/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/gemcutter/NewStatesSleep-VarAbsGlobalSyntactic.epf -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -i ../../../trunk/examples/boogie-benchmarks-from-svcomp-memsafety-concurrent/airline-25.line356.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.por-optimizations-5c708e3-m [2022-09-29 20:17:59,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-29 20:17:59,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-29 20:17:59,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-09-29 20:17:59,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-29 20:17:59,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-29 20:17:59,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-29 20:17:59,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-29 20:17:59,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-29 20:17:59,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-29 20:17:59,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-29 20:17:59,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-29 20:17:59,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-29 20:17:59,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-29 20:17:59,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-29 20:17:59,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-29 20:17:59,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-09-29 20:17:59,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-29 20:17:59,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-29 20:17:59,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-29 20:17:59,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/gemcutter/NewStatesSleep-VarAbsGlobalSyntactic.epf [2022-09-29 20:17:59,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-29 20:17:59,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-29 20:17:59,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-29 20:17:59,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-09-29 20:17:59,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-29 20:17:59,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-29 20:17:59,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-29 20:17:59,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-29 20:17:59,788 INFO L138 SettingsManager]: * Use SBE=true [2022-09-29 20:17:59,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-29 20:17:59,788 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-29 20:17:59,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-29 20:17:59,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-29 20:17:59,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-29 20:17:59,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-29 20:17:59,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-29 20:17:59,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-29 20:17:59,789 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-29 20:17:59,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-29 20:17:59,789 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-29 20:17:59,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-29 20:17:59,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-29 20:17:59,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-29 20:17:59,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-29 20:17:59,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-29 20:17:59,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-29 20:17:59,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-29 20:17:59,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-29 20:17:59,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-29 20:17:59,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * Abstraction used for commutativity in POR=VARIABLES_GLOBAL [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_ERROR_LOCATION [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-09-29 20:17:59,791 INFO L138 SettingsManager]: * Independence relation used for POR in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-29 20:18:00,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-29 20:18:00,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-29 20:18:00,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-29 20:18:00,039 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-09-29 20:18:00,040 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-09-29 20:18:00,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/boogie-benchmarks-from-svcomp-memsafety-concurrent/airline-25.line356.bpl [2022-09-29 20:18:00,041 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/boogie-benchmarks-from-svcomp-memsafety-concurrent/airline-25.line356.bpl' [2022-09-29 20:18:00,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-29 20:18:00,079 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2022-09-29 20:18:00,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-29 20:18:00,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-29 20:18:00,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-29 20:18:00,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/1) ... [2022-09-29 20:18:00,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/1) ... [2022-09-29 20:18:00,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/1) ... [2022-09-29 20:18:00,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/1) ... [2022-09-29 20:18:00,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/1) ... [2022-09-29 20:18:00,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/1) ... [2022-09-29 20:18:00,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/1) ... [2022-09-29 20:18:00,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-29 20:18:00,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-29 20:18:00,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-29 20:18:00,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-29 20:18:00,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/1) ... [2022-09-29 20:18:00,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-29 20:18:00,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:00,162 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) [2022-09-29 20:18:00,171 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 [2022-09-29 20:18:00,201 INFO L130 BoogieDeclarations]: Found specification of procedure salethread [2022-09-29 20:18:00,201 INFO L138 BoogieDeclarations]: Found implementation of procedure salethread [2022-09-29 20:18:00,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-29 20:18:00,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-29 20:18:00,203 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-29 20:18:00,308 INFO L234 CfgBuilder]: Building ICFG [2022-09-29 20:18:00,309 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-29 20:18:00,551 INFO L275 CfgBuilder]: Performing block encoding [2022-09-29 20:18:00,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-29 20:18:00,567 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-29 20:18:00,569 INFO L202 PluginConnector]: Adding new model airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 08:18:00 BoogieIcfgContainer [2022-09-29 20:18:00,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-29 20:18:00,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-29 20:18:00,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-29 20:18:00,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-29 20:18:00,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.09 08:18:00" (1/2) ... [2022-09-29 20:18:00,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed6f2ee and model type airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.09 08:18:00, skipping insertion in model container [2022-09-29 20:18:00,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "airline-25.line356.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.09 08:18:00" (2/2) ... [2022-09-29 20:18:00,586 INFO L112 eAbstractionObserver]: Analyzing ICFG airline-25.line356.bpl [2022-09-29 20:18:00,594 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-09-29 20:18:00,603 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-29 20:18:00,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-29 20:18:00,603 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-29 20:18:00,658 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-09-29 20:18:00,700 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:18:00,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:18:00,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:00,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:18:00,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-09-29 20:18:00,739 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:18:00,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONASSERT ======== [2022-09-29 20:18:00,752 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:18:00,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:18:00,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:00,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:00,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2012424466, now seen corresponding path program 1 times [2022-09-29 20:18:00,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:00,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979709765] [2022-09-29 20:18:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:00,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:01,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:01,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979709765] [2022-09-29 20:18:01,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979709765] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-29 20:18:01,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-29 20:18:01,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-29 20:18:01,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635874898] [2022-09-29 20:18:01,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-29 20:18:01,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-29 20:18:01,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-29 20:18:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-09-29 20:18:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:01,319 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:01,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:01,320 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:01,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-29 20:18:01,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:01,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1861439793, now seen corresponding path program 1 times [2022-09-29 20:18:01,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:01,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063103490] [2022-09-29 20:18:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:01,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:01,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:01,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063103490] [2022-09-29 20:18:01,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063103490] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-29 20:18:01,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167325456] [2022-09-29 20:18:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:01,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:18:01,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:01,832 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) [2022-09-29 20:18:01,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-29 20:18:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:01,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-29 20:18:01,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 20:18:02,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-29 20:18:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:02,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-29 20:18:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:02,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167325456] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-29 20:18:02,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-29 20:18:02,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-09-29 20:18:02,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614139050] [2022-09-29 20:18:02,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-29 20:18:02,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-29 20:18:02,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:02,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-29 20:18:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-09-29 20:18:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:02,715 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 7.947368421052632) internal successors, (151), 20 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:02,716 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:02,716 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-09-29 20:18:03,038 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (0 of 1 remaining) [2022-09-29 20:18:03,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-29 20:18:03,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-09-29 20:18:03,259 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-29 20:18:03,261 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT was SAFE (1/2) [2022-09-29 20:18:03,266 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:18:03,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:18:03,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:03,272 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:18:03,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (4)] Waiting until timeout for monitored process [2022-09-29 20:18:03,277 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:18:03,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES ======== [2022-09-29 20:18:03,279 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:18:03,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:18:03,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-29 20:18:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash -569700941, now seen corresponding path program 1 times [2022-09-29 20:18:03,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:03,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747281765] [2022-09-29 20:18:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:03,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 20:18:03,380 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 20:18:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 20:18:03,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 20:18:03,454 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-29 20:18:03,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2022-09-29 20:18:03,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-29 20:18:03,456 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-09-29 20:18:03,456 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES was UNSAFE (2/2) [2022-09-29 20:18:03,457 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-29 20:18:03,457 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-09-29 20:18:03,483 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-29 20:18:03,489 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:18:03,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:18:03,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:03,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:18:03,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (5)] Waiting until timeout for monitored process [2022-09-29 20:18:03,537 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:18:03,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONASSERT ======== [2022-09-29 20:18:03,538 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:18:03,538 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:18:03,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:03,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:03,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2036144402, now seen corresponding path program 1 times [2022-09-29 20:18:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619891275] [2022-09-29 20:18:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:03,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:03,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:03,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619891275] [2022-09-29 20:18:03,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619891275] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-29 20:18:03,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-29 20:18:03,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-29 20:18:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221764470] [2022-09-29 20:18:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-29 20:18:03,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-29 20:18:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-29 20:18:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-09-29 20:18:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:03,702 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:03,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:03,702 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:03,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-29 20:18:03,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:03,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash -356732349, now seen corresponding path program 1 times [2022-09-29 20:18:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:03,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223054069] [2022-09-29 20:18:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:04,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:04,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223054069] [2022-09-29 20:18:04,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223054069] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-29 20:18:04,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195157595] [2022-09-29 20:18:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:04,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:18:04,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:04,027 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) [2022-09-29 20:18:04,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-29 20:18:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:04,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-29 20:18:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 20:18:04,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-29 20:18:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:04,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-29 20:18:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:04,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195157595] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-29 20:18:04,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-29 20:18:04,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-09-29 20:18:04,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712316974] [2022-09-29 20:18:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-29 20:18:04,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-29 20:18:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-29 20:18:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-09-29 20:18:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:04,648 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:04,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 7.947368421052632) internal successors, (151), 20 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:04,648 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:04,649 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-09-29 20:18:05,404 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (0 of 1 remaining) [2022-09-29 20:18:05,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-29 20:18:05,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:18:05,633 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-29 20:18:05,633 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT was SAFE (1/2) [2022-09-29 20:18:05,636 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:18:05,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:18:05,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:05,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:18:05,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (7)] Waiting until timeout for monitored process [2022-09-29 20:18:05,642 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:18:05,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES ======== [2022-09-29 20:18:05,643 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:18:05,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:18:05,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-29 20:18:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash 469820745, now seen corresponding path program 1 times [2022-09-29 20:18:05,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:05,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181239599] [2022-09-29 20:18:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:05,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 20:18:05,711 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 20:18:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 20:18:05,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 20:18:05,740 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-29 20:18:05,740 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2022-09-29 20:18:05,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-29 20:18:05,740 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-09-29 20:18:05,741 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES was UNSAFE (2/2) [2022-09-29 20:18:05,741 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-29 20:18:05,741 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-09-29 20:18:05,754 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-29 20:18:05,757 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:18:05,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:18:05,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:05,763 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:18:05,772 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:18:05,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONASSERT ======== [2022-09-29 20:18:05,773 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:18:05,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:18:05,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1469813138, now seen corresponding path program 1 times [2022-09-29 20:18:05,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:05,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940227170] [2022-09-29 20:18:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:05,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:05,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (8)] Waiting until timeout for monitored process [2022-09-29 20:18:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:05,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:05,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940227170] [2022-09-29 20:18:05,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940227170] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-29 20:18:05,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-29 20:18:05,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-29 20:18:05,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138101771] [2022-09-29 20:18:05,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-29 20:18:05,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-29 20:18:05,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:05,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-29 20:18:05,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-09-29 20:18:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:05,902 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:05,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:05,902 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:06,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-29 20:18:06,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:06,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:06,010 INFO L85 PathProgramCache]: Analyzing trace with hash 823495157, now seen corresponding path program 1 times [2022-09-29 20:18:06,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:06,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377529492] [2022-09-29 20:18:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:06,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:06,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:06,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377529492] [2022-09-29 20:18:06,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377529492] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-29 20:18:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219812834] [2022-09-29 20:18:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:06,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:18:06,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:06,139 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) [2022-09-29 20:18:06,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-29 20:18:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-29 20:18:06,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 20:18:06,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-29 20:18:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:06,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-29 20:18:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:06,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219812834] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-29 20:18:06,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-29 20:18:06,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-09-29 20:18:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470488180] [2022-09-29 20:18:06,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-29 20:18:06,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-29 20:18:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-29 20:18:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-09-29 20:18:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:06,752 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:06,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 7.947368421052632) internal successors, (151), 20 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:06,752 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:06,752 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-29 20:18:07,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-29 20:18:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-09-29 20:18:07,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:07,357 INFO L85 PathProgramCache]: Analyzing trace with hash 127461310, now seen corresponding path program 1 times [2022-09-29 20:18:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:07,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424411495] [2022-09-29 20:18:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:07,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:07,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:07,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424411495] [2022-09-29 20:18:07,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424411495] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-29 20:18:07,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301378328] [2022-09-29 20:18:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:18:07,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:07,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-29 20:18:07,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-29 20:18:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:07,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2022-09-29 20:18:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 20:18:07,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-29 20:18:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:08,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-29 20:18:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:08,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301378328] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-29 20:18:08,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-29 20:18:08,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-09-29 20:18:08,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392916053] [2022-09-29 20:18:08,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-29 20:18:08,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-29 20:18:08,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-29 20:18:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-09-29 20:18:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:08,740 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:08,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 8.09375) internal successors, (259), 33 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:08,740 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:08,740 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 17 states. [2022-09-29 20:18:08,740 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-29 20:18:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-09-29 20:18:14,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (0 of 1 remaining) [2022-09-29 20:18:14,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-29 20:18:14,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:18:14,621 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-09-29 20:18:14,621 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT was SAFE (1/2) [2022-09-29 20:18:14,737 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:18:14,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:18:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:14,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:18:14,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (11)] Waiting until timeout for monitored process [2022-09-29 20:18:14,771 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:18:14,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES ======== [2022-09-29 20:18:14,771 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:18:14,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:18:14,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-29 20:18:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:14,837 INFO L85 PathProgramCache]: Analyzing trace with hash 247014916, now seen corresponding path program 1 times [2022-09-29 20:18:14,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:14,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939007547] [2022-09-29 20:18:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:14,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 20:18:14,855 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 20:18:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 20:18:14,886 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 20:18:14,886 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-29 20:18:14,886 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2022-09-29 20:18:14,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-09-29 20:18:14,887 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-09-29 20:18:14,887 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES was UNSAFE (2/2) [2022-09-29 20:18:14,888 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-29 20:18:14,888 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-09-29 20:18:14,902 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-09-29 20:18:14,904 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:18:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:18:14,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:14,907 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:18:14,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (12)] Waiting until timeout for monitored process [2022-09-29 20:18:14,918 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:18:14,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONASSERT ======== [2022-09-29 20:18:14,919 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:18:14,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:18:14,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash 313430674, now seen corresponding path program 1 times [2022-09-29 20:18:14,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:14,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572854034] [2022-09-29 20:18:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:14,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:15,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572854034] [2022-09-29 20:18:15,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572854034] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-29 20:18:15,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-29 20:18:15,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-29 20:18:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029155078] [2022-09-29 20:18:15,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-29 20:18:15,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-29 20:18:15,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:15,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-29 20:18:15,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-09-29 20:18:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:15,027 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:15,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:15,028 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:15,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-09-29 20:18:15,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1107155015, now seen corresponding path program 1 times [2022-09-29 20:18:15,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:15,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359701300] [2022-09-29 20:18:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:15,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:15,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359701300] [2022-09-29 20:18:15,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359701300] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-29 20:18:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289978161] [2022-09-29 20:18:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:15,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:18:15,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:15,263 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-29 20:18:15,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-29 20:18:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-29 20:18:15,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 20:18:15,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-29 20:18:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:15,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-29 20:18:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:15,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289978161] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-29 20:18:15,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-29 20:18:15,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-09-29 20:18:15,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931778327] [2022-09-29 20:18:15,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-29 20:18:15,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-29 20:18:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-29 20:18:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-09-29 20:18:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:15,791 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 7.947368421052632) internal successors, (151), 20 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:15,792 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:15,792 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-29 20:18:16,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-09-29 20:18:16,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-09-29 20:18:16,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:18:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:18:16,367 INFO L85 PathProgramCache]: Analyzing trace with hash 952442676, now seen corresponding path program 1 times [2022-09-29 20:18:16,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:18:16,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509336658] [2022-09-29 20:18:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:16,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:18:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:16,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:18:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509336658] [2022-09-29 20:18:16,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509336658] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-29 20:18:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20239468] [2022-09-29 20:18:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:18:16,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:18:16,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:18:16,632 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-29 20:18:16,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-29 20:18:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:18:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2022-09-29 20:18:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 20:18:16,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-29 20:18:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:17,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-29 20:18:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:18:17,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20239468] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-29 20:18:17,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-29 20:18:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-09-29 20:18:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238970806] [2022-09-29 20:18:17,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-29 20:18:17,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-29 20:18:17,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:18:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-29 20:18:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-09-29 20:18:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:18:17,742 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:18:17,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 8.09375) internal successors, (259), 33 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:18:17,742 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:18:17,742 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 17 states. [2022-09-29 20:18:17,742 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:20:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:20:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-29 20:20:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-09-29 20:20:45,296 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (0 of 1 remaining) [2022-09-29 20:20:45,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-09-29 20:20:45,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-09-29 20:20:45,497 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-09-29 20:20:45,497 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT was SAFE (1/2) [2022-09-29 20:20:45,500 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:20:45,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:20:45,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:20:45,504 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:20:45,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (15)] Waiting until timeout for monitored process [2022-09-29 20:20:45,512 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:20:45,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES ======== [2022-09-29 20:20:45,513 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:20:45,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:20:45,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-29 20:20:45,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:20:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1848965764, now seen corresponding path program 1 times [2022-09-29 20:20:45,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:20:45,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252562896] [2022-09-29 20:20:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:20:45,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:20:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 20:20:45,615 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-29 20:20:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-29 20:20:45,664 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-29 20:20:45,665 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-29 20:20:45,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2022-09-29 20:20:45,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-09-29 20:20:45,665 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-09-29 20:20:45,666 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES was UNSAFE (2/2) [2022-09-29 20:20:45,666 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-29 20:20:45,666 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-09-29 20:20:45,684 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-09-29 20:20:45,686 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-29 20:20:45,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-29 20:20:45,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:20:45,691 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-29 20:20:45,701 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-29 20:20:45,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONASSERT ======== [2022-09-29 20:20:45,701 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2868cd02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-29 20:20:45,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-29 20:20:45,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (16)] Waiting until timeout for monitored process [2022-09-29 20:20:45,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:20:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:20:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1433002990, now seen corresponding path program 1 times [2022-09-29 20:20:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:20:45,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126893101] [2022-09-29 20:20:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:20:45,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:20:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:20:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:20:45,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:20:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126893101] [2022-09-29 20:20:45,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126893101] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-29 20:20:45,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-29 20:20:45,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-29 20:20:45,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273026751] [2022-09-29 20:20:45,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-29 20:20:45,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-29 20:20:45,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:20:45,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-29 20:20:45,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-09-29 20:20:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:20:45,785 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:20:45,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:20:45,785 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:20:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:20:45,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-09-29 20:20:45,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:20:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:20:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash 494247225, now seen corresponding path program 1 times [2022-09-29 20:20:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:20:45,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143555327] [2022-09-29 20:20:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:20:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:20:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:20:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:20:46,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:20:46,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143555327] [2022-09-29 20:20:46,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143555327] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-29 20:20:46,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340910682] [2022-09-29 20:20:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:20:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:20:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:20:46,007 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-29 20:20:46,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-09-29 20:20:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:20:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-29 20:20:46,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 20:20:46,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-29 20:20:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:20:46,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-29 20:20:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:20:46,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340910682] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-29 20:20:46,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-29 20:20:46,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-09-29 20:20:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263687461] [2022-09-29 20:20:46,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-29 20:20:46,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-29 20:20:46,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:20:46,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-29 20:20:46,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-09-29 20:20:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:20:46,459 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:20:46,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 7.947368421052632) internal successors, (151), 20 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:20:46,460 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:20:46,460 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:20:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:20:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-09-29 20:20:46,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-09-29 20:20:47,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-09-29 20:20:47,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-29 20:20:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-29 20:20:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1740713590, now seen corresponding path program 1 times [2022-09-29 20:20:47,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-29 20:20:47,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863340898] [2022-09-29 20:20:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:20:47,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-29 20:20:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:20:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:20:47,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-29 20:20:47,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863340898] [2022-09-29 20:20:47,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863340898] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-29 20:20:47,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349159200] [2022-09-29 20:20:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-29 20:20:47,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-29 20:20:47,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-29 20:20:47,236 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-29 20:20:47,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-09-29 20:20:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-29 20:20:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2022-09-29 20:20:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-29 20:20:47,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-09-29 20:20:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:20:47,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-29 20:20:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-29 20:20:48,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349159200] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-29 20:20:48,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-29 20:20:48,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-09-29 20:20:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324008085] [2022-09-29 20:20:48,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-29 20:20:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-29 20:20:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-29 20:20:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-29 20:20:48,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-09-29 20:20:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-29 20:20:48,242 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-29 20:20:48,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 8.09375) internal successors, (259), 33 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-29 20:20:48,243 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2022-09-29 20:20:48,243 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 17 states. [2022-09-29 20:20:48,243 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.