/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-Lazy-NoForkJoinOpt-wrwc.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-820ea7a [2022-02-19 11:02:05,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-19 11:02:05,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-19 11:02:05,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-19 11:02:05,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-19 11:02:05,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-19 11:02:05,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-19 11:02:05,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-19 11:02:05,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-19 11:02:05,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-19 11:02:05,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-19 11:02:05,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-19 11:02:05,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-19 11:02:05,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-19 11:02:05,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-19 11:02:05,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-19 11:02:05,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-19 11:02:05,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-19 11:02:05,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-19 11:02:05,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-19 11:02:05,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-Lazy-NoForkJoinOpt-wrwc.epf [2022-02-19 11:02:05,950 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-19 11:02:05,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-19 11:02:05,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-19 11:02:05,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-19 11:02:05,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-19 11:02:05,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-19 11:02:05,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-19 11:02:05,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-19 11:02:05,952 INFO L138 SettingsManager]: * Use SBE=true [2022-02-19 11:02:05,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-19 11:02:05,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-19 11:02:05,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-19 11:02:05,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * Construct finite automaton lazily=true [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-19 11:02:05,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * MCR: Overapproximate write-read-write conflicts=false [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * MCR: Optimize fork and join=false [2022-02-19 11:02:05,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-19 11:02:06,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-19 11:02:06,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-19 11:02:06,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-19 11:02:06,151 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-19 11:02:06,152 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-19 11:02:06,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl [2022-02-19 11:02:06,153 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl' [2022-02-19 11:02:06,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-19 11:02:06,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-19 11:02:06,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-19 11:02:06,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-19 11:02:06,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-19 11:02:06,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,190 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-19 11:02:06,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-19 11:02:06,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-19 11:02:06,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-19 11:02:06,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-19 11:02:06,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-19 11:02:06,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-19 11:02:06,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-19 11:02:06,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-19 11:02:06,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/1) ... [2022-02-19 11:02:06,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-19 11:02:06,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-19 11:02:06,234 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) [2022-02-19 11:02:06,240 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 [2022-02-19 11:02:06,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-19 11:02:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-19 11:02:06,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-19 11:02:06,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-19 11:02:06,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-19 11:02:06,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-19 11:02:06,264 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-19 11:02:06,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-19 11:02:06,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-19 11:02:06,264 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-19 11:02:06,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-19 11:02:06,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-19 11:02:06,266 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-19 11:02:06,313 INFO L234 CfgBuilder]: Building ICFG [2022-02-19 11:02:06,314 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-19 11:02:06,475 INFO L275 CfgBuilder]: Performing block encoding [2022-02-19 11:02:06,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-19 11:02:06,489 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-19 11:02:06,491 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 11:02:06 BoogieIcfgContainer [2022-02-19 11:02:06,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-19 11:02:06,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-19 11:02:06,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-19 11:02:06,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-19 11:02:06,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 11:02:06" (1/2) ... [2022-02-19 11:02:06,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f105280 and model type horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 11:02:06, skipping insertion in model container [2022-02-19 11:02:06,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 11:02:06" (2/2) ... [2022-02-19 11:02:06,496 INFO L111 eAbstractionObserver]: Analyzing ICFG horseshoe.wvr.bpl [2022-02-19 11:02:06,499 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-19 11:02:06,499 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-19 11:02:06,499 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-19 11:02:06,500 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-19 11:02:06,552 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-19 11:02:06,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-02-19 11:02:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-19 11:02:06,597 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) [2022-02-19 11:02:06,599 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 [2022-02-19 11:02:06,627 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-19 11:02:06,634 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mLazyFiniteAutomaton=true, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=false, mMcrOverapproximateWrwc=false [2022-02-19 11:02:06,634 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-19 11:02:40,751 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 185019 transitions and produced 62002 states. [2022-02-19 11:02:40,753 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-19 11:02:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-19 11:02:40,758 INFO L85 PathProgramCache]: Analyzing trace with hash 640305352, now seen corresponding path program 1 times [2022-02-19 11:02:40,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-19 11:02:40,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492014091] [2022-02-19 11:02:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-19 11:02:40,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-19 11:02:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-19 11:02:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 700 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-19 11:02:41,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-19 11:02:41,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492014091] [2022-02-19 11:02:41,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492014091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-19 11:02:41,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076818131] [2022-02-19 11:02:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-19 11:02:41,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-19 11:02:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-19 11:02:41,675 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) [2022-02-19 11:02:41,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-19 11:02:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-19 11:02:41,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-19 11:02:41,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-19 11:02:43,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-19 11:02:43,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-19 11:02:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 700 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-19 11:02:43,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-19 11:02:43,471 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-19 11:02:43,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-02-19 11:02:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 700 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-19 11:02:43,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076818131] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-19 11:02:43,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-19 11:02:43,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-02-19 11:02:43,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501141399] [2022-02-19 11:02:43,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-19 11:02:43,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-19 11:02:43,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-19 11:02:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-19 11:02:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-02-19 11:02:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:02:43,628 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-19 11:02:43,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 29 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-19 11:02:43,630 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:03:18,408 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 186416 transitions and produced 60409 states. [2022-02-19 11:03:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:03:18,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-19 11:03:18,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-02-19 11:03:18,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-19 11:03:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-19 11:03:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1027494703, now seen corresponding path program 2 times [2022-02-19 11:03:18,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-19 11:03:18,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38783890] [2022-02-19 11:03:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-19 11:03:18,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-19 11:03:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-19 11:03:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 886 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-02-19 11:03:18,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-19 11:03:18,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38783890] [2022-02-19 11:03:18,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38783890] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-19 11:03:18,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482036178] [2022-02-19 11:03:18,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-19 11:03:18,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-19 11:03:18,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-19 11:03:18,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-19 11:03:18,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-19 11:03:19,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-19 11:03:19,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-19 11:03:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-19 11:03:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-19 11:03:19,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-19 11:03:19,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-19 11:03:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 886 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-02-19 11:03:19,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-19 11:03:20,252 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-19 11:03:20,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-02-19 11:03:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 886 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-02-19 11:03:20,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482036178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-19 11:03:20,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-19 11:03:20,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-02-19 11:03:20,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774057149] [2022-02-19 11:03:20,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-19 11:03:20,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-19 11:03:20,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-19 11:03:20,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-19 11:03:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2022-02-19 11:03:20,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:03:20,356 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-19 11:03:20,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.411764705882353) internal successors, (218), 33 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-19 11:03:20,357 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:03:20,357 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:04:08,759 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 268464 transitions and produced 86508 states. [2022-02-19 11:04:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:04:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:04:08,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-19 11:04:08,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-19 11:04:08,960 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-19 11:04:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-19 11:04:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash 870578056, now seen corresponding path program 3 times [2022-02-19 11:04:08,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-19 11:04:08,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638652200] [2022-02-19 11:04:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-19 11:04:08,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-19 11:04:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-19 11:04:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 953 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-02-19 11:04:09,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-19 11:04:09,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638652200] [2022-02-19 11:04:09,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638652200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-19 11:04:09,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333030761] [2022-02-19 11:04:09,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-19 11:04:09,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-19 11:04:09,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-19 11:04:09,228 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-19 11:04:09,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-19 11:04:09,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-02-19 11:04:09,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-19 11:04:09,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-19 11:04:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-19 11:04:09,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-19 11:04:10,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-19 11:04:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 905 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-02-19 11:04:10,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-19 11:04:10,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-19 11:04:10,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-19 11:04:10,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-19 11:04:10,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-02-19 11:04:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 0 proven. 905 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-02-19 11:04:10,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333030761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-19 11:04:10,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-19 11:04:10,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2022-02-19 11:04:10,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987361381] [2022-02-19 11:04:10,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-19 11:04:10,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-19 11:04:10,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-19 11:04:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-19 11:04:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2022-02-19 11:04:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:04:10,591 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-19 11:04:10,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.837837837837838) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-19 11:04:10,591 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:04:10,591 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:04:10,591 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:05:22,715 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 336902 transitions and produced 115834 states. [2022-02-19 11:05:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:05:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:05:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-19 11:05:22,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-19 11:05:22,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-19 11:05:22,939 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-19 11:05:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-19 11:05:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash -165928050, now seen corresponding path program 4 times [2022-02-19 11:05:22,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-19 11:05:22,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677431069] [2022-02-19 11:05:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-19 11:05:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-19 11:05:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-19 11:05:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 1025 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-02-19 11:05:23,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-19 11:05:23,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677431069] [2022-02-19 11:05:23,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677431069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-19 11:05:23,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079850097] [2022-02-19 11:05:23,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-19 11:05:23,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-19 11:05:23,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-19 11:05:23,381 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) [2022-02-19 11:05:23,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-19 11:05:23,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-19 11:05:23,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-19 11:05:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-19 11:05:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-19 11:05:24,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-19 11:05:24,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-19 11:05:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 1025 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-02-19 11:05:24,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-19 11:05:25,188 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-19 11:05:25,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-02-19 11:05:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 1025 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-02-19 11:05:25,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079850097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-19 11:05:25,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-19 11:05:25,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-02-19 11:05:25,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51800368] [2022-02-19 11:05:25,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-19 11:05:25,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-19 11:05:25,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-19 11:05:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-19 11:05:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2022-02-19 11:05:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:05:25,298 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-19 11:05:25,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.078947368421052) internal successors, (231), 37 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-19 11:05:25,299 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:05:25,299 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:05:25,299 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 80 states. [2022-02-19 11:05:25,299 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:06:38,834 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 359069 transitions and produced 119018 states. [2022-02-19 11:06:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:06:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:06:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-19 11:06:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:06:38,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-19 11:06:39,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-19 11:06:39,051 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-19 11:06:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-19 11:06:39,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1579989260, now seen corresponding path program 5 times [2022-02-19 11:06:39,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-19 11:06:39,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850409367] [2022-02-19 11:06:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-19 11:06:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-19 11:06:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-19 11:06:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 0 proven. 1067 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-02-19 11:06:39,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-19 11:06:39,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850409367] [2022-02-19 11:06:39,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850409367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-19 11:06:39,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004601463] [2022-02-19 11:06:39,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-19 11:06:39,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-19 11:06:39,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-19 11:06:39,422 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-19 11:06:39,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-19 11:06:39,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-02-19 11:06:39,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-19 11:06:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 86 conjunts are in the unsatisfiable core [2022-02-19 11:06:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-19 11:06:41,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-19 11:06:41,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-19 11:06:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-02-19 11:06:41,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-19 11:06:41,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-19 11:06:41,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-02-19 11:06:42,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-19 11:06:42,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-02-19 11:06:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 0 proven. 1054 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-02-19 11:06:42,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004601463] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-19 11:06:42,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-19 11:06:42,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 38, 23] total 66 [2022-02-19 11:06:42,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198419666] [2022-02-19 11:06:42,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-19 11:06:42,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-19 11:06:42,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-19 11:06:42,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-19 11:06:42,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4256, Unknown=0, NotChecked=0, Total=4422 [2022-02-19 11:06:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-19 11:06:42,779 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-19 11:06:42,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.059701492537314) internal successors, (272), 66 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-19 11:06:42,780 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:06:42,780 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:06:42,780 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 80 states. [2022-02-19 11:06:42,780 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 31 states. [2022-02-19 11:06:42,780 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.