 14:17:53,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:17:53,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635748490] [2021-08-06 14:17:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:17:53,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:17:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:17:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:53,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:17:53,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635748490] [2021-08-06 14:17:53,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635748490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:53,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167416453] [2021-08-06 14:17:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:17:53,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:17:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:17:53,553 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:17:53,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 14:17:56,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:17:56,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:17:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:17:56,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:17:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:17:57,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167416453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:17:57,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:17:57,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:17:57,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084798313] [2021-08-06 14:17:57,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:17:57,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:17:57,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:17:57,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:17:57,370 INFO L87 Difference]: Start difference. First operand 120795 states and 444892 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:17:58,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:17:58,761 INFO L93 Difference]: Finished difference Result 123862 states and 454373 transitions. [2021-08-06 14:17:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:17:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:17:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:17:59,376 INFO L225 Difference]: With dead ends: 123862 [2021-08-06 14:17:59,376 INFO L226 Difference]: Without dead ends: 123814 [2021-08-06 14:17:59,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:17:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123814 states. [2021-08-06 14:18:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123814 to 122152. [2021-08-06 14:18:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122152 states, 122151 states have (on average 3.681394339792552) internal successors, (449686), 122151 states have internal predecessors, (449686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122152 states to 122152 states and 449686 transitions. [2021-08-06 14:18:03,878 INFO L78 Accepts]: Start accepts. Automaton has 122152 states and 449686 transitions. Word has length 33 [2021-08-06 14:18:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:03,878 INFO L470 AbstractCegarLoop]: Abstraction has 122152 states and 449686 transitions. [2021-08-06 14:18:03,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 122152 states and 449686 transitions. [2021-08-06 14:18:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:18:04,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:04,691 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:04,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-06 14:18:04,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:04,891 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:18:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash -321779742, now seen corresponding path program 130 times [2021-08-06 14:18:04,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:04,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64561069] [2021-08-06 14:18:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:04,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:05,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:05,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64561069] [2021-08-06 14:18:05,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64561069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:05,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545274463] [2021-08-06 14:18:05,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:18:05,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:05,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:05,025 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:05,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 14:18:08,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:18:08,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:08,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:08,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545274463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:08,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:08,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:18:08,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764711082] [2021-08-06 14:18:08,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:18:08,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:08,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:18:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:18:08,602 INFO L87 Difference]: Start difference. First operand 122152 states and 449686 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:09,856 INFO L93 Difference]: Finished difference Result 123287 states and 452998 transitions. [2021-08-06 14:18:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:18:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:18:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:10,494 INFO L225 Difference]: With dead ends: 123287 [2021-08-06 14:18:10,494 INFO L226 Difference]: Without dead ends: 123184 [2021-08-06 14:18:10,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:18:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123184 states. [2021-08-06 14:18:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123184 to 122656. [2021-08-06 14:18:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122656 states, 122655 states have (on average 3.680070115364233) internal successors, (451379), 122655 states have internal predecessors, (451379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122656 states to 122656 states and 451379 transitions. [2021-08-06 14:18:14,687 INFO L78 Accepts]: Start accepts. Automaton has 122656 states and 451379 transitions. Word has length 33 [2021-08-06 14:18:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:14,687 INFO L470 AbstractCegarLoop]: Abstraction has 122656 states and 451379 transitions. [2021-08-06 14:18:14,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 122656 states and 451379 transitions. [2021-08-06 14:18:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:18:14,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:14,997 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:15,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:15,197 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,SelfDestructingSolverStorable139 [2021-08-06 14:18:15,197 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:18:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1298310882, now seen corresponding path program 131 times [2021-08-06 14:18:15,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:15,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943130022] [2021-08-06 14:18:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:15,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:15,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:15,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943130022] [2021-08-06 14:18:15,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943130022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:15,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606074041] [2021-08-06 14:18:15,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:18:15,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:15,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:15,807 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:15,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 14:18:18,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:18:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:18,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:19,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606074041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:19,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:19,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 14:18:19,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220317304] [2021-08-06 14:18:19,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:18:19,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:18:19,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:18:19,245 INFO L87 Difference]: Start difference. First operand 122656 states and 451379 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:20,557 INFO L93 Difference]: Finished difference Result 123867 states and 454886 transitions. [2021-08-06 14:18:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:18:20,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:18:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:21,144 INFO L225 Difference]: With dead ends: 123867 [2021-08-06 14:18:21,144 INFO L226 Difference]: Without dead ends: 123726 [2021-08-06 14:18:21,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:18:21,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123726 states. [2021-08-06 14:18:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123726 to 122172. [2021-08-06 14:18:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122172 states, 122171 states have (on average 3.6810781609383567) internal successors, (449721), 122171 states have internal predecessors, (449721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122172 states to 122172 states and 449721 transitions. [2021-08-06 14:18:25,173 INFO L78 Accepts]: Start accepts. Automaton has 122172 states and 449721 transitions. Word has length 33 [2021-08-06 14:18:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:25,173 INFO L470 AbstractCegarLoop]: Abstraction has 122172 states and 449721 transitions. [2021-08-06 14:18:25,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 122172 states and 449721 transitions. [2021-08-06 14:18:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:18:25,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:25,476 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:25,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-06 14:18:25,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:25,676 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:18:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash -867727902, now seen corresponding path program 132 times [2021-08-06 14:18:25,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:25,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072053800] [2021-08-06 14:18:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:25,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:25,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:25,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072053800] [2021-08-06 14:18:25,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072053800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:25,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077257111] [2021-08-06 14:18:25,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:18:25,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:25,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:25,823 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:25,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 14:18:28,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:18:28,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:28,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:29,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077257111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:29,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:29,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 14:18:29,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371267208] [2021-08-06 14:18:29,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:18:29,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:18:29,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:18:29,546 INFO L87 Difference]: Start difference. First operand 122172 states and 449721 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:30,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:30,695 INFO L93 Difference]: Finished difference Result 123482 states and 453552 transitions. [2021-08-06 14:18:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:18:30,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:18:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:31,587 INFO L225 Difference]: With dead ends: 123482 [2021-08-06 14:18:31,587 INFO L226 Difference]: Without dead ends: 123452 [2021-08-06 14:18:31,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:18:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123452 states. [2021-08-06 14:18:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123452 to 122455. [2021-08-06 14:18:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122455 states, 122454 states have (on average 3.6809740800627173) internal successors, (450750), 122454 states have internal predecessors, (450750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122455 states to 122455 states and 450750 transitions. [2021-08-06 14:18:36,101 INFO L78 Accepts]: Start accepts. Automaton has 122455 states and 450750 transitions. Word has length 33 [2021-08-06 14:18:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:36,101 INFO L470 AbstractCegarLoop]: Abstraction has 122455 states and 450750 transitions. [2021-08-06 14:18:36,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 122455 states and 450750 transitions. [2021-08-06 14:18:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:18:36,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:36,562 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:36,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:36,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:36,789 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:18:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash -601756176, now seen corresponding path program 133 times [2021-08-06 14:18:36,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:36,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313034686] [2021-08-06 14:18:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:36,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:37,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:37,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313034686] [2021-08-06 14:18:37,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313034686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:37,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366987706] [2021-08-06 14:18:37,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:18:37,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:37,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:37,388 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:37,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 14:18:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:40,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:41,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366987706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:41,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:41,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 14:18:41,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906182315] [2021-08-06 14:18:41,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 14:18:41,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 14:18:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:18:41,189 INFO L87 Difference]: Start difference. First operand 122455 states and 450750 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:42,619 INFO L93 Difference]: Finished difference Result 124582 states and 457117 transitions. [2021-08-06 14:18:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:18:42,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:18:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:43,248 INFO L225 Difference]: With dead ends: 124582 [2021-08-06 14:18:43,248 INFO L226 Difference]: Without dead ends: 124526 [2021-08-06 14:18:43,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:18:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124526 states. [2021-08-06 14:18:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124526 to 123367. [2021-08-06 14:18:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123367 states, 123366 states have (on average 3.679441661397792) internal successors, (453918), 123366 states have internal predecessors, (453918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123367 states to 123367 states and 453918 transitions. [2021-08-06 14:18:47,647 INFO L78 Accepts]: Start accepts. Automaton has 123367 states and 453918 transitions. Word has length 33 [2021-08-06 14:18:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:47,648 INFO L470 AbstractCegarLoop]: Abstraction has 123367 states and 453918 transitions. [2021-08-06 14:18:47,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 123367 states and 453918 transitions. [2021-08-06 14:18:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:18:47,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:47,964 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:47,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 14:18:48,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:48,165 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:18:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1578508068, now seen corresponding path program 134 times [2021-08-06 14:18:48,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:48,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472529869] [2021-08-06 14:18:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:48,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:48,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:48,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472529869] [2021-08-06 14:18:48,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472529869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:48,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083458441] [2021-08-06 14:18:48,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:18:48,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:48,291 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:48,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 14:18:51,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:18:51,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:18:51,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:18:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:18:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:18:52,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083458441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:52,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:18:52,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-06 14:18:52,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844114671] [2021-08-06 14:18:52,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:18:52,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:18:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:18:52,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:18:52,189 INFO L87 Difference]: Start difference. First operand 123367 states and 453918 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:18:53,126 INFO L93 Difference]: Finished difference Result 124167 states and 456246 transitions. [2021-08-06 14:18:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:18:53,126 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:18:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:18:53,974 INFO L225 Difference]: With dead ends: 124167 [2021-08-06 14:18:53,974 INFO L226 Difference]: Without dead ends: 124057 [2021-08-06 14:18:53,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:18:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124057 states. [2021-08-06 14:18:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124057 to 123807. [2021-08-06 14:18:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123807 states, 123806 states have (on average 3.6775438993263654) internal successors, (455302), 123806 states have internal predecessors, (455302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123807 states to 123807 states and 455302 transitions. [2021-08-06 14:18:57,430 INFO L78 Accepts]: Start accepts. Automaton has 123807 states and 455302 transitions. Word has length 33 [2021-08-06 14:18:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:18:57,430 INFO L470 AbstractCegarLoop]: Abstraction has 123807 states and 455302 transitions. [2021-08-06 14:18:57,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:18:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 123807 states and 455302 transitions. [2021-08-06 14:18:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:18:58,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:18:58,191 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:18:58,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 14:18:58,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:58,391 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:18:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:18:58,391 INFO L82 PathProgramCache]: Analyzing trace with hash 734106016, now seen corresponding path program 135 times [2021-08-06 14:18:58,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:18:58,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995865897] [2021-08-06 14:18:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:18:58,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:18:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:18:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:18:58,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:18:58,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995865897] [2021-08-06 14:18:58,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995865897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:18:58,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111206147] [2021-08-06 14:18:58,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:18:58,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:18:58,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:18:58,515 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:18:58,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 14:19:01,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:19:01,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:19:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:02,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111206147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:02,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:02,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-06 14:19:02,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808797614] [2021-08-06 14:19:02,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:19:02,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:19:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:02,238 INFO L87 Difference]: Start difference. First operand 123807 states and 455302 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:03,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:03,280 INFO L93 Difference]: Finished difference Result 124533 states and 457363 transitions. [2021-08-06 14:19:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:19:03,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:19:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:03,830 INFO L225 Difference]: With dead ends: 124533 [2021-08-06 14:19:03,830 INFO L226 Difference]: Without dead ends: 124391 [2021-08-06 14:19:03,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124391 states. [2021-08-06 14:19:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124391 to 124155. [2021-08-06 14:19:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124155 states, 124154 states have (on average 3.675838072071782) internal successors, (456370), 124154 states have internal predecessors, (456370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124155 states to 124155 states and 456370 transitions. [2021-08-06 14:19:07,627 INFO L78 Accepts]: Start accepts. Automaton has 124155 states and 456370 transitions. Word has length 33 [2021-08-06 14:19:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:07,627 INFO L470 AbstractCegarLoop]: Abstraction has 124155 states and 456370 transitions. [2021-08-06 14:19:07,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 124155 states and 456370 transitions. [2021-08-06 14:19:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:19:08,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:08,553 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:08,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:08,768 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,SelfDestructingSolverStorable144 [2021-08-06 14:19:08,769 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:19:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:08,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1940770656, now seen corresponding path program 136 times [2021-08-06 14:19:08,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:08,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662420091] [2021-08-06 14:19:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:08,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:19:08,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:08,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662420091] [2021-08-06 14:19:08,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662420091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:08,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160151541] [2021-08-06 14:19:08,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:19:08,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:08,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:08,937 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:08,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 14:19:12,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:19:12,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:19:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:12,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160151541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:12,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:12,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:19:12,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088551340] [2021-08-06 14:19:12,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:19:12,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:19:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:19:12,840 INFO L87 Difference]: Start difference. First operand 124155 states and 456370 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:14,073 INFO L93 Difference]: Finished difference Result 126486 states and 463503 transitions. [2021-08-06 14:19:14,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:19:14,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:19:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:14,637 INFO L225 Difference]: With dead ends: 126486 [2021-08-06 14:19:14,637 INFO L226 Difference]: Without dead ends: 126327 [2021-08-06 14:19:14,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:19:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126327 states. [2021-08-06 14:19:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126327 to 125293. [2021-08-06 14:19:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125293 states, 125292 states have (on average 3.6735226510870604) internal successors, (460263), 125292 states have internal predecessors, (460263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125293 states to 125293 states and 460263 transitions. [2021-08-06 14:19:18,635 INFO L78 Accepts]: Start accepts. Automaton has 125293 states and 460263 transitions. Word has length 33 [2021-08-06 14:19:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:18,636 INFO L470 AbstractCegarLoop]: Abstraction has 125293 states and 460263 transitions. [2021-08-06 14:19:18,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 125293 states and 460263 transitions. [2021-08-06 14:19:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:19:19,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:19,399 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:19,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 14:19:19,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 14:19:19,599 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:19:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:19,599 INFO L82 PathProgramCache]: Analyzing trace with hash -438246880, now seen corresponding path program 137 times [2021-08-06 14:19:19,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:19,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927084516] [2021-08-06 14:19:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:19,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:19,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:19,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927084516] [2021-08-06 14:19:19,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927084516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:19,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90340945] [2021-08-06 14:19:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:19:19,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:19,724 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:19,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 14:19:22,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:19:22,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:22,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:19:22,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:23,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90340945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:23,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:23,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-08-06 14:19:23,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127007697] [2021-08-06 14:19:23,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 14:19:23,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 14:19:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:23,467 INFO L87 Difference]: Start difference. First operand 125293 states and 460263 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:24,728 INFO L93 Difference]: Finished difference Result 126467 states and 463681 transitions. [2021-08-06 14:19:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:19:24,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:19:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:25,376 INFO L225 Difference]: With dead ends: 126467 [2021-08-06 14:19:25,376 INFO L226 Difference]: Without dead ends: 126411 [2021-08-06 14:19:25,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:19:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126411 states. [2021-08-06 14:19:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126411 to 125577. [2021-08-06 14:19:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125577 states, 125576 states have (on average 3.6734009683378988) internal successors, (461291), 125576 states have internal predecessors, (461291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125577 states to 125577 states and 461291 transitions. [2021-08-06 14:19:29,856 INFO L78 Accepts]: Start accepts. Automaton has 125577 states and 461291 transitions. Word has length 33 [2021-08-06 14:19:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:29,856 INFO L470 AbstractCegarLoop]: Abstraction has 125577 states and 461291 transitions. [2021-08-06 14:19:29,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:29,856 INFO L276 IsEmpty]: Start isEmpty. Operand 125577 states and 461291 transitions. [2021-08-06 14:19:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:19:30,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:30,676 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:30,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:30,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 14:19:30,876 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:19:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash -581181848, now seen corresponding path program 138 times [2021-08-06 14:19:30,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:30,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639031179] [2021-08-06 14:19:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:30,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:31,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:31,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639031179] [2021-08-06 14:19:31,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639031179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:31,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920830942] [2021-08-06 14:19:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:19:31,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:31,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:31,015 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:31,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 14:19:34,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:19:34,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:19:34,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:19:34,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:34,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920830942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:34,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:34,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:19:34,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184551659] [2021-08-06 14:19:34,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:19:34,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:19:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:19:34,793 INFO L87 Difference]: Start difference. First operand 125577 states and 461291 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:36,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:36,033 INFO L93 Difference]: Finished difference Result 127961 states and 468825 transitions. [2021-08-06 14:19:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:19:36,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:19:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:36,711 INFO L225 Difference]: With dead ends: 127961 [2021-08-06 14:19:36,711 INFO L226 Difference]: Without dead ends: 127918 [2021-08-06 14:19:36,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:19:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127918 states. [2021-08-06 14:19:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127918 to 126279. [2021-08-06 14:19:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126279 states, 126278 states have (on average 3.6750344478056354) internal successors, (464076), 126278 states have internal predecessors, (464076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126279 states to 126279 states and 464076 transitions. [2021-08-06 14:19:41,563 INFO L78 Accepts]: Start accepts. Automaton has 126279 states and 464076 transitions. Word has length 33 [2021-08-06 14:19:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:41,564 INFO L470 AbstractCegarLoop]: Abstraction has 126279 states and 464076 transitions. [2021-08-06 14:19:41,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 126279 states and 464076 transitions. [2021-08-06 14:19:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:19:41,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:41,882 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:41,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:42,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 14:19:42,083 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:19:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1095257944, now seen corresponding path program 139 times [2021-08-06 14:19:42,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:42,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024574294] [2021-08-06 14:19:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:42,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:42,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:42,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024574294] [2021-08-06 14:19:42,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024574294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:42,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510887929] [2021-08-06 14:19:42,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:19:42,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:42,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:42,221 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:42,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 14:19:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:19:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:19:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:46,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510887929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:46,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:19:46,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-06 14:19:46,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613768752] [2021-08-06 14:19:46,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 14:19:46,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:19:46,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 14:19:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:19:46,158 INFO L87 Difference]: Start difference. First operand 126279 states and 464076 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:19:47,235 INFO L93 Difference]: Finished difference Result 127585 states and 468226 transitions. [2021-08-06 14:19:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:19:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 14:19:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:19:48,152 INFO L225 Difference]: With dead ends: 127585 [2021-08-06 14:19:48,152 INFO L226 Difference]: Without dead ends: 127473 [2021-08-06 14:19:48,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:19:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127473 states. [2021-08-06 14:19:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127473 to 126981. [2021-08-06 14:19:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126981 states, 126980 states have (on average 3.673862025515829) internal successors, (466507), 126980 states have internal predecessors, (466507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126981 states to 126981 states and 466507 transitions. [2021-08-06 14:19:52,373 INFO L78 Accepts]: Start accepts. Automaton has 126981 states and 466507 transitions. Word has length 33 [2021-08-06 14:19:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:19:52,374 INFO L470 AbstractCegarLoop]: Abstraction has 126981 states and 466507 transitions. [2021-08-06 14:19:52,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:19:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 126981 states and 466507 transitions. [2021-08-06 14:19:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 14:19:52,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:19:52,820 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:19:52,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:53,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:53,033 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:19:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:19:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash -792621028, now seen corresponding path program 140 times [2021-08-06 14:19:53,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:19:53,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305828839] [2021-08-06 14:19:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:19:53,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:19:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:19:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:19:53,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:19:53,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305828839] [2021-08-06 14:19:53,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305828839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:19:53,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557394724] [2021-08-06 14:19:53,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:19:53,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:19:53,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:19:53,661 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:19:53,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 14:19:54,019 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:19:54,063 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:19:55,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:55,068 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:19:55,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 14:19:55,268 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,SelfDestructingSolverStorable149 [2021-08-06 14:19:55,269 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while executing Executor. [2021-08-06 14:19:55,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:19:55,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:19:55,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 14:19:55,274 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:19:55,274 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:19:55,276 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:19:55 BasicIcfg [2021-08-06 14:19:55,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:19:55,316 INFO L168 Benchmark]: Toolchain (without parser) took 668607.19 ms. Allocated memory was 204.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 185.2 MB in the beginning and 6.3 GB in the end (delta: -6.1 GB). Peak memory consumption was 4.4 GB. Max. memory is 8.0 GB. [2021-08-06 14:19:55,316 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 204.5 MB. Free memory is still 186.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:19:55,316 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.77 ms. Allocated memory is still 204.5 MB. Free memory was 185.1 MB in the beginning and 183.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:19:55,316 INFO L168 Benchmark]: Boogie Preprocessor took 13.30 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 182.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:19:55,316 INFO L168 Benchmark]: RCFGBuilder took 282.51 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 169.9 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 14:19:55,316 INFO L168 Benchmark]: TraceAbstraction took 668282.20 ms. Allocated memory was 204.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 169.4 MB in the beginning and 6.3 GB in the end (delta: -6.1 GB). Peak memory consumption was 4.4 GB. Max. memory is 8.0 GB. [2021-08-06 14:19:55,317 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 204.5 MB. Free memory is still 186.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.77 ms. Allocated memory is still 204.5 MB. Free memory was 185.1 MB in the beginning and 183.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.30 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 182.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 282.51 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 169.9 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 668282.20 ms. Allocated memory was 204.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 169.4 MB in the beginning and 6.3 GB in the end (delta: -6.1 GB). Peak memory consumption was 4.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 3,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 668162.5ms, OverallIterations: 150, TraceHistogramMax: 3, EmptinessCheckTime: 25369.0ms, AutomataDifference: 121738.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 50.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8884 SDtfs, 20096 SDslu, 74101 SDs, 0 SdLazy, 41426 SolverSat, 3179 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19261.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6090 GetRequests, 3225 SyntacticMatches, 37 SemanticMatches, 2828 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29382 ImplicationChecksByTransitivity, 27737.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=128461occurred in iteration=124, InterpolantAutomatonStates: 2752, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 203524.5ms AutomataMinimizationTime, 149 MinimizatonAttempts, 699770 StatesRemovedByMinimization, 149 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 567.9ms SsaConstructionTime, 1983.6ms SatisfiabilityAnalysisTime, 59540.3ms InterpolantComputationTime, 7940 NumberOfCodeBlocks, 7932 NumberOfCodeBlocksAsserted, 532 NumberOfCheckSat, 7650 ConstructedInterpolants, 0 QuantifiedInterpolants, 85702 SizeOfPredicates, 531 NumberOfNonLiveVariables, 10937 ConjunctsInSsa, 2093 ConjunctsInUnsatCore, 290 InterpolantComputations, 8 PerfectInterpolantSequences, 949/4123 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown !SESSION 2021-08-06 14:08:44.849 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.12 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -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/mult-flipped-dist.wvr.bpl Command-line arguments: -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/mult-flipped-dist.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-08-06 14:19:55.368 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d0653dd1/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d0653dd1/.metadata/.log.