/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/TwoActiveWorkersSirius.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 20:32:10,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:32:10,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:32:10,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 20:32:10,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:32:10,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:32:10,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:32:10,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 20:32:10,262 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:32:10,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:32:10,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:32:10,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:32:10,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:32:10,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:32:10,265 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:32:10,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:32:10,265 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:32:10,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:32:10,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:32:10,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:32:10,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:32:10,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:32:10,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:32:10,267 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:32:10,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:32:10,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:32:10,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:32:10,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:32:10,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:32:10,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:32:10,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:32:10,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:32:10,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:32:10,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:32:10,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:32:10,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:32:10,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:32:10,269 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:32:10,269 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:32:10,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:32:10,270 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:32:10,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:32:10,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:32:10,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:32:10,538 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 20:32:10,540 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 20:32:10,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/TwoActiveWorkersSirius.bpl [2022-03-15 20:32:10,542 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/TwoActiveWorkersSirius.bpl' [2022-03-15 20:32:10,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:32:10,563 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 20:32:10,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:32:10,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:32:10,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:32:10,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,589 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 20:32:10,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:32:10,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:32:10,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:32:10,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:32:10,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:32:10,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:32:10,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:32:10,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:32:10,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/1) ... [2022-03-15 20:32:10,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:32:10,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:10,645 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) [2022-03-15 20:32:10,667 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 [2022-03-15 20:32:10,681 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 20:32:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:32:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:32:10,681 INFO L124 BoogieDeclarations]: Specification and implementation of procedure worker given in one single declaration [2022-03-15 20:32:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2022-03-15 20:32:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2022-03-15 20:32:10,682 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 20:32:10,717 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:32:10,719 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:32:10,806 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:32:10,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:32:10,813 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-15 20:32:10,815 INFO L202 PluginConnector]: Adding new model TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:32:10 BoogieIcfgContainer [2022-03-15 20:32:10,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:32:10,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:32:10,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:32:10,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:32:10,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:32:10" (1/2) ... [2022-03-15 20:32:10,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3960a7e2 and model type TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:32:10, skipping insertion in model container [2022-03-15 20:32:10,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:32:10" (2/2) ... [2022-03-15 20:32:10,831 INFO L111 eAbstractionObserver]: Analyzing ICFG TwoActiveWorkersSirius.bpl [2022-03-15 20:32:10,840 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:32:10,841 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:32:10,841 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:32:10,841 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:32:10,890 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-03-15 20:32:10,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:32:10,950 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 20:32:10,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 20:32:10,960 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:32:10,975 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 14 transitions, 36 flow [2022-03-15 20:32:10,979 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 14 transitions, 36 flow [2022-03-15 20:32:10,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 14 transitions, 36 flow [2022-03-15 20:32:11,001 INFO L129 PetriNetUnfolder]: 1/16 cut-off events. [2022-03-15 20:32:11,001 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-03-15 20:32:11,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 16 events. 1/16 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 1. Up to 3 conditions per place. [2022-03-15 20:32:11,007 INFO L116 LiptonReduction]: Number of co-enabled transitions 50 [2022-03-15 20:32:11,124 INFO L131 LiptonReduction]: Checked pairs total: 89 [2022-03-15 20:32:11,124 INFO L133 LiptonReduction]: Total number of compositions: 3 [2022-03-15 20:32:11,131 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 12 transitions, 32 flow [2022-03-15 20:32:11,142 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 27 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) [2022-03-15 20:32:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 27 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) [2022-03-15 20:32:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-03-15 20:32:11,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:11,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-03-15 20:32:11,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2273854, now seen corresponding path program 1 times [2022-03-15 20:32:11,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:11,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598810861] [2022-03-15 20:32:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:11,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598810861] [2022-03-15 20:32:11,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598810861] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:11,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:11,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 20:32:11,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1556941221] [2022-03-15 20:32:11,317 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:11,319 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:11,327 INFO L252 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2022-03-15 20:32:11,328 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:11,331 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:32:11,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:32:11,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:11,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:32:11,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:11,356 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 27 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) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:11,437 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2022-03-15 20:32:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:32:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-03-15 20:32:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:11,451 INFO L225 Difference]: With dead ends: 36 [2022-03-15 20:32:11,451 INFO L226 Difference]: Without dead ends: 29 [2022-03-15 20:32:11,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 20:32:11,460 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:11,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-15 20:32:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-03-15 20:32:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 28 transitions. [2022-03-15 20:32:11,491 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 28 transitions. Word has length 4 [2022-03-15 20:32:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:11,491 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 28 transitions. [2022-03-15 20:32:11,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 28 transitions. [2022-03-15 20:32:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-03-15 20:32:11,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:11,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-03-15 20:32:11,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:32:11,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2274106, now seen corresponding path program 1 times [2022-03-15 20:32:11,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:11,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539087928] [2022-03-15 20:32:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:11,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:32:11,501 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-15 20:32:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:32:11,516 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-15 20:32:11,517 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-15 20:32:11,518 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 3 remaining) [2022-03-15 20:32:11,520 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location workerErr0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2022-03-15 20:32:11,521 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location workerErr0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2022-03-15 20:32:11,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 20:32:11,523 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-03-15 20:32:11,524 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-03-15 20:32:11,525 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-03-15 20:32:11,535 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 20:32:11,537 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:32:11,538 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 20:32:11,539 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 20:32:11,540 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:32:11,540 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 21 transitions, 60 flow [2022-03-15 20:32:11,540 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 21 transitions, 60 flow [2022-03-15 20:32:11,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 60 flow [2022-03-15 20:32:11,549 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2022-03-15 20:32:11,549 INFO L130 PetriNetUnfolder]: For 5/7 co-relation queries the response was YES. [2022-03-15 20:32:11,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 31 events. 3/31 cut-off events. For 5/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 22. Up to 5 conditions per place. [2022-03-15 20:32:11,551 INFO L116 LiptonReduction]: Number of co-enabled transitions 190 [2022-03-15 20:32:11,597 INFO L131 LiptonReduction]: Checked pairs total: 382 [2022-03-15 20:32:11,597 INFO L133 LiptonReduction]: Total number of compositions: 4 [2022-03-15 20:32:11,598 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 18 transitions, 54 flow [2022-03-15 20:32:11,621 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 168 states, 154 states have (on average 2.5064935064935066) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 154 states have (on average 2.5064935064935066) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-03-15 20:32:11,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:11,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-03-15 20:32:11,623 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash 3196381, now seen corresponding path program 1 times [2022-03-15 20:32:11,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:11,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222431911] [2022-03-15 20:32:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:11,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:11,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222431911] [2022-03-15 20:32:11,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222431911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:11,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:11,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 20:32:11,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [893629242] [2022-03-15 20:32:11,647 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:11,648 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:11,648 INFO L252 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2022-03-15 20:32:11,648 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:11,649 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:32:11,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:32:11,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:11,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:32:11,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:11,651 INFO L87 Difference]: Start difference. First operand has 168 states, 154 states have (on average 2.5064935064935066) internal successors, (386), 167 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:11,761 INFO L93 Difference]: Finished difference Result 454 states and 996 transitions. [2022-03-15 20:32:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:32:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-03-15 20:32:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:11,769 INFO L225 Difference]: With dead ends: 454 [2022-03-15 20:32:11,770 INFO L226 Difference]: Without dead ends: 416 [2022-03-15 20:32:11,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 20:32:11,771 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:11,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 9 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-15 20:32:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 316. [2022-03-15 20:32:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 306 states have (on average 2.418300653594771) internal successors, (740), 315 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 740 transitions. [2022-03-15 20:32:11,812 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 740 transitions. Word has length 4 [2022-03-15 20:32:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 740 transitions. [2022-03-15 20:32:11,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 740 transitions. [2022-03-15 20:32:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-03-15 20:32:11,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:11,814 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-03-15 20:32:11,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 20:32:11,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1222879504, now seen corresponding path program 1 times [2022-03-15 20:32:11,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:11,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098233794] [2022-03-15 20:32:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:11,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:11,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:11,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098233794] [2022-03-15 20:32:11,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098233794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:11,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:11,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:32:11,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [81707074] [2022-03-15 20:32:11,839 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:11,840 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:11,840 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2022-03-15 20:32:11,840 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:11,841 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:32:11,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:32:11,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:32:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:11,842 INFO L87 Difference]: Start difference. First operand 316 states and 740 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:11,867 INFO L93 Difference]: Finished difference Result 188 states and 388 transitions. [2022-03-15 20:32:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 20:32:11,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-03-15 20:32:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:11,869 INFO L225 Difference]: With dead ends: 188 [2022-03-15 20:32:11,870 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 20:32:11,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:11,871 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:11,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 20:32:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-03-15 20:32:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 175 states have (on average 2.12) internal successors, (371), 177 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 371 transitions. [2022-03-15 20:32:11,905 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 371 transitions. Word has length 6 [2022-03-15 20:32:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:11,905 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 371 transitions. [2022-03-15 20:32:11,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 371 transitions. [2022-03-15 20:32:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-03-15 20:32:11,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:11,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:11,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 20:32:11,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash 745424612, now seen corresponding path program 1 times [2022-03-15 20:32:11,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:11,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224786527] [2022-03-15 20:32:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:11,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:32:11,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:11,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224786527] [2022-03-15 20:32:11,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224786527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:11,973 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:11,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:32:11,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [357332031] [2022-03-15 20:32:11,973 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:11,974 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:11,974 INFO L252 McrAutomatonBuilder]: Finished intersection with 8 states and 7 transitions. [2022-03-15 20:32:11,974 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:11,975 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:32:11,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 20:32:11,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 20:32:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 20:32:11,976 INFO L87 Difference]: Start difference. First operand 178 states and 371 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:12,156 INFO L93 Difference]: Finished difference Result 275 states and 559 transitions. [2022-03-15 20:32:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 20:32:12,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-03-15 20:32:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:12,159 INFO L225 Difference]: With dead ends: 275 [2022-03-15 20:32:12,159 INFO L226 Difference]: Without dead ends: 271 [2022-03-15 20:32:12,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 20:32:12,160 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:12,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 8 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-15 20:32:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 103. [2022-03-15 20:32:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.99009900990099) internal successors, (201), 102 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 201 transitions. [2022-03-15 20:32:12,180 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 201 transitions. Word has length 7 [2022-03-15 20:32:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:12,181 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 201 transitions. [2022-03-15 20:32:12,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 201 transitions. [2022-03-15 20:32:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 20:32:12,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:12,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:12,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 20:32:12,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:12,189 INFO L85 PathProgramCache]: Analyzing trace with hash -906574214, now seen corresponding path program 1 times [2022-03-15 20:32:12,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:12,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995252590] [2022-03-15 20:32:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:12,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:32:12,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:12,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995252590] [2022-03-15 20:32:12,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995252590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:12,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:12,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:32:12,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1563878259] [2022-03-15 20:32:12,246 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:12,247 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:12,247 INFO L252 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2022-03-15 20:32:12,248 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:12,248 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:32:12,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:32:12,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:32:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:12,249 INFO L87 Difference]: Start difference. First operand 103 states and 201 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:12,321 INFO L93 Difference]: Finished difference Result 247 states and 476 transitions. [2022-03-15 20:32:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:32:12,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-15 20:32:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:12,323 INFO L225 Difference]: With dead ends: 247 [2022-03-15 20:32:12,324 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 20:32:12,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 20:32:12,333 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:12,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 6 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 20:32:12,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 145. [2022-03-15 20:32:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 2.076923076923077) internal successors, (297), 144 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 297 transitions. [2022-03-15 20:32:12,349 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 297 transitions. Word has length 9 [2022-03-15 20:32:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:12,349 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 297 transitions. [2022-03-15 20:32:12,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 297 transitions. [2022-03-15 20:32:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 20:32:12,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:12,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:12,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 20:32:12,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash -906483017, now seen corresponding path program 1 times [2022-03-15 20:32:12,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:12,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953615708] [2022-03-15 20:32:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:12,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:12,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953615708] [2022-03-15 20:32:12,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953615708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:12,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:12,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 20:32:12,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1187101124] [2022-03-15 20:32:12,397 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:12,398 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:12,399 INFO L252 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2022-03-15 20:32:12,399 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:12,399 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:32:12,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 20:32:12,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 20:32:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 20:32:12,400 INFO L87 Difference]: Start difference. First operand 145 states and 297 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:12,554 INFO L93 Difference]: Finished difference Result 309 states and 638 transitions. [2022-03-15 20:32:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 20:32:12,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-15 20:32:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:12,556 INFO L225 Difference]: With dead ends: 309 [2022-03-15 20:32:12,557 INFO L226 Difference]: Without dead ends: 145 [2022-03-15 20:32:12,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:32:12,560 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:12,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 8 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-15 20:32:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-15 20:32:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 2.06993006993007) internal successors, (296), 144 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 296 transitions. [2022-03-15 20:32:12,580 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 296 transitions. Word has length 9 [2022-03-15 20:32:12,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:12,580 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 296 transitions. [2022-03-15 20:32:12,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:12,580 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 296 transitions. [2022-03-15 20:32:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 20:32:12,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:12,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:12,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 20:32:12,581 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1587015242, now seen corresponding path program 1 times [2022-03-15 20:32:12,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:12,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461806142] [2022-03-15 20:32:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 20:32:12,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:12,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461806142] [2022-03-15 20:32:12,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461806142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:12,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011156337] [2022-03-15 20:32:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:12,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:12,691 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) [2022-03-15 20:32:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:12,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 20:32:12,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 20:32:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 20:32:12,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 20:32:13,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011156337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:13,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:13,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-15 20:32:13,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2014796367] [2022-03-15 20:32:13,032 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:13,033 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:13,035 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 18 transitions. [2022-03-15 20:32:13,035 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:13,044 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:32:13,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 20:32:13,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:13,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 20:32:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-03-15 20:32:13,046 INFO L87 Difference]: Start difference. First operand 145 states and 296 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2022-03-15 20:32:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:13,464 INFO L93 Difference]: Finished difference Result 504 states and 1030 transitions. [2022-03-15 20:32:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 20:32:13,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 16 [2022-03-15 20:32:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:13,465 INFO L225 Difference]: With dead ends: 504 [2022-03-15 20:32:13,465 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 20:32:13,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2022-03-15 20:32:13,467 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 89 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:13,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 8 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:32:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 20:32:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-03-15 20:32:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 152 states have (on average 2.026315789473684) internal successors, (308), 153 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 308 transitions. [2022-03-15 20:32:13,473 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 308 transitions. Word has length 16 [2022-03-15 20:32:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:13,473 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 308 transitions. [2022-03-15 20:32:13,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2022-03-15 20:32:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 308 transitions. [2022-03-15 20:32:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 20:32:13,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:13,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:13,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:13,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:13,675 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1167720210, now seen corresponding path program 1 times [2022-03-15 20:32:13,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:13,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448548494] [2022-03-15 20:32:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:13,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:13,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:13,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448548494] [2022-03-15 20:32:13,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448548494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:13,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139688026] [2022-03-15 20:32:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:13,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:13,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:13,813 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) [2022-03-15 20:32:13,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 20:32:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:13,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 20:32:13,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:14,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139688026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:14,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:14,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 26 [2022-03-15 20:32:14,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1226939904] [2022-03-15 20:32:14,286 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:14,288 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:14,292 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2022-03-15 20:32:14,293 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:14,397 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [4758#(<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0)), 4760#(or (not (<= ctr i)) (<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0))), 4759#(or (not (<= ctr (* 2 i))) (<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0))), 4757#(<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0))] [2022-03-15 20:32:14,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 20:32:14,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 20:32:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2022-03-15 20:32:14,398 INFO L87 Difference]: Start difference. First operand 154 states and 308 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-03-15 20:32:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:15,473 INFO L93 Difference]: Finished difference Result 458 states and 893 transitions. [2022-03-15 20:32:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 20:32:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 [2022-03-15 20:32:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:15,475 INFO L225 Difference]: With dead ends: 458 [2022-03-15 20:32:15,475 INFO L226 Difference]: Without dead ends: 211 [2022-03-15 20:32:15,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=909, Invalid=3647, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 20:32:15,478 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 190 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:15,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 30 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 20:32:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-15 20:32:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 165. [2022-03-15 20:32:15,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 163 states have (on average 1.9938650306748467) internal successors, (325), 164 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 325 transitions. [2022-03-15 20:32:15,483 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 325 transitions. Word has length 23 [2022-03-15 20:32:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:15,485 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 325 transitions. [2022-03-15 20:32:15,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-03-15 20:32:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 325 transitions. [2022-03-15 20:32:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 20:32:15,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:15,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:15,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 20:32:15,712 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,SelfDestructingSolverStorable8 [2022-03-15 20:32:15,713 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:15,713 INFO L85 PathProgramCache]: Analyzing trace with hash 118185628, now seen corresponding path program 2 times [2022-03-15 20:32:15,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:15,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597170894] [2022-03-15 20:32:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:15,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:32:15,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:15,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597170894] [2022-03-15 20:32:15,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597170894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:15,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457559216] [2022-03-15 20:32:15,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:32:15,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:15,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:15,814 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) [2022-03-15 20:32:15,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 20:32:15,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:32:15,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 20:32:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:15,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:16,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457559216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:16,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:16,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 20 [2022-03-15 20:32:16,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [41439186] [2022-03-15 20:32:16,076 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:16,078 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:16,082 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 37 transitions. [2022-03-15 20:32:16,082 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:16,195 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [5776#(or (<= 1 ctr) (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0))), 5775#(or (not (<= ctr (* 2 i))) (<= (* 2 i) (+ ctr workerThread2of2ForFork0_thidvar0))), 5778#(or (<= 1 ctr) (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0)) (not (< 0 i))), 5777#(or (not (<= ctr i)) (<= i (+ ctr workerThread2of2ForFork0_thidvar0)))] [2022-03-15 20:32:16,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 20:32:16,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:16,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 20:32:16,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-15 20:32:16,197 INFO L87 Difference]: Start difference. First operand 165 states and 325 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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) [2022-03-15 20:32:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:17,413 INFO L93 Difference]: Finished difference Result 480 states and 954 transitions. [2022-03-15 20:32:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 20:32:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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 23 [2022-03-15 20:32:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:17,416 INFO L225 Difference]: With dead ends: 480 [2022-03-15 20:32:17,416 INFO L226 Difference]: Without dead ends: 477 [2022-03-15 20:32:17,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1144, Invalid=4258, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 20:32:17,418 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 215 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:17,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 14 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 20:32:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-15 20:32:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 113. [2022-03-15 20:32:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.7927927927927927) internal successors, (199), 112 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 199 transitions. [2022-03-15 20:32:17,440 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 199 transitions. Word has length 23 [2022-03-15 20:32:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:17,440 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 199 transitions. [2022-03-15 20:32:17,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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) [2022-03-15 20:32:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 199 transitions. [2022-03-15 20:32:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 20:32:17,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:17,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-15 20:32:17,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:17,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:17,652 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1958195172, now seen corresponding path program 1 times [2022-03-15 20:32:17,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:17,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393075728] [2022-03-15 20:32:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:17,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:17,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393075728] [2022-03-15 20:32:17,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393075728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:17,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363101271] [2022-03-15 20:32:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:17,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:17,807 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) [2022-03-15 20:32:17,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 20:32:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 20:32:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:18,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:18,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363101271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:18,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:18,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 33 [2022-03-15 20:32:18,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1733844822] [2022-03-15 20:32:18,438 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:18,442 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:18,449 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 56 transitions. [2022-03-15 20:32:18,449 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:18,773 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [6797#(or (not (<= ctr i)) (<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0))), 6793#(or (<= (+ 3 ctr) (* 2 workerThread1of2ForFork0_thidvar0)) (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0)) (not (< 0 i))), 6796#(or (not (<= ctr (* 2 i))) (<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0))), 6794#(or (<= (+ 3 ctr) (* 2 workerThread1of2ForFork0_thidvar0)) (not (< 0 i))), 6791#(<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0)), 6790#(<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0)), 6792#(or (<= (+ 3 ctr) (* 2 workerThread1of2ForFork0_thidvar0)) (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0))), 6795#(or (<= (+ 3 ctr) (+ i (* 2 workerThread1of2ForFork0_thidvar0))) (not (< 0 i)))] [2022-03-15 20:32:18,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 20:32:18,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 20:32:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 20:32:18,774 INFO L87 Difference]: Start difference. First operand 113 states and 199 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:22,766 INFO L93 Difference]: Finished difference Result 922 states and 1685 transitions. [2022-03-15 20:32:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-15 20:32:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 20:32:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:22,771 INFO L225 Difference]: With dead ends: 922 [2022-03-15 20:32:22,771 INFO L226 Difference]: Without dead ends: 922 [2022-03-15 20:32:22,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8713 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3794, Invalid=23266, Unknown=0, NotChecked=0, Total=27060 [2022-03-15 20:32:22,777 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 292 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:22,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 56 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 20:32:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-03-15 20:32:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 297. [2022-03-15 20:32:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 295 states have (on average 2.0033898305084747) internal successors, (591), 296 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 591 transitions. [2022-03-15 20:32:22,792 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 591 transitions. Word has length 30 [2022-03-15 20:32:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:22,793 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 591 transitions. [2022-03-15 20:32:22,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 591 transitions. [2022-03-15 20:32:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 20:32:22,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:22,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-15 20:32:22,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:23,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:23,018 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:23,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1978059042, now seen corresponding path program 2 times [2022-03-15 20:32:23,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:23,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256863308] [2022-03-15 20:32:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:23,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:23,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:23,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256863308] [2022-03-15 20:32:23,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256863308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:23,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674993568] [2022-03-15 20:32:23,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:32:23,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:23,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:23,192 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) [2022-03-15 20:32:23,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 20:32:23,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:32:23,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 20:32:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:23,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:23,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674993568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:23,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:23,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 37 [2022-03-15 20:32:23,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1374953165] [2022-03-15 20:32:23,805 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:23,808 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:23,813 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 58 transitions. [2022-03-15 20:32:23,813 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:24,160 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [8779#(or (not (<= ctr (* 2 i))) (<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0))), 8780#(or (not (<= ctr i)) (<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0))), 8776#(or (<= (+ ctr 4) (+ (* 2 i) workerThread1of2ForFork0_thidvar0)) (not (< 0 i))), 8774#(or (<= (+ 5 ctr) i) (not (= (+ (- 1) i) workerThread1of2ForFork0_thidvar0)) (not (< 0 i))), 8778#(or (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0)) (<= (+ 3 ctr) (+ i workerThread1of2ForFork0_thidvar0)) (not (< 0 i))), 8775#(or (<= (+ ctr 4) (+ i workerThread1of2ForFork0_thidvar0)) (not (< 0 i))), 8771#(<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0)), 8773#(or (<= (+ 5 ctr) i) (not (= (+ (- 1) i) workerThread1of2ForFork0_thidvar0))), 8772#(<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0)), 8777#(or (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0)) (<= (+ 3 ctr) (+ i workerThread1of2ForFork0_thidvar0)))] [2022-03-15 20:32:24,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 20:32:24,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 20:32:24,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2028, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 20:32:24,162 INFO L87 Difference]: Start difference. First operand 297 states and 591 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:29,640 INFO L93 Difference]: Finished difference Result 2561 states and 4966 transitions. [2022-03-15 20:32:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-03-15 20:32:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 20:32:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:29,653 INFO L225 Difference]: With dead ends: 2561 [2022-03-15 20:32:29,653 INFO L226 Difference]: Without dead ends: 2561 [2022-03-15 20:32:29,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17924 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6468, Invalid=44382, Unknown=0, NotChecked=0, Total=50850 [2022-03-15 20:32:29,660 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 360 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:29,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 38 Invalid, 3218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 20:32:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-03-15 20:32:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 897. [2022-03-15 20:32:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 895 states have (on average 2.081564245810056) internal successors, (1863), 896 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1863 transitions. [2022-03-15 20:32:29,696 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1863 transitions. Word has length 30 [2022-03-15 20:32:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:29,697 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1863 transitions. [2022-03-15 20:32:29,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1863 transitions. [2022-03-15 20:32:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 20:32:29,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:29,698 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-15 20:32:29,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:29,919 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,SelfDestructingSolverStorable11 [2022-03-15 20:32:29,920 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2117511514, now seen corresponding path program 3 times [2022-03-15 20:32:29,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:29,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872181286] [2022-03-15 20:32:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-15 20:32:29,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:29,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872181286] [2022-03-15 20:32:29,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872181286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:29,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:29,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:32:29,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2048111863] [2022-03-15 20:32:29,950 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:29,953 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:29,958 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 56 transitions. [2022-03-15 20:32:29,958 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:30,008 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13493#(or (<= i workerThread2of2ForFork0_thidvar0) (not (< 0 i)))] [2022-03-15 20:32:30,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:32:30,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:30,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:32:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:30,009 INFO L87 Difference]: Start difference. First operand 897 states and 1863 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:30,036 INFO L93 Difference]: Finished difference Result 1177 states and 2376 transitions. [2022-03-15 20:32:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 20:32:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 20:32:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:30,041 INFO L225 Difference]: With dead ends: 1177 [2022-03-15 20:32:30,041 INFO L226 Difference]: Without dead ends: 1177 [2022-03-15 20:32:30,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:30,043 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:30,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 3 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-03-15 20:32:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1026. [2022-03-15 20:32:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1023 states have (on average 2.0606060606060606) internal successors, (2108), 1025 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 2108 transitions. [2022-03-15 20:32:30,068 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 2108 transitions. Word has length 30 [2022-03-15 20:32:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:30,068 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 2108 transitions. [2022-03-15 20:32:30,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:30,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 2108 transitions. [2022-03-15 20:32:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 20:32:30,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:30,070 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-15 20:32:30,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-15 20:32:30,070 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:30,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1675697579, now seen corresponding path program 3 times [2022-03-15 20:32:30,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:30,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482501380] [2022-03-15 20:32:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:30,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-15 20:32:30,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:30,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482501380] [2022-03-15 20:32:30,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482501380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:30,111 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:32:30,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:32:30,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [849961854] [2022-03-15 20:32:30,112 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:30,116 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:30,123 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 75 transitions. [2022-03-15 20:32:30,123 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:30,184 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16726#(or (<= i workerThread1of2ForFork0_thidvar0) (not (< 0 i)))] [2022-03-15 20:32:30,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:32:30,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:32:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:30,185 INFO L87 Difference]: Start difference. First operand 1026 states and 2108 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:30,206 INFO L93 Difference]: Finished difference Result 954 states and 1887 transitions. [2022-03-15 20:32:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 20:32:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 20:32:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:30,211 INFO L225 Difference]: With dead ends: 954 [2022-03-15 20:32:30,211 INFO L226 Difference]: Without dead ends: 952 [2022-03-15 20:32:30,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:32:30,212 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:30,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 7 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:32:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-03-15 20:32:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 704. [2022-03-15 20:32:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 700 states have (on average 1.9614285714285715) internal successors, (1373), 703 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1373 transitions. [2022-03-15 20:32:30,228 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1373 transitions. Word has length 37 [2022-03-15 20:32:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:30,228 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1373 transitions. [2022-03-15 20:32:30,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1373 transitions. [2022-03-15 20:32:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 20:32:30,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:30,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2022-03-15 20:32:30,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-15 20:32:30,230 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1835013921, now seen corresponding path program 4 times [2022-03-15 20:32:30,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:30,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438622865] [2022-03-15 20:32:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:30,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:30,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:30,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438622865] [2022-03-15 20:32:30,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438622865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:30,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805423355] [2022-03-15 20:32:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 20:32:30,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:30,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:30,422 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) [2022-03-15 20:32:30,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 20:32:30,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 20:32:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 20:32:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:30,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:31,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805423355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:31,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:31,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 44 [2022-03-15 20:32:31,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1993866270] [2022-03-15 20:32:31,083 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:31,086 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:31,092 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 75 transitions. [2022-03-15 20:32:31,092 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:31,554 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [19351#(or (<= (+ 5 ctr) workerThread2of2ForFork0_thidvar0) (not (< 0 i))), 19359#(or (not (<= ctr i)) (<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0))), 19357#(<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0)), 19353#(or (<= (+ 5 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0)) (not (< 0 i))), 19352#(or (<= (+ 5 ctr) (+ i workerThread2of2ForFork0_thidvar0)) (not (< 0 i))), 19355#(or (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0)) (<= (+ 3 ctr) (+ i workerThread1of2ForFork0_thidvar0)) (not (< 0 i))), 19358#(or (not (<= ctr (* 2 i))) (<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0))), 19354#(or (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0)) (<= (+ 3 ctr) (+ i workerThread1of2ForFork0_thidvar0))), 19356#(<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0)), 19361#(or (<= (+ ctr 4) workerThread1of2ForFork0_thidvar0) (not (< 0 i))), 19360#(or (<= (+ ctr i 4) (+ workerThread1of2ForFork0_thidvar0 workerThread2of2ForFork0_thidvar0)) (not (< 0 i)))] [2022-03-15 20:32:31,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 20:32:31,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:31,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 20:32:31,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=2787, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 20:32:31,556 INFO L87 Difference]: Start difference. First operand 704 states and 1373 transitions. Second operand has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:35,311 INFO L93 Difference]: Finished difference Result 3518 states and 6536 transitions. [2022-03-15 20:32:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-15 20:32:35,315 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 20:32:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:35,325 INFO L225 Difference]: With dead ends: 3518 [2022-03-15 20:32:35,326 INFO L226 Difference]: Without dead ends: 3518 [2022-03-15 20:32:35,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10103 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4038, Invalid=28182, Unknown=0, NotChecked=0, Total=32220 [2022-03-15 20:32:35,329 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 265 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 3026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:35,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 36 Invalid, 3026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2614 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 20:32:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2022-03-15 20:32:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 1621. [2022-03-15 20:32:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1617 states have (on average 1.9709338280766853) internal successors, (3187), 1620 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3187 transitions. [2022-03-15 20:32:35,380 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3187 transitions. Word has length 37 [2022-03-15 20:32:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:35,380 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 3187 transitions. [2022-03-15 20:32:35,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3187 transitions. [2022-03-15 20:32:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 20:32:35,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:35,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2022-03-15 20:32:35,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:35,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 20:32:35,596 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 71897225, now seen corresponding path program 5 times [2022-03-15 20:32:35,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:35,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794605879] [2022-03-15 20:32:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:35,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:35,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:35,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794605879] [2022-03-15 20:32:35,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794605879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:35,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167767538] [2022-03-15 20:32:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 20:32:35,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:35,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:35,754 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) [2022-03-15 20:32:35,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 20:32:35,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 20:32:35,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:35,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 20:32:35,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:32:36,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:32:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:32:36,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167767538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:32:36,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:32:36,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 15] total 42 [2022-03-15 20:32:36,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [194038755] [2022-03-15 20:32:36,490 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:36,492 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:36,498 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 75 transitions. [2022-03-15 20:32:36,498 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:36,977 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [26629#(or (<= (+ 5 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0)) (not (< 0 i))), 26633#(<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0)), 26630#(or (<= (+ 3 ctr (* 2 i)) (+ workerThread2of2ForFork0_thidvar0 (* 2 workerThread1of2ForFork0_thidvar0))) (not (< 0 i))), 26635#(or (not (<= ctr (* 2 i))) (<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0))), 26636#(or (not (<= ctr i)) (<= (+ 2 ctr) (+ i workerThread2of2ForFork0_thidvar0))), 26631#(or (<= (+ 3 ctr) (* 2 workerThread1of2ForFork0_thidvar0)) (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0))), 26634#(<= (+ 2 ctr) (+ (* 2 i) workerThread2of2ForFork0_thidvar0)), 26632#(or (<= (+ 3 ctr) (* 2 workerThread1of2ForFork0_thidvar0)) (not (= (+ (- 1) i) workerThread2of2ForFork0_thidvar0)) (not (< 0 i))), 26637#(or (<= (+ 3 ctr i) (* 2 workerThread1of2ForFork0_thidvar0)) (not (< 0 i))), 26628#(or (<= (+ 5 ctr) (+ i workerThread2of2ForFork0_thidvar0)) (not (< 0 i)))] [2022-03-15 20:32:36,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 20:32:36,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 20:32:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 20:32:36,978 INFO L87 Difference]: Start difference. First operand 1621 states and 3187 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2022-03-15 20:32:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:39,600 INFO L93 Difference]: Finished difference Result 6228 states and 11796 transitions. [2022-03-15 20:32:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 20:32:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 37 [2022-03-15 20:32:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:39,618 INFO L225 Difference]: With dead ends: 6228 [2022-03-15 20:32:39,618 INFO L226 Difference]: Without dead ends: 6228 [2022-03-15 20:32:39,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4957 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2542, Invalid=15818, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 20:32:39,621 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 171 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:39,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 35 Invalid, 2522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 20:32:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6228 states. [2022-03-15 20:32:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6228 to 3659. [2022-03-15 20:32:39,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3655 states have (on average 1.9942544459644322) internal successors, (7289), 3658 states have internal predecessors, (7289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 7289 transitions. [2022-03-15 20:32:39,734 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 7289 transitions. Word has length 37 [2022-03-15 20:32:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:39,734 INFO L470 AbstractCegarLoop]: Abstraction has 3659 states and 7289 transitions. [2022-03-15 20:32:39,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2022-03-15 20:32:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 7289 transitions. [2022-03-15 20:32:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 20:32:39,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:32:39,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2022-03-15 20:32:39,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:39,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:39,951 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting workerErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT, workerErr0ASSERT_VIOLATIONASSERT] === [2022-03-15 20:32:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:32:39,952 INFO L85 PathProgramCache]: Analyzing trace with hash 88964585, now seen corresponding path program 6 times [2022-03-15 20:32:39,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:32:39,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613192016] [2022-03-15 20:32:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:32:39,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:32:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:32:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:32:40,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:32:40,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613192016] [2022-03-15 20:32:40,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613192016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:32:40,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656322631] [2022-03-15 20:32:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 20:32:40,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:32:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:32:40,164 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) [2022-03-15 20:32:40,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 20:32:40,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 20:32:40,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:32:40,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 20:32:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:32:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-15 20:32:40,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 20:32:40,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656322631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:32:40,349 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 20:32:40,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [19] total 26 [2022-03-15 20:32:40,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1755557356] [2022-03-15 20:32:40,349 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:32:40,351 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:32:40,357 INFO L252 McrAutomatonBuilder]: Finished intersection with 58 states and 77 transitions. [2022-03-15 20:32:40,357 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:32:40,451 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [40484#(or (<= ctr i) (not (< 0 i))), 40485#(or (<= ctr (* 2 i)) (not (< 0 i))), 40483#(or (<= ctr 0) (not (< 0 i)))] [2022-03-15 20:32:40,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 20:32:40,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:32:40,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 20:32:40,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-15 20:32:40,452 INFO L87 Difference]: Start difference. First operand 3659 states and 7289 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 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) [2022-03-15 20:32:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:32:40,518 INFO L93 Difference]: Finished difference Result 3807 states and 7537 transitions. [2022-03-15 20:32:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 20:32:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 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 37 [2022-03-15 20:32:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:32:40,519 INFO L225 Difference]: With dead ends: 3807 [2022-03-15 20:32:40,519 INFO L226 Difference]: Without dead ends: 0 [2022-03-15 20:32:40,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-15 20:32:40,519 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:32:40,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 2 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:32:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-15 20:32:40,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-15 20:32:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:32:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-15 20:32:40,520 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2022-03-15 20:32:40,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:32:40,520 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-15 20:32:40,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 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) [2022-03-15 20:32:40,520 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-15 20:32:40,520 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-15 20:32:40,520 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 4 remaining) [2022-03-15 20:32:40,521 INFO L764 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2022-03-15 20:32:40,521 INFO L764 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2022-03-15 20:32:40,521 INFO L764 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2022-03-15 20:32:40,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 20:32:40,742 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,SelfDestructingSolverStorable16 [2022-03-15 20:32:40,743 INFO L732 BasicCegarLoop]: Path program histogram: [6, 3, 1, 1, 1, 1, 1, 1] [2022-03-15 20:32:40,745 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2022-03-15 20:32:40,745 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 20:32:40,748 INFO L202 PluginConnector]: Adding new model TwoActiveWorkersSirius.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 08:32:40 BasicIcfg [2022-03-15 20:32:40,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 20:32:40,748 INFO L158 Benchmark]: Toolchain (without parser) took 30185.25ms. Allocated memory was 198.2MB in the beginning and 316.7MB in the end (delta: 118.5MB). Free memory was 155.2MB in the beginning and 187.3MB in the end (delta: -32.1MB). Peak memory consumption was 89.0MB. Max. memory is 8.0GB. [2022-03-15 20:32:40,748 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 198.2MB. Free memory is still 156.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:32:40,749 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.10ms. Allocated memory is still 198.2MB. Free memory was 155.2MB in the beginning and 153.6MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 20:32:40,749 INFO L158 Benchmark]: Boogie Preprocessor took 10.31ms. Allocated memory is still 198.2MB. Free memory was 153.6MB in the beginning and 152.7MB in the end (delta: 911.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:32:40,749 INFO L158 Benchmark]: RCFGBuilder took 213.89ms. Allocated memory is still 198.2MB. Free memory was 152.7MB in the beginning and 144.4MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 20:32:40,749 INFO L158 Benchmark]: TraceAbstraction took 29929.95ms. Allocated memory was 198.2MB in the beginning and 316.7MB in the end (delta: 118.5MB). Free memory was 143.9MB in the beginning and 187.3MB in the end (delta: -43.3MB). Peak memory consumption was 76.4MB. Max. memory is 8.0GB. [2022-03-15 20:32:40,750 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 0.13ms. Allocated memory is still 198.2MB. Free memory is still 156.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.10ms. Allocated memory is still 198.2MB. Free memory was 155.2MB in the beginning and 153.6MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.31ms. Allocated memory is still 198.2MB. Free memory was 153.6MB in the beginning and 152.7MB in the end (delta: 911.5kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 213.89ms. Allocated memory is still 198.2MB. Free memory was 152.7MB in the beginning and 144.4MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 29929.95ms. Allocated memory was 198.2MB in the beginning and 316.7MB in the end (delta: 118.5MB). Free memory was 143.9MB in the beginning and 187.3MB in the end (delta: -43.3MB). Peak memory consumption was 76.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 16 PlacesBefore, 14 PlacesAfterwards, 14 TransitionsBefore, 12 TransitionsAfterwards, 50 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 89 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 82, positive: 68, positive conditional: 0, positive unconditional: 68, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 29, positive: 21, positive conditional: 0, positive unconditional: 21, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 82, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 29, unknown conditional: 0, unknown unconditional: 29] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 24 PlacesBefore, 21 PlacesAfterwards, 21 TransitionsBefore, 18 TransitionsAfterwards, 190 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 382 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 177, positive: 153, positive conditional: 0, positive unconditional: 153, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 80, positive: 65, positive conditional: 0, positive unconditional: 65, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 177, positive: 88, positive conditional: 0, positive unconditional: 88, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 80, unknown conditional: 0, unknown unconditional: 80] , Statistics on independence cache: Total cache size (in pairs): 43, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 30]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22 IncrementalHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 2 mSDtfsCounter, 22 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 26 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 29.2s, OverallIterations: 15, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 19.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1809 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1809 mSDsluCounter, 261 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 222 mSDsCounter, 2027 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12213 IncrementalHoareTripleChecker+Invalid, 14240 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2027 mSolverCounterUnsat, 51 mSDtfsCounter, 12213 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1304 GetRequests, 376 SyntacticMatches, 9 SemanticMatches, 919 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44483 ImplicationChecksByTransitivity, 16.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3659occurred in iteration=14, InterpolantAutomatonStates: 739, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 7932 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 568 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 734 ConstructedInterpolants, 0 QuantifiedInterpolants, 4319 SizeOfPredicates, 13 NumberOfNonLiveVariables, 429 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 30 InterpolantComputations, 8 PerfectInterpolantSequences, 293/772 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-15 20:32:40,783 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 Received shutdown request...